|Número de publicación||USRE27145 E|
|Tipo de publicación||Concesión|
|Fecha de publicación||22 Jun 1971|
|Fecha de presentación||20 May 1969|
|Fecha de prioridad||20 May 1969|
|Número de publicación||US RE27145 E, US RE27145E, US-E-RE27145, USRE27145 E, USRE27145E|
|Inventores||Robert C. Jones|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citada por (191), Clasificaciones (10)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
June 22, 1971 TEIPERATURE, C
TEISILE, PSI N LII c O o 3 8 8 I I I R- C. JONES I Re. 27,145
APPAREIIT GLASS POINT, C
l l l 1.0.Sl0E-0HMN FIG. I
TEIISILE STRENGTH AT 75C I I l as c, suns-cam FIG. 3
BALL REBOUND, 7.
7o C SIDE-CIIAIN FIG. 2
TENSILE STREIIGIH AT I00C I l I so 5o 10 1. 0, sum -cmuu FIG. 4
ROBERT C. JONES BY I @QM HIS AGENT States Patent Re. 27,145 Re issued June 22, 1971 27 145 HYDROGENATED BL( )CK COPOLYMERS F BUTADIENE AND A MONOVINYL ARYL HYDROCARBON Robert C. Jones, San Francisco, Calif., assignor to Shell Oil Company, New York, NY.
Original No. 3,431,323, dated Mar. 4, 1969, Ser. No. 338,795, Jan. 20, 1964. Application for reissue May 20, 1969, Ser. No. 848,755
Int. Cl. C08f /04 US. Cl. 260-880 10 Claims Matter enclosed in heavy brackets appears in the original patent but forms no part of this reissue specification; matter printed in italics indicates the additions made by reissue.
ABSTRACT OF THE DISCLOSURE Hydrogenated block copolymers having a superior combination of physical properties are prepared by block polymerizing a vinyl arene with butadiene in the presence of a polar compound tocause a limited amount of branching in the polybutadiene block and thereafter hydrogenating the polymer.
This invention is concerned with novel block copolymers, their compositions and processes for their preparation. More particular, the invention is directed to certain hydrogenated block copolymers having optimum physical properties based upon a critical microstructure of the elastomeric polymeric blocks contained therein.
Rubbers and elastomers of either natural or synthetic origin normally require vulcanization in order to obtain useful elastomeric properties. Before vulcanization, rubbers possess tacky properties and low strength which makes them of little utility except as rubber cements. Another of their prime shortcomings is that of stability relative to either heat or oxidation.
Optimum elastomeric properties are not usually attained until the rubber has been subjected to a vulcanization treatment such as by means of heating with sulfur, sulfur compounds, peroxides or other means. Vulcanization usually results in insolubilization of the rubber in most common solvents. While this may be of advantage in certain situations, for many purposes such as the application of paints, etc., and in the formation of molded objects, insolubilization is in fact a substantial disadvantage. It has been necessary in many cases to apply vulcanized rubbers in the form of latices or to vulcanize the rubber after it has been formed in a molding operation or the like. vulcanization under such circumstances often results in substantial losses of product, since the flashings from moldings etc., cannot be readily reworked but must be incorporated in other compositions acting merely as a filler or reinforcing agent.
It would be desirable to have a rubber which behaves like a vulcanized rubber without the necessity for vulcanization, as well as having the property of being soluble in a selected class of relatively inexpensive solvents such as certain hydrocarbons. Recently, a critically limited class of block copolymers has been investigated to determine the optimum structure for obtaining these combinations of properties. The block copolymers under consideration comprise primarily those having a general structure ABA wherein the two terminal polymer blocks A comprise thermoplastic polymer blocks of vinylarenes such as polystyrene, while block B is a polymer block of a conjugated diene. The proportion of the thermoplastic terminal blocks to the center elastomeric polymer block and the relative molecular weights of each of these blocks is balanced to obtain a rubber having an optimum combination of properties such that it behaves as a vulcanized rubber without requiring the actual step of vulcanization. Moreover, these block copolymers can be designed not only with this important advantage but also so as to be handled in thermoplastic forming equipment and are soluble in a variety of relatively low cost solvents.
While these block copolymers have a number of outstanding technical advantages, one of their principal limitations lies in their sensitivity to oxidation. This is due to their unsaturated character which can be minimized by hydrogenating the copolymer, especially in the center section comprising the polymeric diene block. Hydrogenation may be effected over the entire molecule, converting the terminal blocks such as polystyrene to polyvinylcyclohexaue blocks, while the diene polymer block is converted to a straight chain hydrocarbon having a relatively high degree of saturation, this portion of the block copolymer having properties similar to polymers of alpha olefins.
The elastomeric properties of certain alpha olefin polymers appear to be due in part to their degree of branching. While the alpha olefin polymers have a basic straight carbon chain backbone, those with elastomeric properties always have dependent alkyl radicals. For example, EPR (ethylene-propylene rubber) has a structure of dependent methyl radicals which appears to provide elasticity and other elastomeric properties. When an essentially unbranched straight chain polymer is formed, such as some polyethylenes, the resulting polymer is essentially nonelastomeric or in the other words relatively rigid, and behaves like a typical thermoplastic without possessing resilience, elongation, tensile strength without yield, low set or other properties characteristic of desirable elastomers.
The problem therefore exists of forming a block copolymer having the self-curing property discussed hereinbefore, solubility in relatively low cost solvents, stability toward oxidation and retention of the elastomeric properties over a wide temperature range in spite of hydrogenation of the polymer to obtain the desired degree of stability.
Now, in accordance with the present invention, a particular type of block copolymer has been prepared meeting in large measure the above requirements and combining within its structure, a configuration enabling the combination of a maximum number of physical properties especially desirable for such products. These polymers are hydrogenated block copolymers having a configuration, prior to hydrogenation, of ABA wherein each of the As is an alkenyl-substituted aromatic hydrocarbon polymer block and B is a butadiene polymer block wherein 3555 mol percent of the condensed butadiene units in the butadiene polymer block have 1,2 configuration. of the carbon atoms present in the butadiene polymer block are in the form of dependent vinyl side chains] Still in accordance with this invention, a means has been devised for the preparation of such branched block copolymers which comprises the steps of utilizing an alkyl lithium catalyst in a relatively inert hydrocarbon solvent for the block copolymer at each stage of its formation modified with a critically defined proportion of a polar compound of the group consisting of ethers, thio-ethers and tertiary amines; forming a first polymer block of an alkenyl aromatic hydrocarbon in said medium to form a living polymer block; adding butadiene thereto and continuing polymerization until the desired weight has been obtained; thereafter introducing an alkenyl arene and continuing block copolymerization to finally obtain the ABA block copolymer wherein the center polybutadiene block has the recited degree of branched configura- 3 :ion. Following the preparation of this unsaturated block :opolymer, the latter is subjected to hydrogenation of auch a degree that the unsaturation of the polybutadiene )lOCk is reduced to less than 10% of its original value.
