CA2631126A1 - Comminutable polyesters - Google Patents

Comminutable polyesters Download PDF

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Publication number
CA2631126A1
CA2631126A1 CA002631126A CA2631126A CA2631126A1 CA 2631126 A1 CA2631126 A1 CA 2631126A1 CA 002631126 A CA002631126 A CA 002631126A CA 2631126 A CA2631126 A CA 2631126A CA 2631126 A1 CA2631126 A1 CA 2631126A1
Authority
CA
Canada
Prior art keywords
polyester
process according
acid
ester
amide bonds
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002631126A
Other languages
French (fr)
Other versions
CA2631126C (en
Inventor
Ralph Edmund Harris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cleansorb Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2631126A1 publication Critical patent/CA2631126A1/en
Application granted granted Critical
Publication of CA2631126C publication Critical patent/CA2631126C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/91—Polymers modified by chemical after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • C08J7/123—Treatment by wave energy or particle radiation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers

Abstract

A process is disclosed for producing a polyester in powder form, which process comprises: (a) rendering a polyester comminutable by (i) chemical pre-treatment of the polyester, or (ii) irradiating the polyester; and (b) comminuting the polyester produced in step (a) to form a powder.

Claims (18)

1. A process for producing a polyester in powder form, the polyester being derived from one or more of lactic acid, glycolic acid, lactide, glycolide and caprolactone, which process comprises;

(a) rendering a polyester comminutable by (i) chemically pre-treating the polyester such that cross-linking results, or (ii) irradiating the polyester using an irradiation source selected from a gamma radiation source and X -rays; and (b) comminuting the polyester produced in step (a) to form a powder.
2. A process according to claim 1 which comprises, in step (a), both (i) chemically pre-treating the polyester, and (ii) irradiating the polyester.
3. A process according to Claim 1 or 2 wherein the chemical pre-treatment that results in cross-linking is a treatment which comprises reacting the polyester with one or more molecules which are each capable of forming 3 or more ester and/or amide bonds.
4. A process according to Claim 3 which comprises reacting the polyester with one or more of a polyol, polycarboxylic acid, polyhydroxycarboxylic acid, polyamine or polyamino acid.
5. A process according to Claim 3 or 4 which comprises reacting the polyester with one or more of glycerol, sorbitol, polyvinyl alcohol, pentaerythritol or citric acid.
6. A process according to any one of the preceding claims wherein the chemical pre-treatment involves the use of an initiator.
7. A process according to Claim 6 wherein the initiator is an hydroperoxide, alkyl perester, peroxide, organic polyoxide, azo compound, persulphate or percarbonate.
8. A process according to any one of the preceding claims, wherein the gamma radiation source is a cobalt source.
9 9. A process according to any one of the preceding claims which comprises, in step (a)(ii), irradiating the polyester with a radiation dose which is sufficient to render the polyester comminutable.
10. A process according to any one of the preceding claims wherein, in step (a) (ii), the radiation dose is within the range of from about 300 kGy to 700 kGy.
11. A process according to any one of the preceding claims wherein the polyester is a copolymer derived from one or more of lactic acid, glycolic acid, lactide, glycolide and caprolactone and a compound capable of forming 3 or more ester and/or amide bonds.
12. A process according to claim 11 wherein the compound capable of forming 3 or more ester and/or amide bonds is a polyol, polycarboxylic acid, polyhydroxycarboxylic acid, polyamine or polyamino acid.
13. A polyester according to claim 12 wherein the compound capable of forming 3 or more ester and/or amide bonds is glycerol, sorbitol, polyvinyl alcohol, pentaerythritol or citric acid.
14. A process according to any one of the preceding claims, which further comprises incorporating one or more other chemicals into the polyester by dissolution or dispersion.
15. A process according to any one of the preceding claims, which comprises comminuting the polyester by milling, grinding, crushing or attrition, or by a cutting process.
16. A polyester in powder form which is obtainable by a process as defined in any one of the preceding claims.
17. An oilfield treatment composition which comprises a polyester in powder form as defined in claim 16.
18. A process according to any one of claims 1 to 15 which further comprises formulating the resulting polyester in powder form into an oilfield treatment composition.
CA2631126A 2005-11-28 2006-11-28 Comminutable polyesters Active CA2631126C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0524196.3 2005-11-28
GBGB0524196.3A GB0524196D0 (en) 2005-11-28 2005-11-28 Comminutable polyesters
PCT/GB2006/004432 WO2007060470A1 (en) 2005-11-28 2006-11-28 Comminutable polyesters

Publications (2)

Publication Number Publication Date
CA2631126A1 true CA2631126A1 (en) 2007-05-31
CA2631126C CA2631126C (en) 2012-08-21

Family

ID=35601357

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2631126A Active CA2631126C (en) 2005-11-28 2006-11-28 Comminutable polyesters

