WO1993012180A1 - Polymer composition comprising a semicrystalline matrix, a filler and a third material - Google Patents

Polymer composition comprising a semicrystalline matrix, a filler and a third material Download PDF

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Publication number
WO1993012180A1
WO1993012180A1 PCT/NL1992/000223 NL9200223W WO9312180A1 WO 1993012180 A1 WO1993012180 A1 WO 1993012180A1 NL 9200223 W NL9200223 W NL 9200223W WO 9312180 A1 WO9312180 A1 WO 9312180A1
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Prior art keywords
polymer composition
filler
polymer
tan
frequency
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PCT/NL1992/000223
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French (fr)
Inventor
Franciscus Hubertus Jacobus Maurer
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Dsm N.V.
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Publication of WO1993012180A1 publication Critical patent/WO1993012180A1/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/10—Peculiar tacticity
    • C08L2207/14—Amorphous or atactic polypropylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof

Definitions

  • the invention relates to a polymer composition
  • a polymer composition comprising a semicrystalline polymer matrix, a filler and a third material.
  • Polymer compositions containing both a dispersed filler and a dispersed rubber-like third material are known. Such a polymer composition is known from, inter alia,
  • a semicrystalline matrix such as polypropylene
  • a disperse phase of a third material such as an
  • That polymer composition has good damping properties, but it has the disadvantage of a low modulus.
  • module' is understood to mean the storage modulus (G').
  • the modulus of a polymer composition is determined by sinusoidal deformation of the polymer composition at a certain temperature and with a certain frequency (ASTM D 4065-82). The moduli are dependent on the temperature and the frequency of the sinusoidal deformation.
  • the elastic modulus in shear (G') is a measure of the rigidity of the polymer composition.
  • the loss modulus in shear (G") is a measure of the energy dissipated per cycle.
  • Tan ⁇ (the loss factor) is a measure of the damping properties of a polymer composition and is defined by the ratio of the loss modulus (G") to the storage modulus (G'): G"
  • the object of the invention is to provide a polymer composition which has a high modulus and in addition
  • the invention is characterized in that the third material is present substantially as interphase in the polymer composition, and that the polymer composition has a tan ⁇ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -5°C to 25°C, measured at a frequency of 0.2 Hz.
  • G' modulus
  • interphase' is understood to mean a layer which is present between the filler particles and the polymer matrix.
  • the polymer composition also has a tan ⁇ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -15°C to -5°C, measured at a frequency of 0.2 Hz.
  • G' modulus
  • composition also has a tan ⁇ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -25°C to -15°C, measured at a frequency of 0.2 Hz.
  • Such a polymer composition can be obtained when 5 vol.-% or more of the third material is present in the polymer composition and the third material has a tan ⁇ higher than 0.1 over a 50°C broad temperature range between -40°C and 50°C, measured at a frequency of 0.2 Hz.
  • the third material has a tan ⁇ higher than 0.1 over a 50°C broad temperature range between -20°C and 50°C measured at a frequency of 0.2 Hz.
  • the third material has a tan ⁇ higher than 0.1 over a 50°C broad temperature range between -10°C and 50°C measured at a frequency of 0.2 Hz.
  • the third material which should be substantially present as interphase in the polymer composition, can be any material.
  • HDPE high-polyethylene
  • LDPE low density polyethylene
  • VLDPE low density polyethylene
  • PVC polyvinylchloride
  • IPN's interpenetrating polymer networks
  • IPN interpenetrating polymer networks
  • the polymer composition generally contains 5-30 vol.-% of the third material.
  • the polymer matrix comprises a semicrystalline polymer and has a crystallinity which is generally between 25 and 85% (determined by means of DSC).
  • the polymer matrix can consist of, for instance, a polyamide (such as polyamide 6, polyamide 6,6 and polyamide 4,6) a polyolefin (such as polypropylene, polyethylene (LD and HD)), polyethyleneterephthalate, polybutyleneterephthalate, polyacrylonitrile, polyvinylacetate,
  • a polyamide such as polyamide 6, polyamide 6,6 and polyamide 4,6
  • a polyolefin such as polypropylene, polyethylene (LD and HD)
  • polyethyleneterephthalate such as polyethylene (LD and HD)
  • polybutyleneterephthalate such as polyacrylonitrile
  • polyvinylacetate such as polyvinylacetate
  • the polymer matrix consists of a polyolefin comprised of
  • polystyrene resin such as polyethylene, polypropylene, an ethylene/propylene copolymer or mixtures thereof.