The block copolymer having the diene center block it least 90% hydrogenated but less than 10% of the )olystyrene units hydrogenated exhibits the dual advanages of improved stability while maintaining good procssability. Block copolymers wherein at least about 25% )f the polystyrene blocks are hydrogenated have the tdvantages both improved stability and increased softenng points. Such compositions may be mixtures of block :opolymers wherein at least part of the molecules are saturated over their entire length, the remaining molecules reing those in which only the butadiene polymer block is it least 90% saturated. Alternatively, the hydrogenated olymers may be those in which at least 90% of the )olybutadiene linkages are hydrogenated and in which he polystyrene blocks are those containing both saturated 1nd unsaturated styrene units.
The figures forming a part of the specification indicate l number of physical properties of block copolymers of his variety containing a Wide range of C side chains howing that a critical range between about 35 and 55 nol percent 1,2 structure, of the carbon atoms in side :hains is required] in order to obtain the optimum comination of the most desired properties, while at the tame time retaining the benefits of self-curing and the )ossibility of processing the polymer in thermoforming :quipment such as extrusion or other thermoplastic moldng devices.
In order to have the most desirable properties, it is referred to form terminal blocks A having average molecilar weights of 4,000-115,000 and polybutadiene blocks 1aving average molecular weights of 20,000450,000. Still more preferably, the terminal blocks have average molec- Jlar weights of 8,00060,000 while the polybutadiene polymer block has an average molecular weight between about 50,000 and 300,000. Likewise, in order to promote the optimum combination of physical properties, it is desirable that the terminal plastic blocks comprise 530% by Weight of the total block copolymer.
The proportion of polar modifying compounds to be used in forming the branched polybutadiene blocks in the above types of block copolymers will depend upon a iumber of factors such as the identity of the polar compound, the precise degree of branching desired, the hydro- :arbon medium utilized and the amount of lithium catalyst present. For the purpose of the present invention, the imount of polar compound will be expressed as a molar ratio of polar compound to lithium alkyl. In order to achieve 3555 mol percent 1,2 structure, of carbon atoms in dependent side chains,] the molar ratio of polar :ompound to lithium should be between about 7 and 70, preferably between about 10 and 40.
The degree of branching of the polybutadiene block is essentially linear with the molar ratio of polar compounds :0 lithium. Consequently, if the ratio is too low, then the desired degree of branching is correspondingly decreased and the resulting block copolymer, when hydrogenated, Is essentially a plastic having substantially non-elastomeric properties e.g. poor rubber properties. On the other hand, if the molar proportion is increased beyond the maximum :imit recited, the degree of branching is excessive and, as I will be seen by reference to the figures, the elastomeric properties of the resulting products following hydrogenazion are drastically damaged. Consequently, the major abjective of the process is to utilize the correct proportion )f polar compound to lithium initiator such that the aranching of the polybutadiene block is within the desired 'ecited range of 35-55 mol percent. or in other terms, 35-55% of the carbon atoms in the polybutadiene block are in the form of dependent C side chains] While the center elastomeric block is preferably a polymerized butaliene polymer having a recited degree of branching, this 4 may be modified, with about 25% by weight of elastomeric block-producing monomers of other conjugated dienes such as isoprene and the like.
The non-elastomeric end polymer blocks comprise homopolymers or copolymers preferably prepared from alkenyl aromatic hydrocarbons and particularly from vinyl aromatic hydrocarbons wherein the aromatic may be either monocyclic or polycyclic (followed by hydrogenation). Typical monomers include styrene, alpha methyl styrene, vinyl xylene, ethyl vinyl xylene, vinyl naphthalene and the like. Mixtures of such monomers may be utilized as well. The two end blocks may be the same or different as long as they meet the generic description of these end blocks insofar as their thermoplastic character is concerned as differentiated from the elastomeric major of the center block. Where, in the specification, general reference is made to polystyrene blocks, it will be understood that other types of poly(-vinyl arenes) may be used in place thereof. The center block may be an elastomer in accordance with the definition contained in ASTM Special Technical Bulletin, No. 184 as follows:
A substance that can be stretched at room temperature to at least twice its original length and, after having been stretched and the stress removed, returned with force to approximately its original length in a short time.
The catalysts employed in the process of the present invention may be defined broadly as lithium based initiators although alkyl lithium initiators are preferred. Other suitable initiators include lithium metal and aryl lithium compounds and in certain instances, dilithium initiators such as dilithium stilbene, lithium l-diphenyl ethylene or lithium naphthalene. Alkyl lithium initiators, the preferred class, may be generally divided into normal alkyl lithiums and branched alkyl lithiums, the latter having a number of functional aspects making them more desirable than the former. Branched alkyl lithium initiators exhibit no disadvantageous induction period in the startup of the polymerization, the rate of polymerization is reasonably rapid but sutficiently steady so that it can be controlled and the products obtained are of a relatively narrow molecular Weight range also adding to the product control and effectiveness thereof for a number of purposes.
Polymerization is normally conducted at temperatures in the order of 20 to about C., preferably about +20 C. and 65 C. The proportion of initiators will depend upon the molecular weight of the products desired, but may be varied, with the latter qualification, between about 1 and about 200 parts per million based on the Weight of the monomers involved.
The basic process when using the lithium-based catalysts comprises forming a solution of the first alkenyl arene monomer in an inert hydrocarbon such as alkanes, alkenes or cycloalkanes modified by the presence of the polar compounds of the group consisting of ethers, thioethers and tertiary amines. Of course, since the presence of the polar compound is not essential in the formation of the first polymer block with many initiators, it is not essential to introduce the polar compounds at this stage since it may be introduced just prior to or together with addition of the butadiene for the formation of middle elastomeric branch block. Among the polar compounds which may be added in accordance with the one aspect of this invention ae dimethyl ether, diethyl ether, ethyl methyl ether, ethyl propyl ether, dioxane, dibenzyl ether, diphenyl ether, dimethyl sulfide, diethyl sulfide, tetramethylene oxide (tetrahydro furane), tripropyl amine, tributyl amine, trimethyl amine, triethyl amine, pyridine and quinoline. Mixtures of these polar compounds may be employed in the practice 'of the present invention. The proportion of polar compounds should be restricted in accordance with the limits set forth hereinbefore in order to obtain the desired critical degree of branching in the center elastomeric block.