Country Status (4)

Country Link
US (1) US8101675B2 (en)
CA (1) CA2631126C (en)
GB (2) GB0524196D0 (en)
WO (1) WO2007060470A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2970713B1 (en) * 2011-01-20 2014-04-25 Arkema France BIORESSOURCE ALIPHATIC POLYESTER FINE POWDER AND PROCESS FOR PRODUCING SUCH POWDER
WO2014078720A1 (en) * 2012-11-15 2014-05-22 Rusi Taleyarkhan Polylactic acid adhesive compositions and methods for their preparation and use

Family Cites Families (27)

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Publication number Priority date Publication date Assignee Title
US2362511A (en) * 1939-11-21 1944-11-14 Du Pont Modified glycolide resins
ES370853A1 (en) 1968-09-17 1971-07-01 Fmc Corp Polyester
US4029870A (en) * 1970-02-03 1977-06-14 Imperial Chemical Industries Limited Tetrafluoroethylene polymers
US3766031A (en) * 1972-04-10 1973-10-16 Garlock Inc Process for non-destructive radiation degradation of polytetrafluoroethylene
US4220511A (en) * 1979-03-12 1980-09-02 Radiation Dynamics, Inc. Treatment of sintered poly-tetrafluoroethylene with irradiation and heat to produce a grindable material
ATE77664T1 (en) 1987-10-08 1992-07-15 Walter Neukomm FLAT KNITTING MACHINE.
US5049465A (en) * 1988-11-15 1991-09-17 Somar Corporation Electrophotographic photosensitive material and method of preparing same
US4986355A (en) * 1989-05-18 1991-01-22 Conoco Inc. Process for the preparation of fluid loss additive and gel breaker
DE19529348C2 (en) * 1995-08-09 1997-11-20 Stockhausen Chem Fab Gmbh Absorbent for water and aqueous liquids based on polyacrylate and process for their production and use
DE19540951A1 (en) * 1995-11-03 1997-05-07 Basf Ag Water-absorbent, foam-like, crosslinked polymers, processes for their preparation and their use
US5916929A (en) * 1997-06-23 1999-06-29 E-Beam Services, Inc. Method for irradiating organic polymers
ATE219782T1 (en) * 1997-09-18 2002-07-15 Monsanto Co MODIFIED POLYHYDROXY ALKANOATES FOR PRODUCING COATINGS AND FILM
US20020136848A1 (en) 1998-03-12 2002-09-26 Fumio Yoshii Lactone-containing resin composition, molded object thereof, and film
DE19846413A1 (en) * 1998-10-08 2000-04-13 Basf Ag Economical preparation of swellable, hydrophilic polymer having good water absorption properties, useful e.g. in hygienic articles, by polymerization, comminution, post-neutralization, drying, grinding and sieving
US6319521B1 (en) * 1999-02-10 2001-11-20 University Technology Corporation Microparticles of lactide-co-glycolide copolymers and methods of making and using the same
DE10012010A1 (en) * 2000-03-11 2001-09-20 Axiva Gmbh Increased efficiency of pelletization of synthetic polymers involves treatment with an oxidizing agent before or during pelletization
US6376585B1 (en) * 2000-06-26 2002-04-23 Apex Advanced Technologies, Llc Binder system and method for particulate material with debind rate control additive
CA2502228C (en) * 2002-10-28 2011-04-19 Schlumberger Canada Limited Self-destructing filter cake
GB2412389A (en) * 2004-03-27 2005-09-28 Cleansorb Ltd Process for treating underground formations
TW200630415A (en) 2004-12-21 2006-09-01 Clariant Int Ltd Process for the preparation of cross-linked PBT particles
US7267170B2 (en) * 2005-01-31 2007-09-11 Halliburton Energy Services, Inc. Self-degrading fibers and associated methods of use and manufacture
US20080009423A1 (en) * 2005-01-31 2008-01-10 Halliburton Energy Services, Inc. Self-degrading fibers and associated methods of use and manufacture
US20070298977A1 (en) * 2005-02-02 2007-12-27 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US20060169450A1 (en) * 2005-02-02 2006-08-03 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US20060172895A1 (en) * 2005-02-02 2006-08-03 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US20060172894A1 (en) * 2005-02-02 2006-08-03 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US8598092B2 (en) * 2005-02-02 2013-12-03 Halliburton Energy Services, Inc. Methods of preparing degradable materials and methods of use in subterranean formations

Also Published As

Publication number Publication date
GB0811857D0 (en) 2008-07-30
GB2446764A (en) 2008-08-20
US20080293843A1 (en) 2008-11-27
WO2007060470A1 (en) 2007-05-31
CA2631126C (en) 2012-08-21
GB2446764B (en) 2010-06-09
US8101675B2 (en) 2012-01-24
GB0524196D0 (en) 2006-01-04

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