  • Semicrystalline polymers containing a filler can also be used as polymer matrix.
  • the polymer matrix can be filled and reinforced with the fillers as described below.
  • fillers can be used all known inorganic fillers, such as the metals from groups 2-13 of the Periodic System (e.g. Fe, Cu, Mg, Ca, Zn, Ba, Al, Ti) and silicon and the oxides, hydroxides, carbonates, sulphates, silicates and sulphites of these metal elements and several clay minerals containing some of these compounds.
  • the metals from groups 2-13 of the Periodic System e.g. Fe, Cu, Mg, Ca, Zn, Ba, Al, Ti
  • silicon silicon
  • Specific examples are iron oxide, zinc oxide, titanium oxide, alumina, silica.
  • aluminium hydroxide magnesium hydroxide, calcium hydroxide, magnesium carbonate, calcium carbonate, barium sulphate, calcium sulphate, sodium sulphate, calcium sulphite, calcium silicate, clay, wollastonite, glass granules, glass powders, glass fibres, silica sand, silica brick, quartz powder, volcanic pumice, diatomaceous earth, bone black, iron powder and aluminium powder.
  • These fillers can also be used as mixtures.
  • inorganic fillers can also be used after having been treated with a compound which modifies the surface of the filler particles.
  • examples of such compounds are:
  • esters and salts such as e.g stearic acid, oleic acid, palmitic acid, calcium stearate, magnesium stearate, aluminium stearate, stearamide, ethyl stearate, methyl stearate, calcium oleate, oleinamide, ethyl oleate, calcium palmitate, palmitamide and ethyl palmitate,
  • silane compounds such as e.g. vinyl trimethoxy silane, vinyl triethoxy silane, vinyl triacetoxy silane,
  • titanium compounds such as e.g. isopropyltriisostearoyl titanate and isopropyltridiisooctylphosphonate titanate.
  • Another widely used method for modifying the surface of the filler particles is to pulverize the
  • inorganic filler in the presence of an unsaturated organic acid or the ester thereof (e.g. acrylic acid, methacrylic acid, methyl methacrylate, ethyl acrylate, etc.).
  • unsaturated organic acid or the ester thereof e.g. acrylic acid, methacrylic acid, methyl methacrylate, ethyl acrylate, etc.
  • Organic fillers such as wood fibres and cellulose, can also be used.
  • fillers which are more or less spherical are used.
  • barium sulphate is used as filler.
  • the polymer composition generally contains 3 to 50 vol.% of the filler.
  • the polymer compositions can be prepared by mixing the polymer matrix, the filler and the third material.
  • the third material should not, or hardly, be miscible with the polymer matrix
  • the third material should have affinity to the filler.
  • the result of this requirements is that the third material forms a skin around the filler during the mixing.
  • a mixture of the filler and the third material can be formed by first melting the third material and mixing it with the filler or by dissolving the third material in a solvent, mixing this solvent with the filler and
  • the mixture of the filler and the third material is subsequently mixed with the polymer matrix, after which the final product can be moulded by compression above the melting temperature of the polymer matrix.
  • the polymer compositions are preferably prepared by mixing the three components in one mixing step.
  • the polymer composition according to the invention can further contain the usual additives, such as stabilizer and colorants.
  • the polymer compositions can be used for the following reasons.
  • the components constituting the polymer compositions are:
  • HDPE High density polyethylene
  • the filler in the polymer matrix is:
  • Glass fibre Silenka R , type 8044, length 4mm; the glass fibr were freed of the coating before mixing into the matrix.
  • Atactic polypropylene rubber DSM Stamyroid 33C R
  • Ethylene vinyl acetate (EVA): Dupon Elvax 660 R with 13% vinyl acetate.
  • Polymer compositions were prepared in the following way:
  • Oil in the form of a 10% solution in decalin was added dropwise to BaSO 4 with stirring, at room temperature.
  • the tan ⁇ of the oil at 0.2 Hz at a temperature of -40°C, 0°C and 50°C was respectively ⁇ , ⁇ and ⁇ .
  • the resulting mixture was dried at 30°C under vacuum, after which the dried powder obtained was mixed into the ethylene-propylene block
  • Atactic polypropylene rubber was dissolved in decalin at a temperature of 80°C. Then talcum respectively BaS0 4 was added.
  • the tan ⁇ of the atactic polypropylene rubber at 0.2 Hz at a temperature of -40°C, 0°C and 50°C was
  • the polymer compositions were prepared in a 3 l
  • the ethylene-propylene blockcopolymer or the polypropylene homopolymer, the talcum and the ethylene vinyl acetate were added, with a die-pressure of 5 bar to the Farrel
  • the amount charged to the batchkneader depends on the amount of filler present in the polymer composition. When the amount of filler is 17.8 vol% the charge amount is 3.2 kg; when the amount of filler is 24.6 vol% the charge amount 3.4 kg.