When the lithium initiator, polar compound, alkenyl aromatic monomer and inert hydrocarbon are combined,
polymerization proceeds to produce the first terminal polymeric block having an average molecular weight between about 4000 and 100,000, this block being terminated on one end with a lithium radical and being referred to as a living polymer. At this time, without further alteration or removal of this lithium radical, butadiene is injected into the system and block polymerization occurs, the presence of the polar compound now becoming important in producing the desired degree of branching of the polybutadiene block. The temperature, initiator concentration and solvent may be adjusted at this time to optimize the desired degree of polymerization or rate of reaction. The resulting product is then typified by the general structure ABLi, a living polymer block of the two monomers thus far employed. After this, a second addition of an alkenyl aromatic hydrocarbon is made to produce the final terminal block and result in the formation of the three block system ABA which is the result of polymerization followed by termination with a polar terminator such as an alcohol and the like.
Having obtained the basic polymer with the described degree of branching in the center elastomeric butadiene polymer block, the next necessary stage is to hydrogenate -the polymer in order to increase its service temperature and at the same time to improve the oxidation stability of the product. Hydrogenation may be conducted utilizing a variety of hydrogenation catalysts such as nickel on kieselguhr, Raney nickel, copper chromate, molybdenum sulfide, and finely divided platinum or other noble metals on a low surface area carrier.
Hydrogenation may be conducted at any desired temperature or pressure, say, from atmospheric to 3000 p.s.i.g., the usual range being between 100 and 1000 p.s.i.g. at temperatures from about 75 F. to 600 F., for times between about 0.1 and 24 hours, preferably 0.2-8 hours. Preferred catalysts comprise the reduced metal products obtained by reduction of cobalt nickel, tungsten or molybdenum compounds with aluminum alkyls or hydrides. These catalysts are selective, in that the elasomeric block, a set of block copolymers was prepared having similar individual block molecular weights. While the polar compound was varied relative to the amount of lithium alkyl initiator present, the following is a typical example by which this set of block copolymers were prepared: Styrene (60 grams) was dissolved in benzene 1400 grams) containing varying proportions of tetrahydrofurane as the polar compound. This mixture was brought to C. and 0.003 mol of secondary butyl lithium was added. Polymerization was conducted at 40 C. in a reactor until all of the styrene had been converted to a polymer terminated with a lithium radical. Thereafter, butadiene was added to the reaction mixture (450 grams) and polymerization was continued until complete utilization of the butadiene monomer. The styrene-butadiene block polymer so formed was then modified by the addition of styrene (60 grams) and polymerization continued until no monomer remain: The resulting polystyrene-polybutadiene-polystyrene block polymer had average block molecular Weights of 15,000l00,00015,000.
The block copolymers so prepared by variation in tetrahydrofurane ratio relative to secondary butyl lithium were then hydrogenated at 500 p.s.i.g. hydrogen pressure, for 18 hours at 160 C. utilizing 0.3 gram of nickel on kieselguhr support per gram of polymer. The hydrogenated polymers were then tested for physical properties which are shown in the table below.
These data were then plotted in part in FIGURES l-4. It will be evident from a study of these figures and the accompanying table of data that block copolymers wherein the 1,2 content [side chain content] is between 35 and mol percent of the elastomeric center block appear to offer the best elastomeric compromise between low temperature resilience and stress-strain properties. At lower side chain levels, lower rebound and higher glass points are experienced. At higher side chain levels, tensile strength decreases along with rebuond, and glass point increases. Furthermore, tensile strength at elevated temperatures sulfers at 1,2 [side chain] contents above 55 mol diene block is hydrogenated rapidly, while the styrene percent. When the block copolymers having little or no PROPERTIES OF HYDROGENATED SBS, PRECURSOR HAVING VARYING 1,2 CONTENT AND 15-100-15Xl0' BLOCK LENGTHS Precursor, Modulus percent 1,2 in I.V., dl./g. Tensile Elongation butadiene (toluen I2 No at. break, 300%, 500%, at break, Set, Shore A block 25 0.) g 12/100 g p.s.i. p.s.i. p.s.i. percent percent hardness blocks are more slowly hydrogenated unless hydrogenation temperatures are increased.
Since the polybutadiene block is that most subject to oxidative attack, it is the primary objective of hydrogenation to reduce the unsaturation of this block, the hydrogenation of the terminal plastic blocks being of less importance. With some selective catalysts, this is readily accomplished whereas with others, the hydrogenation proceeds along the entire chain.
To improve the stability of the block copolymers, the diene unsaturation (measured by iodine number) should be reduced to less than 10% (preferably less than 5%) of its original value. Reduction of styrene unsaturation (measured by ultra violet) may be expressed as an average of 0100%; e.g., no reduction at all, and up to complete reduction. At intermediate reduction levels, it will be understood that the hydrogenation product may be a mixture of products in which some of the polystyrene blocks are hydrogenated more than others.
In order to compare the physical properties of the branched copolymers according to the present invention with those containing either less or more branching in the side chain branching in the center blocks were hydrogenated, the products resulted in a plastic-type polymer of limited solubility presumably due to a degree of crystallinity in the center segment.
I claim as my invention:
1. As a new composition of matter, a hydrogenated block copolymer having the general configuration ABA wherein, prior to hydrogenation.
(1) each A is a polymerized mono alkenyl aromatic hydrocarbon block having an average molecular weight of about 4,000115,000;
(2) B is a polymerized butadiene hydrocarbon block having an average molecular weight of about 20,000- 450,000;
(3) the blocks A constituting 2-33 weight percent of the copolymer;
(4) 35-55 mol percent of the condensed butadiene units in block B having 1,2-configuration; of the butadiene carbon atoms in block B being vinyl side chains;]
() and the unsaturation of block B having been reduced to less than of the original unsaturation.
2. A new composition of matter according to claim 1 wherein prior to hydrogenation the polymeric blocks A are polymer blocks of a vinyl aromatic hydrocarbon.
3. A new composition of matter according to claim 1 wherein the blocks A comprise 5-30% by weight of the copolymer, the unsaturation of block B is reduced to less than 5% of its original value and the average unsaturation of the hydrogenated block copolymer is reduced to less than of the original value.