Abstract

Polymer composition comprising a polymer matrix, a filler and a third material. The third material is present substantially as interphase in the polymer composition, and the polymer composition has a tan δ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -5 °C to 25 °C, at a frequency of 0.2 Hz.

Description

POLYMER COMPOSITION COMPRISING A SEMICRYSTALLINE MATRIX, A FILLER AND A THIRD MATERIAL
The invention relates to a polymer composition comprising a semicrystalline polymer matrix, a filler and a third material.
Polymer compositions containing both a dispersed filler and a dispersed rubber-like third material are known. Such a polymer composition is known from, inter alia,
US-4,433,073, which describes polymer compositions
comprising a semicrystalline matrix, such as polypropylene, a disperse phase of a third material, such as an
ethylene/propylene copolymer rubber, and an inorganic filler, such as calcium carbonate, present in the disperse phase. That polymer composition has good damping properties, but it has the disadvantage of a low modulus.
Here and in the following the term 'modulus' is understood to mean the storage modulus (G').
The modulus of a polymer composition is determined by sinusoidal deformation of the polymer composition at a certain temperature and with a certain frequency (ASTM D 4065-82). The moduli are dependent on the temperature and the frequency of the sinusoidal deformation. The elastic modulus in shear (G') is a measure of the rigidity of the polymer composition. The loss modulus in shear (G") is a measure of the energy dissipated per cycle.
Tan δ (the loss factor) is a measure of the damping properties of a polymer composition and is defined by the ratio of the loss modulus (G") to the storage modulus (G'): G"
tan δ = - - -
G' The object of the invention is to provide a polymer composition which has a high modulus and in addition
possesses good damping properties over a wide temperature range.
The invention is characterized in that the third material is present substantially as interphase in the polymer composition, and that the polymer composition has a tan δ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -5°C to 25°C, measured at a frequency of 0.2 Hz. Such polymer compositions are not know in the prior art.
Here and in the following the term 'interphase' is understood to mean a layer which is present between the filler particles and the polymer matrix.
Preferably, the polymer composition also has a tan δ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -15°C to -5°C, measured at a frequency of 0.2 Hz.
Particularly preferentially, the polymer
composition also has a tan δ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -25°C to -15°C, measured at a frequency of 0.2 Hz.
Such a polymer composition can be obtained when 5 vol.-% or more of the third material is present in the polymer composition and the third material has a tan δ higher than 0.1 over a 50°C broad temperature range between -40°C and 50°C, measured at a frequency of 0.2 Hz.
Preferably, the third material has a tan δ higher than 0.1 over a 50°C broad temperature range between -20°C and 50°C measured at a frequency of 0.2 Hz. Particularly preferentially, the third material has a tan δ higher than 0.1 over a 50°C broad temperature range between -10°C and 50°C measured at a frequency of 0.2 Hz.
The third material, which should be substantially present as interphase in the polymer composition, can
consist of, inter alia,
- mineral or organic oils. - a mixture of starch and glycol,
- polyethylene (HDPE, LDPE, VLDPE),
- chlorinated polyethylene, polypropylene, or
ethylene/propylene copolymer,
- acrylic acid or maleic anhydride modified polyethylene, polypropylene or ethylene/propylene copolymer,
- ethylene-vinyl acetate,
- plasticized polyvinylchloride (PVC) with a wide glass transition regime,
- interpenetrating polymer networks (IPN's), such as polyurethane/poly(methylmethacrylate) IPN, and mixtures of these compounds.
The polymer composition generally contains 5-30 vol.-% of the third material.
The polymer matrix comprises a semicrystalline polymer and has a crystallinity which is generally between 25 and 85% (determined by means of DSC).
The polymer matrix can consist of, for instance, a polyamide (such as polyamide 6, polyamide 6,6 and polyamide 4,6) a polyolefin (such as polypropylene, polyethylene (LD and HD)), polyethyleneterephthalate, polybutyleneterephthalate, polyacrylonitrile, polyvinylacetate,
polyvinylalcohol, liquid crystalline polymer (LCP) and mixtures of these semicrystalline polymers. Preferably, the polymer matrix consists of a polyolefin comprised of
monomers with 2-6 carbon atoms, such as polyethylene, polypropylene, an ethylene/propylene copolymer or mixtures thereof. Semicrystalline polymers containing a filler can also be used as polymer matrix. The polymer matrix can be filled and reinforced with the fillers as described below.
As fillers can be used all known inorganic fillers, such as the metals from groups 2-13 of the Periodic System (e.g. Fe, Cu, Mg, Ca, Zn, Ba, Al, Ti) and silicon and the oxides, hydroxides, carbonates, sulphates, silicates and sulphites of these metal elements and several clay minerals containing some of these compounds. Specific examples are iron oxide, zinc oxide, titanium oxide, alumina, silica. aluminium hydroxide, magnesium hydroxide, calcium hydroxide, magnesium carbonate, calcium carbonate, barium sulphate, calcium sulphate, sodium sulphate, calcium sulphite, calcium silicate, clay, wollastonite, glass granules, glass powders, glass fibres, silica sand, silica brick, quartz powder, volcanic pumice, diatomaceous earth, bone black, iron powder and aluminium powder. These fillers can also be used as mixtures.
These inorganic fillers can also be used after having been treated with a compound which modifies the surface of the filler particles. Examples of such compounds are:
- higher fatty acids or derivatives thereof, such as esters and salts, such as e.g stearic acid, oleic acid, palmitic acid, calcium stearate, magnesium stearate, aluminium stearate, stearamide, ethyl stearate, methyl stearate, calcium oleate, oleinamide, ethyl oleate, calcium palmitate, palmitamide and ethyl palmitate,
- silane compounds, such as e.g. vinyl trimethoxy silane, vinyl triethoxy silane, vinyl triacetoxy silane,
γ-chloropropyl trimethoxysilane, γ-aminopropyl trimethoxy silane and γ-metacryloxypropyl trimethoxysilane, and
- titanium compounds, such as e.g. isopropyltriisostearoyl titanate and isopropyltridiisooctylphosphonate titanate.
Another widely used method for modifying the surface of the filler particles is to pulverize the
inorganic filler in the presence of an unsaturated organic acid or the ester thereof (e.g. acrylic acid, methacrylic acid, methyl methacrylate, ethyl acrylate, etc.).
Organic fillers, such as wood fibres and cellulose, can also be used.
Preferably, fillers which are more or less spherical are used.
Particularly preferentially, barium sulphate is used as filler.
The polymer composition generally contains 3 to 50 vol.% of the filler. The polymer compositions can be prepared by mixing the polymer matrix, the filler and the third material.
The components should satisfy the following requirements:
- the third material should not, or hardly, be miscible with the polymer matrix, and
- the third material should have affinity to the filler. The result of this requirements is that the third material forms a skin around the filler during the mixing.
A mixture of the filler and the third material can be formed by first melting the third material and mixing it with the filler or by dissolving the third material in a solvent, mixing this solvent with the filler and