4. As a new composition of matter, a hydrogenated block copolymer having the general configuration wherein, prior to hydrogenation,
(1) each A is a polymerized styrene block having an average molecular weight of about 8,00060,000;
(2) B is a polymerized butadiene block having an average molecular weight of about 50,000300,000, 40- 50 mol percent of the condensed butadiene units in block B having 1,2-c0nfigurati0n; of the butadiene carbon atoms in the block being vinyl sidechains;]
(3) the blocks A comprising 530% by weight of the copolymer; the unsaturation of block B having been reduced by hydrogenation to less than 10% of its original value.
5. A hydrogenated block copolymer composition acaccording to claim 1 wherein an average of less than about 10% of the mono alkenyl aromatic hydrocarbon units are hydrogenated.
6. A hydrogenated block copolymer composition ac- V cording to claim 1 wherein an average of more than about 25% of the mono alkenyl aromatic hydrocarbon units are hydrogenated. [hydrogeanted] 7. The process for the preparation of a block copolymer comprising the steps:
(a) polymerizing a mono alkenyl arene in the presence of an inert hydrocarbon solvent and alithium alkyl catalyst whereby a polymer block A having an average molecular weight of 4,000115,000 terminated with a lithium ion is formed;
(b) adding butadiene to the lithium-terminated block and block copolymerizing it with said first block in the presence of a polar compound of the group consisting of ethers, thioethers and tertiary amines, the molar ratio of said polar compound to lithium alkyl catalyst being between about 7 and 70, whereby a block copolymer terminated with lithium is formed 3555 mol percent of the condensed butdiene units in block B having 1,2-c0nfigurati0n; of the carbon atom in the butadiene polymer block being vinyl side chains,] the *butadiene polymer block B having an average molecular weight of 20,000450,000;
(0) adding thereto a mono alkenyl arene and block polymerizing it with the block copolymer of step (b), to form a block polymer ABA;
(d) and hydrogenating the block polymer whereby the unsaturation of the diene polymer block B is reduced to less than 10% of its original value.
8. A process according to claim 7 'Wherein the polar compound in step (b) is an ether.
9. A process according to claim 7 wherein the mono alkenyl arene is styrene and the polar compound is tetrahydrofiuran.
10. A process according to claim 9 wherein the lithium alkyl is a lithium secondary alkyl.
References Cited The following references, cited by the Examiner, are of record in the patented file of this patent or the original patent UNITED STATES PATENTS 3,333,024 7/1967 Haefele 260-880 3,140,278 7/ 1964 Kuntz 260879 3,149,182 9/1964 Porter 260879 3,239,478 3/1966 Harlan 260879 3,251,905 5/1966 Zelinski 260-879 3,299,174 1/1967 Kuhre 260879 OTHER REFERENCES Kuntz: Journal Polymer Science, vol. 54, pp. 569-586 1961), pp. 576-577 and 583-584 specifically relied upon.
JAMES A. SEIDLECK, Primary Examiner R. A. GAITHER, Assistant Examiner US. Cl. X.R. 260879
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US4970254 *||22 Sep 1988||13 Nov 1990||Shell Oil Company||Method for hydrogenating functionalized polymer and products thereof|
|US4970265 *||27 Mar 1989||13 Nov 1990||Shell Oil Company||Functionalized polymers and process for modifying unsaturated polymers|
|US4983673 *||22 Dic 1988||8 Ene 1991||Shell Oil Company||High impact resistant blends of thermoplastic polyamides and modified diblock copolymers|
|US4988765 *||22 Dic 1988||29 Ene 1991||Shell Oil Company||High impact resistant blends of thermoplastic polyamides and modified diblock copolymers|
|US5051457 *||16 Jul 1990||24 Sep 1991||Shell Oil Company||Asphalt-block copolymer roofing composition|
|US5106917 *||28 Feb 1990||21 Abr 1992||Shell Oil Company||Peelable lidstock based on polybutylene block copolymer blends|
|US5149895 *||16 Ene 1990||22 Sep 1992||Mobil Oil Corporation||Vulcanizable liquid compositions|
|US5166277 *||31 Oct 1991||24 Nov 1992||Shell Oil Company||Hydrogenation of unsaturation in low molecular weight diene polymers|
|US5175212 *||4 Nov 1991||29 Dic 1992||Shell Oil Company||Low temperature toughening of polycarbonates with a modified block copolymer|
|US5177155 *||13 May 1991||5 Ene 1993||Shell Oil Company||Selective hydrogenation of conjugation diolefin polymers with rare earth catalysts|
|US5187236 *||16 Ene 1990||16 Feb 1993||Mobil Oil Corporation||Solid block and random elastomeric copolymers|
|US5189110 *||16 Sep 1991||23 Feb 1993||Asahi Kasei Kogyo Kabushiki Kaisha||Shape memory polymer resin, composition and the shape memorizing molded product thereof|
|US5209862 *||30 Ene 1991||11 May 1993||Shell Oil Company||Vi improver and composition containing same|
|US5218033 *||25 Nov 1991||8 Jun 1993||Shell Oil Company||Functionalized vinyl aromatic/conjugated diolefin block copolymer and salt of fatty acid compositions|
|US5266635 *||26 Feb 1993||30 Nov 1993||Shell Oil Company||Impact resistant polycarbonates containing elastomers having phenolic groups|
|US5308676 *||20 Sep 1991||3 May 1994||Shell Oil Company||Torchable roll roofing membrane|
|US5336726 *||11 Mar 1993||9 Ago 1994||Shell Oil Company||Butadiene polymers having terminal silyl groups|
|US5342885 *||8 Dic 1989||30 Ago 1994||Shell Oil Company||Epoxy resin coating with COOH-grated hydrogenated block copolymer|
|US5349015 *||8 Dic 1989||20 Sep 1994||Shell Oil Company||Melt blending acid or anhydride-crafted block copolymer pellets with epoxy resin|
|US5369167 *||28 Mar 1994||29 Nov 1994||Shell Oil Company||Melt blending acid or anhydride-grafted block copolymer pellets with epoxy resin|
|US5376745 *||1 Dic 1993||27 Dic 1994||Shell Oil Company||Low viscosity terminally functionalized isoprene polymers|
|US5378761 *||24 Jun 1993||3 Ene 1995||Shell Oil Company||Monohydroxylated 1,3-polybutadiene/polyisocyanate product reacted with hydroxyl-functional resin|
|US5389711 *||14 Feb 1990||14 Feb 1995||Shell Oil Company||Plasticisers for salt functionalized polyvinyl aromatics|
|US5391637 *||23 Nov 1993||21 Feb 1995||Shell Oil Company||Capping of anionic polymers with oxetanes|
|US5393843 *||31 Ago 1992||28 Feb 1995||Shell Oil Company||Butadiene polymers having terminal functional groups|
|US5405911 *||15 Sep 1994||11 Abr 1995||Shell Oil Company||Butadiene polymers having terminal functional groups|
|US5405914 *||29 Jul 1993||11 Abr 1995||Shell Oil Company||Process for improving the color of selectively hydrogenated block copolymers modified with acid compounds or derivatives|
|US5418296 *||6 Oct 1994||23 May 1995||Shell Oil Company||Capping of anionic polymers with oxetanes|
|US5458791 *||1 Jul 1994||17 Oct 1995||Shell Oil Company||Star polymer viscosity index improver for oil compositions|
|US5460739 *||9 Sep 1994||24 Oct 1995||Shell Oil Company||Star polymer viscosity index improver for oil compositions|
|US5554691 *||31 Ago 1994||10 Sep 1996||Shell Oil Company||Adhesives, sealants, coatings and polymer compositions containing monohydroxylated polydienes in hydroxyl functional resins|
|US5594072 *||1 Ago 1995||14 Ene 1997||Shell Oil Company||Liquid star polymers having terminal hydroxyl groups|
|US5602206 *||4 Mar 1992||11 Feb 1997||Basf Corporation||Block copolymer process|
|US5616542 *||3 Abr 1996||1 Abr 1997||Shell Oil Company||Oil with asymmetric radial polymer having block copolymer arm|
|US5658526 *||1 Nov 1995||19 Ago 1997||Shell Oil Company||Method to prepare blown films of vinyl aromatic/conjugated diolefin block copolymer|
|US5663250 *||16 May 1996||2 Sep 1997||Shell Oil Company||Deprotection with molten salt|
|US5681895 *||29 Ago 1996||28 Oct 1997||Shell Oil Company||Coupling of anionic polymers with trialkoxysilanes having silicon-hydrogen bonds|
|US5777031 *||25 Jul 1997||7 Jul 1998||Shell Oil Company||High 1,2 content thermoplastic elastomer/oil/polyolefin composition|
|US5863646 *||25 Mar 1996||26 Ene 1999||Ppg Industries, Inc.||Coating composition for plastic substrates and coated plastic articles|
|US6148830||30 Sep 1996||21 Nov 2000||Applied Elastomerics, Inc.||Tear resistant, multiblock copolymer gels and articles|
|US6203913||16 Dic 1998||20 Mar 2001||Ppg Industries Ohio, Inc.||Coating composition for plastic substrates|
|US6225415||20 Sep 1999||1 May 2001||University Of North Carolina At Charlotte||Process to selectively place functional groups within polymer chain|
|US6300414||28 Ago 1998||9 Oct 2001||Basf Corporation||Additive for coating compositions for adhesion to TPO substrates|
|US6420490||24 Nov 1999||16 Jul 2002||Kraton Polymers U.S. Llc||Telechelic polymers are produced by ozonation degradation of diene polymers|
|US6423778||30 Jun 1999||23 Jul 2002||Basf Corporation||Process for coating olefinic substrates|
|US6451865||30 Oct 1998||17 Sep 2002||Kraton Polymers U.S. Llc||Foam composition comprising oil, thermoplastic elastomer and expandable particles|
|US6451913||21 Ago 2000||17 Sep 2002||Kraton Polymers U.S. Llc||Radial hydrogenated block copolymers showing one phase melt behavior|
|US6593423||3 May 2000||15 Jul 2003||Ppg Industries Ohio, Inc.||Adhesion promoting agent and coating compositions for polymeric substrates|
|US6630532 *||7 Sep 2000||7 Oct 2003||Kraton Polymer U.S. Llc||Modified styrenic block copolymer compounds having improved elastic performance|
|US6699941||7 Nov 2002||2 Mar 2004||Kraton Polymers U.S. Llc||Block copolymer|
|US6759454||6 Feb 2003||6 Jul 2004||Kraton Polymers U.S. Llc||Polymer modified bitumen compositions|
|US6777026||7 Oct 2002||17 Ago 2004||Lord Corporation||Flexible emissive coatings for elastomer substrates|
|US6844412||25 Jul 2002||18 Ene 2005||Lord Corporation||Ambient cured coatings and coated rubber products therefrom|
|US6939916 *||21 Abr 2003||6 Sep 2005||Basf Corporation||Adhesion promoter, coating compositions for adhesion to olefinic substrates and methods therefor|
|US6979714||1 Abr 2003||27 Dic 2005||Ppg Industries Ohio, Inc.||Adhesion promoting agent and coating compositions for polymeric substrates|
|US6987142||6 Feb 2003||17 Ene 2006||Kraton Polymers U.S. Llc||Adhesives and sealants from controlled distribution block copolymers|
|US7001950||24 Mar 2003||21 Feb 2006||Kraton Polymers U.S. Llc||Tetrablock copolymer and compositions containing same|
|US7001956||4 Jun 2003||21 Feb 2006||Kraton Polymers U.S. Llc||Articles prepared from hydrogenated block copolymers|
|US7012118||8 Oct 2003||14 Mar 2006||Kraton Polymers U.S. Llc||Photopolymerizable compositions and flexographic plates prepared from controlled distribution block copolymers|
|US7018962||12 Jun 2003||28 Mar 2006||Infineum International Limited||Viscosity index improver concentrates|
|US7067589||10 Feb 2005||27 Jun 2006||Kraton Polymers U.S. Llc||Block copolymers and method for making same|
|US7108873||20 Jul 2002||19 Sep 2006||Applied Elastomerics, Inc.||Gelatinous food elastomer compositions and articles|
|US7134236||20 Jul 2002||14 Nov 2006||Applied Elastomerics, Inc.||Gelatinous elastomer compositions and articles for use as fishing bait|