subsequently evaporating the solvent. The mixture of the filler and the third material is subsequently mixed with the polymer matrix, after which the final product can be moulded by compression above the melting temperature of the polymer matrix.
The polymer compositions are preferably prepared by mixing the three components in one mixing step.
The polymer composition according to the invention can further contain the usual additives, such as stabilizer and colorants.
The polymer compositions can be used for
applications requiring good damping in addition to high rigidity of the polymer compositions, for instance in components for motorcars and in housings for electrical equipment.
The invention is further illustrated with the aid of the following examples, without being restricted thereto. Enclosure
Examples
Rheometrics equipment was used to determine the modulus of elasticity and ta measurements were performed in accordance with ASTM D 4065-82 (frequency 0.2 Hz).
The components constituting the polymer compositions are:
Polymer matrix:
Polypropylene-Homopolymer (PP1):
DSM Stanylan P 13E10R
Ethylene-propylene block copolymer (PP2) :
DSM Stamylan P 19 MN 10R
Ethylene-propylene block copolymer (PP3) :
DSM Stamylan P PHC 23R
High density polyethylene (HDPE) :
DSM Stamylan 9089 FR
The filler in the polymer matrix is:
Glass fibre: SilenkaR, type 8044, length 4mm; the glass fibr were freed of the coating before mixing into the matrix.
Third material:
Atactic polypropylene rubber: DSM Stamyroid 33CR
Oil: Sunpar 2280R
Ethylene vinyl acetate (EVA): Dupon Elvax 660R with 13% vinyl acetate.
Filler:
Barium sulphate: Saechtleben K4R with a specific surface of
0.4 m2/g;
Talcum: Lusenac OOSR Examples I-VII
Polymer compositions were prepared in the following way:
Oil in the form of a 10% solution in decalin was added dropwise to BaSO4 with stirring, at room temperature. The tan δ of the oil at 0.2 Hz at a temperature of -40°C, 0°C and 50°C was respectively ∞, ∞ and ∞. The resulting mixture was dried at 30°C under vacuum, after which the dried powder obtained was mixed into the ethylene-propylene block
copolymer or the polyethylene. Next, plates were compression moulded out of the samples and thereafter the plates were cooled. The ethylene-polypropylene blockcopolymer containing samples were compression moulded at 190°C, the polyethylene- containing samples at 180°C. The cooling rate was about 40°C/min.
Atactic polypropylene rubber was dissolved in decalin at a temperature of 80°C. Then talcum respectively BaS04 was added.
The tan δ of the atactic polypropylene rubber at 0.2 Hz at a temperature of -40°C, 0°C and 50°C was
respectively 0.17, 0.21 and 0.30.
After drying under vacuum the powder obtained was mixed into polypropylene, which had or had not been
previously mixed with glass fibres. Plates were compression moulded out of the samples as described above.
Examples VIII-X
The polymer compositions were prepared in a 3 l
Farrel batchkneader in the following way:
The ethylene-propylene blockcopolymer or the polypropylene homopolymer, the talcum and the ethylene vinyl acetate were added, with a die-pressure of 5 bar to the Farrel
batchkneader. The jacket temperature was 100°C. The speed was kept at 160 rpm till 1 minute after the gel-point of the mixture was reached. Thereafter the speed was reduced to 120 rpm and the kneading was continued for three more minutes. The amount charged to the batchkneader depends on the amount of filler present in the polymer composition. When the amount of filler is 17.8 vol% the charge amount is 3.2 kg; when the amount of filler is 24.6 vol% the charge amount 3.4 kg.
After the kneading was completed, plates were compression moulded out of the samples at 190°C and thereafter the plates were cooled. The cooling rate was about 40°C/min.
Figure imgf000011_0001