|US7138456||10 Feb 2005||21 Nov 2006||Bening Robert C||Block copolymers and method for making same|
|US7141621||6 Feb 2003||28 Nov 2006||Kraton Polymers U.S. Llc||Gels from controlled distribution block copolymers|
|US7166672||4 Jun 2003||23 Ene 2007||Kraton Polymers U.S. Llc||Gels from silane-coupled block copolymers|
|US7169848||6 Feb 2003||30 Ene 2007||Kraton Polymers U.S. Llc||Block copolymers and method for making same|
|US7169850||10 Feb 2005||30 Ene 2007||Kraton Polymers U.S. Llc||Block copolymers and method for making same|
|US7186779||13 Ene 2003||6 Mar 2007||Kraton Polymers U.S. Llc||Block copolymer compositions, having improved mechanical properties and processability|
|US7208184||20 Jul 2002||24 Abr 2007||Applied Elastomerics, Inc.||Gelatinous food elastomer compositions and articles for use as fishing bait|
|US7220798||28 Feb 2005||22 May 2007||Kraton Polymers Us Llc||Process for preparing block copolymer and resulting composition|
|US7223816||7 Feb 2003||29 May 2007||Handlin Jr Dale L||Solvent-free, hot melt adhesive composition comprising a controlled distribution block copolymer|
|US7226484||4 Ago 2004||5 Jun 2007||Applied Elastomerics, Inc.||Tear resistant gels and articles for every uses|
|US7232864||14 Oct 2004||19 Jun 2007||Bening Robert C||Coupled radial anionic polymers|
|US7234560||30 Sep 2003||26 Jun 2007||Applied Elastomerics, Inc.||Inflatable restraint cushions and other uses|
|US7241540||27 Abr 2004||10 Jul 2007||Kraton Polymers U.S. Llc||Photocurable compositions and flexographic printing plates comprising the same|
|US7244785||10 Feb 2005||17 Jul 2007||Bening Robert C||Block copolymers and method for making same|
|US7262248||11 May 2004||28 Ago 2007||Kraton Polymers U.S. Llc||Articles prepared from high molecular weight tetrablock copolymers|
|US7267855||6 Feb 2003||11 Sep 2007||Kraton Polymers U.S. Llc||Articles prepared from hydrogenated controlled distribution block copolymers|
|US7268184||13 Ene 2003||11 Sep 2007||Kraton Polymers U.S. Llc||Blockcopolymer compositions, having improved mechanical properties and processability and styrenic blockcopolymer to be used in them|
|US7271207||24 Mar 2003||18 Sep 2007||Kraton Polymers U.S. Llc||Bituminous composition|
|US7282536||10 Feb 2005||16 Oct 2007||Kraton Polymers Llc||Block copolymers and method for making same|
|US7290367||25 Dic 2003||6 Nov 2007||Applied Elastomerics, Inc.||Tear resistant gel articles for various uses|
|US7332542||10 Feb 2005||19 Feb 2008||Kraton Polymers U.S. Llc||Block copolymers and method for making same|
|US7439301||1 Mar 2005||21 Oct 2008||Kraton Polymers U.S. Llc||Block copolymers having high flow and high elasticity|
|US7449518||20 Mar 2007||11 Nov 2008||Kraton Polymers U.S. Llc||High temperature block copolymers and process for making same|
|US7517932 *||5 Abr 2006||14 Abr 2009||Kraton Polymers U.S. Llc||Poly(styrene-butadiene-styrene)polymers having a high vinyl content in the butadiene block and hot melt adhesive composition comprising said polymers|
|US7569281||21 Abr 2006||4 Ago 2009||Kraton Polymers U.S. Llc||Flexible packaging laminate films including a block copolymer layer|
|US7576148||9 Nov 2005||18 Ago 2009||Kraton Polymers U.S. Llc||Blown asphalt compositions|
|US7582702||24 Mar 2006||1 Sep 2009||Kraton Polymers U.S. Llc||Block copolymer compositons|
|US7585916||14 Mar 2007||8 Sep 2009||Kraton Polymers Us Llc||Block copolymer compositions|
|US7589152||13 Dic 2004||15 Sep 2009||Kraton Polymers U.S. Llc||Adhesive formulations for novel radial (S-I/B)x polymers|
|US7592390||24 Mar 2006||22 Sep 2009||Kraton Polymers U.S. Llc||Hydrogenated block copolymer compositions|
|US7625851||7 Mar 2007||1 Dic 2009||Kraton Polymers Us Llc||Viscosity index improver for lubricating oils|
|US7625979||4 Jun 2003||1 Dic 2009||Kraton Polymers U.S. Llc||Process for preparing block copolymer and resulting composition|
|US7645507||24 Oct 2005||12 Ene 2010||Kraton Polymers U.S. Llc||Protective films and pressure sensitive adhesives|
|US7714069||22 Sep 2006||11 May 2010||E. I. Du Pont De Nemours And Company||Method of producing adherent coatings on resinous substrates|
|US7737224||20 Jul 2006||15 Jun 2010||Kraton Polymers U.S. Llc||Sulfonated block copolymers, method for making same, and various uses for such block copolymers|
|US7763679||22 Sep 2006||27 Jul 2010||E.I. Du Pont De Nemours And Company||Adherent coating compositions for resinous substrates|
|US7847022||6 Feb 2003||7 Dic 2010||Kraton Polymers U.S. Llc||Articles prepared from controlled distribution block copolymers|
|US7858693||24 Mar 2006||28 Dic 2010||Kratonpolymers U.S. Llc||Unhydrogenated block copolymer compositions|
|US7893159||22 Dic 2006||22 Feb 2011||Dow Global Technologies Inc.||Blends of styrenic block copolymers and propylene-alpha olefin copolymers|
|US7994256||14 Ene 2009||9 Ago 2011||Kraton Polymers U.S. Llc||Gel compositions|
|US8008398||3 Sep 2004||30 Ago 2011||Kraton Polymers U.S. Llc||Foamable polymeric compositions and articles containing foamed compositions|
|US8012539||9 May 2008||6 Sep 2011||Kraton Polymers U.S. Llc||Method for making sulfonated block copolymers, method for making membranes from such block copolymers and membrane structures|
|US8188192||19 Dic 2008||29 May 2012||Kraton Polymers U.S. Llc||Soft elastomeric films|
|US8222346||22 Sep 2004||17 Jul 2012||Dais-Analytic Corp.||Block copolymers and method for making same|
|US8263713||13 Oct 2009||11 Sep 2012||Kraton Polymers U.S. Llc||Amine neutralized sulfonated block copolymers and method for making same|