Claims

C L A I M S
1. Polymer composition comprising a polymer matrix, a
filler and a third material, characterized in that the third material is present substantially as interphase in the polymer composition, and that the polymer composition has a tan δ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -5°C to 25°C measured at a frequency of 0.2 Hz (all according to ASTM 4065/82).
2. Polymer composition according to claim 1, characterized in that the polymer composition also has a tan δ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -15°C to -5°C, measured at a frequency of 0.2 Hz.
3. Polymer composition according to claim 2, characterized in that the polymer composition also has a tan δ higher than 0.07 and a modulus (G') higher than 0.4 GPa in a temperature range from -25°C to -15°C, measured at a frequency of 0.2 Hz.
4. Polymer composition according to any of claims 1-3,
characterized in that 5 vol.-% or more of the third material is present in the polymer composition and the third material has a tan δ higher than 0.1 over a 50°C broad temperature range between -40°C and 50°C measured at a frequency of 0.2 Hz.
5. Polymer composition according to claim 4, characterized in that the third material also has a tan δ higher than 0.1 over a 50°C broad temperature range between -20°C and 50°C, measured at a frequency of 0.2 Hz.
6. Polymer composition according to claim 5, characterized in that the third material also has a tan δ higher than 0.1 over a 50°C broad temperature range between -10°C and 50°C, measured at a frequency of 0.2 Hz.
7. Polymer composition according to any one of claims 1-6, characterized in that the polymer composition contains 5-30 vol.% of the third material.
8. Process whereby a polymer composition according to any one of claims 1-7 is obtained, characterized in that the polymer matrix, the filler and the third material are mixed in one mixing step.
9. Products obtained by processing of at least one polymer composition according to any one of claims 1-9.
10. Polymer compositions and products as substantially
described in the specification and/or the examples.
PCT/NL1992/000223 1991-12-12 1992-12-11 Polymer composition comprising a semicrystalline matrix, a filler and a third material WO1993012180A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9102077 1991-12-12
NL9102077A NL9102077A (en) 1991-12-12 1991-12-12 POLYMER COMPOSITION INCLUDING A SEMICRISTALLINE MATRIX, A FILLER AND A SECOND MATERIAL.

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PCT/NL1992/000223 WO1993012180A1 (en) 1991-12-12 1992-12-11 Polymer composition comprising a semicrystalline matrix, a filler and a third material

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994028948A1 (en) * 1993-06-07 1994-12-22 Lenzing Aktiengesellschaft Plastic mixture containing barium sulphate for the absorption of x-rays
GB2285981A (en) * 1994-01-27 1995-08-02 Sheffield Orthodontic Lab Limi Polymer material for the production of medical artifacts
EP0972803A1 (en) * 1998-07-15 2000-01-19 Sumitomo Wiring Systems, Ltd. Flame-and wear-resisting resin compositions

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Publication number Priority date Publication date Assignee Title
EP0202430A1 (en) * 1985-03-26 1986-11-26 Mitsubishi Petrochemical Co., Ltd. Inorganic filler-containing polyolefin resin compositions
US4822834A (en) * 1988-04-19 1989-04-18 The United States Of America As Represented By The Secretary Of The Air Force Vibration damping composition suitable for outer space temperature variations
EP0426482A2 (en) * 1989-11-01 1991-05-08 Polyplastics Co. Ltd. Filled thermoplastic resin compositions having an interpenetrating phase forming a three-dimensional network structure and melt-blending methods for forming the same
JPH03223356A (en) * 1990-01-30 1991-10-02 Idemitsu Petrochem Co Ltd Polyolefin resin composition

Patent Citations (4)

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EP0202430A1 (en) * 1985-03-26 1986-11-26 Mitsubishi Petrochemical Co., Ltd. Inorganic filler-containing polyolefin resin compositions
US4822834A (en) * 1988-04-19 1989-04-18 The United States Of America As Represented By The Secretary Of The Air Force Vibration damping composition suitable for outer space temperature variations
EP0426482A2 (en) * 1989-11-01 1991-05-08 Polyplastics Co. Ltd. Filled thermoplastic resin compositions having an interpenetrating phase forming a three-dimensional network structure and melt-blending methods for forming the same
JPH03223356A (en) * 1990-01-30 1991-10-02 Idemitsu Petrochem Co Ltd Polyolefin resin composition

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Title
CHEMICAL ABSTRACTS, vol. 112, no. 6, 5 February 1990, Columbus, Ohio, US; abstract no. 37358e, NAKAMURA TADAYOSHI 'HEAT-RESISTANT VIBRATION-DAMPING AROMATIC NYLON COMPOSITIONS' page 66 ; *
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994028948A1 (en) * 1993-06-07 1994-12-22 Lenzing Aktiengesellschaft Plastic mixture containing barium sulphate for the absorption of x-rays
GB2285981A (en) * 1994-01-27 1995-08-02 Sheffield Orthodontic Lab Limi Polymer material for the production of medical artifacts
EP0972803A1 (en) * 1998-07-15 2000-01-19 Sumitomo Wiring Systems, Ltd. Flame-and wear-resisting resin compositions

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