|US8299177||19 Ene 2011||30 Oct 2012||Kranton Polymers U.S. LLC||Compositions containing styrene-isobutylene-styrene and controlled distribution block copolymers|
|US8349950||11 Mar 2009||8 Ene 2013||Kraton Polymers Us Llc||Miktopolymer compositions|
|US8377514||31 May 2011||19 Feb 2013||Kraton Polymers Us Llc||Sulfonated block copolymer fluid composition for preparing membranes and membrane structures|
|US8377515||19 Jul 2011||19 Feb 2013||Kraton Polymers U.S. Llc||Process for preparing membranes and membrane structures from a sulfonated block copolymer fluid composition|
|US8440304||16 Sep 2008||14 May 2013||Henkel Corporation||Acrylic pressure sensitive adhesive formulation and articles comprising same|
|US8445087||14 Dic 2009||21 May 2013||Kraton Polymers U.S. Llc||Hydrogenated styrenic block copolymers blends with polypropylene|
|US8445631||13 Oct 2009||21 May 2013||Kraton Polymers U.S. Llc||Metal-neutralized sulfonated block copolymers, process for making them and their use|
|US8552114||30 Nov 2012||8 Oct 2013||Kraton Polymers U.S. Llc||Miktopolymer compositions|
|US8580884||11 Nov 2010||12 Nov 2013||Kraton Polymers U.S. Llc||Thermoplastic polyurethane block copolymer compositions|
|US8703860||19 Sep 2012||22 Abr 2014||Kraton Polymers U.S. Llc||Paramethylstyrene block copolymers and their use|
|US9061254||16 Jul 2014||23 Jun 2015||Kraton Polymers U.S. Llc||Block copolymers, their manufacture and their use|
|US20040070187 *||30 Sep 2003||15 Abr 2004||Chen John Y.||Inflatable restraint cushions and other uses|
|US20040072951 *||8 Oct 2003||15 Abr 2004||Hansen David Romme||Photopolymerizable compositions and flexographic plates prepared from controlled distribution block copolymers|
|US20040106705 *||9 Abr 2002||3 Jun 2004||Mulder Evert Alan||Pipe coating|
|US20040138371 *||22 Dic 2003||15 Jul 2004||St. Clair David John||Gels from controlled distribution block copolymers|
|US20040146541 *||25 Dic 2003||29 Jul 2004||Chen John Y.||Tear resistant gel articles for various uses|
|US20040147686 *||19 Dic 2003||29 Jul 2004||Kraton Polymers U.S. Llc||Process for preparing hydrogenated conjugated diene block copolymers|
|US20040254082 *||12 Jun 2003||16 Dic 2004||Bloch Ricardo A.||Viscosity index improver concentrates|
|US20050008669 *||4 Ago 2004||13 Ene 2005||Chen John Y.||Tear resistant gels and articles for every uses|
|US20050107541 *||14 Oct 2004||19 May 2005||Bening Robert C.||Coupled radial anionic polymers|
|US20050137295 *||13 Dic 2004||23 Jun 2005||Kraton Polymers U.S. Llc||Bituminous compositions modified by non-blocking elastomers|
|US20050137312 *||13 Dic 2004||23 Jun 2005||Kraton Polymers U.S. Llc||Adhesive formulations from novel radial (S-I/B)x polymers|
|US20050137346 *||10 Feb 2005||23 Jun 2005||Bening Robert C.||Novel block copolymers and method for making same|
|US20050137347 *||10 Feb 2005||23 Jun 2005||Bening Robert C.||Novel block copolymers and method for making same|
|US20050137348 *||10 Feb 2005||23 Jun 2005||Bening Robert C.||Novel block copolymers and method for making same|
|US20050137349 *||10 Feb 2005||23 Jun 2005||Bening Robert C.||Novel block copolymers and method for making same|
|US20050137350 *||10 Feb 2005||23 Jun 2005||Bening Robert C.||Novel block copolymers and method for making same|
|US20050197465 *||1 Mar 2005||8 Sep 2005||Kraton Polymers U.S. Llc||Block copolymers having high flow and high elasticity|
|US20050215724 *||24 Mar 2005||29 Sep 2005||Kraton Polymers U.S. Llc||Thermoplastic gel compositions that can be converted into thermoset gel compositions by exposure to radiation|
|US20050215725 *||25 Mar 2005||29 Sep 2005||Kraton Polymers U.S. Llc||Thermoplastic gel compositions that can be converted into thermoset gel compositions by exposure to radiation|
|US20050222305 *||24 Mar 2003||6 Oct 2005||Trommelen Erik A||Bituminous composition|
|US20050222340 *||31 Mar 2005||6 Oct 2005||Kraton Polymers U.S. Llc||Process for the prevention or restriction of oil spills|
|US20050222356 *||13 Ene 2003||6 Oct 2005||Gert Joly||Block copolymer compositions, having improved mechanical properties and processability|
|US20050239930 *||27 Abr 2004||27 Oct 2005||Kraton Polymers U.S. Llc||Photocurable compositions and flexographic printing plates comprising the same|
|US20050256265 *||11 May 2004||17 Nov 2005||Wright Kathryn J||Articles prepared from high molecular weight tetrablock copolymers|
|US20060030665 *||13 Ene 2003||9 Feb 2006||Gert Joly||Blockcopolymer compositions, having improved mechanical properties and processability and styrenic blockcopolymer to be used in them|
|USH1405 *||9 Abr 1992||3 Ene 1995||Shell Oil Company||Epoxy resin composition|
|USH1438 *||18 Dic 1992||2 May 1995||Shell Oil Company||Modified block copolymers functionalized in the monoalkenyl aromatic or vinylarene block|
|USH1949||1 Feb 1996||6 Mar 2001||Shell Oil Company||Hydrogenated elastomer primed polyolefin film|
|USH1956||8 Jun 1998||3 Abr 2001||Shell Oil Company||Enhanced hydrogenation catalyst removal from block copolymers by reduction in polymer cement viscosity by increasing the vinyl content of the block copolymers|
|USH2100||9 Jul 1997||6 Abr 2004||Kraton Polymers Llc||Low stress relaxation adhesive having high molecular weight endblock copolymer|
|USRE39559 *||5 Sep 2003||10 Abr 2007||Kraton Polymer Us L.L.C.||Butadiene polymers having terminal functional groups|
|USRE39617||5 Sep 2003||8 May 2007||Kraton Polymers Us Llc||Butadiene polymers having terminal functional groups|
|EP0254346A2 *||7 Jul 1987||27 Ene 1988||Shell Internationale Research Maatschappij B.V.||Thermoplastic compositions and process for the preparation thereof|
|EP0684267A1||22 May 1995||29 Nov 1995||Shell Internationale Research Maatschappij B.V.||A method for producing asymmetric radial polymers|
|EP0690082A2||30 Jun 1995||3 Ene 1996||Shell Internationale Research Maatschappij B.V.||Star polymer viscosity index improver for oil lubricating compositions|
|EP0697247A2||14 Jul 1995||21 Feb 1996||Shell Internationale Research Maatschappij B.V.||Process for the conversion of hydrocarbonaceous feedstock|
|EP0698626A1||10 Ago 1995||28 Feb 1996||Shell Internationale Research Maatschappij B.V.||Asymmetric triblock copolymer, viscosity index improver for oil compositions|
|EP0698638A1||14 Jul 1995||28 Feb 1996||Shell Internationale Research Maatschappij B.V.||Crosslinkable waterborne dispersions of hydroxy functional polydiene polymers and amino resins|
|EP0700942A2||4 Sep 1995||13 Mar 1996||Shell Internationale Research Maatschappij B.V.||Star polymer viscosity index improver for lubricating oil compositions|
|EP0709416A2||26 Sep 1995||1 May 1996||Shell Internationale Research Maatschappij B.V.||Polyurethane sealants and adhesives containing saturated hydrocarbon polyols|
|EP0711795A1||6 Nov 1995||15 May 1996||Shell Internationale Research Maatschappij B.V.||Low viscosity adhesive compositions containing asymmetric radial polymers|
|EP0712892A1||14 Nov 1995||22 May 1996||Shell Internationale Research Maatschappij B.V.||Blends of block copolymers and metallocene polyolefins|
|EP0771641A2||31 Oct 1996||7 May 1997||Shell Internationale Research Maatschappij B.V.||Process to prepare a blown film of a block copolymer composition|
|EP0781605A1||18 Dic 1996||2 Jul 1997||Shell Internationale Research Maatschappij B.V.||Removal of metal compounds from an acid solution|
|EP0781782A1||18 Dic 1996||2 Jul 1997||Shell Internationale Research Maatschappij B.V.||Removal of alkali metal compounds from polymer cements|
|EP0781784A1||18 Dic 1996||2 Jul 1997||Shell Internationale Research Maatschappij B.V.||Removal of an alkali metal compound from a polymer cement|
|EP1493800A1||8 Jun 2004||5 Ene 2005||Infineum International Limited||Viscosity index improvers for lubricating oil compositions|
|EP2083063A1||14 Ene 2009||29 Jul 2009||Infineum International Limited||Lubricating oil composition|
|EP2428534A1||1 Mar 2005||14 Mar 2012||Kraton Polymers US LLC||Elastomeric bicomponent fibers comprising block copolymers having high flow|
|EP2586803A1||1 Mar 2005||1 May 2013||Kraton Polymers US LLC||Block copolymers having high flow and high elasticity|
|EP2607466A2||20 Dic 2012||26 Jun 2013||Infineum International Limited||Viscosity index improvers for lubricating oil compositions|
|EP2712808A1||20 Oct 2008||2 Abr 2014||Lord Corporation||Suspension system for aircraft auxiliary power unit with elastomeric member|
|EP2712809A1||20 Oct 2008||2 Abr 2014||Lord Corporation||Suspension system for aircraft auxilliary power unit with elastomeric member|
|EP2784096A1||17 Sep 2010||1 Oct 2014||Kraton Polymers US LLC||Process for stabilizing and storing a polar component|
|WO1999005185A1 *||20 Jul 1998||4 Feb 1999||Shell Int Research||Enhanced hydrogenation catalyst removal from block copolymers by reduction in polymer cement viscosity by increasing the vinyl content of the block copolymers|
|WO2004106399A2||5 May 2004||9 Dic 2004||Kraton Polymers Res Bv||Process for making a coupled block copolymer compositon|
|WO2004108784A1||3 Jun 2004||16 Dic 2004||Kraton Polymers Res Bv||Articles prepared from hydrogenated block copolymers|
|WO2005092979A1||1 Mar 2005||6 Oct 2005||Kraton Polymers Res Bv||Elastomeric bicomponent fibers comprising block copolymers having high flow|
|WO2007000191A1||20 Dic 2005||4 Ene 2007||Kraton Polymers Res Bv||High melt strength thermoplastic elastomer composition|
|WO2007010039A1||21 Jul 2006||25 Ene 2007||Kraton Polymers Res Bv||Sulfonated block copolymers, method for making same, and various uses for such block copolymers|
|WO2007106346A2||7 Mar 2007||20 Sep 2007||Kraton Polymers Us Llc||Viscosity index improver for lubricating oils|
|WO2007111849A2||16 Mar 2007||4 Oct 2007||Robert C Bening||Novel block copolymer compositions|
|WO2007111852A2||16 Mar 2007||4 Oct 2007||Dale L Handlin||Novel unhydrogenated block copolymer compositions|
|WO2007111853A2||16 Mar 2007||4 Oct 2007||Kraton Polymers Us Llc||Novel hydrogenated block copolymer compositions|
|WO2009082685A1||19 Dic 2008||2 Jul 2009||Kraton Polymers Us Llc||Soft elastomeric films|
|WO2010077799A1||14 Dic 2009||8 Jul 2010||Kraton Polymers Us Llc||Hydrogenated styrenic block copolymers blends with polypropylene|
|WO2011133488A1||19 Abr 2011||27 Oct 2011||Kraton Polymers U.S. Llc||High tensile strength article with elastomeric layer|
|WO2012050740A1||19 Sep 2011||19 Abr 2012||Kraton Polymers U.S. Llc||Elastic, moisture-vapor permeable films, their preparation and their use|
|WO2012050860A1||28 Sep 2011||19 Abr 2012||Kraton Polymers U.S. Llc||Energy recovery ventilation sulfonated block copolymer laminate membrane|
|WO2012054325A1||14 Oct 2011||26 Abr 2012||Kraton Polymers U.S. Llc||Method for producing a sulfonated block copolymer composition|
|WO2014087814A1||12 Nov 2013||12 Jun 2014||Kraton Polymers U.S. Llc||Adhesive composition for protective film of coated surface and method for preparing same|
|WO2014087815A1||12 Nov 2013||12 Jun 2014||Kraton Polymers U.S. Llc||Adhesive composition for protective film of coated surface and method for preparing same|
|Clasificación de EE.UU.||525/272, 525/258, 525/314, 525/261, 525/259, 525/914, 525/339|