GB1042525A - Production of polyesters - Google Patents

Production of polyesters

Info

Publication number
GB1042525A
GB1042525A GB24738/64A GB2473864A GB1042525A GB 1042525 A GB1042525 A GB 1042525A GB 24738/64 A GB24738/64 A GB 24738/64A GB 2473864 A GB2473864 A GB 2473864A GB 1042525 A GB1042525 A GB 1042525A
Authority
GB
United Kingdom
Prior art keywords
anhydride
acid
acids
oxide
alkylene oxide
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.)
Expired
Application number
GB24738/64A
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.)
Allied Corp
Original Assignee
Allied Chemical Corp
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 Allied Chemical Corp filed Critical Allied Chemical Corp
Publication of GB1042525A publication Critical patent/GB1042525A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/52Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
    • C08G63/56Polyesters derived from ester-forming derivatives of polycarboxylic acids or of polyhydroxy compounds other than from esters thereof
    • C08G63/58Cyclic ethers; Cyclic carbonates; Cyclic sulfites ; Cyclic orthoesters

Abstract

A polyester is prepared by heating at least one a ,b -unsaturated dicarboxylic acid or anhydride, or a mixture of dicarboxylic acids or anhydrides of which at least 10 mol. per cent are a ,b -unsaturated, with ethylene oxide, propylene oxide or butylene oxide, or a mixture thereof, in the presence of a catalytic amount of a lithium compound until a product of acid number 20-130 is obtained, then heating this at 200-240 DEG C. for 30 minutes to 6 hours. The preferred anhydride or acid mixtures are phthalic anhydride/maleic anhydride and phthalic anhydride/fumaric acid Other suitable anhydrides for use with a ,b -unsaturated acids or anhydrides are those of succinic, adipic, glutaric, octadecylsuccinic, diglycollic, thiodiglycollic, tetrahydrophthalic, tetrachlorophthalic and other substituted phthalic acids, and those of Diels-Alder adducts of cyclopentadiene and maleic anhydride. The preferred alkylene oxide is propylene oxide. Suitable lithium compounds are the hydroxide, ethoxide, chloride, bromide, carbonate, acetate, nitrate, sulphate and phthalate. The preferred catalyst is lithium hydroxide, in amount 0.05-0.5% by weight of the polyester. The use of initiators, e.g. water, ethylene glycol, propylene glycol, fumaric acid or maleic acid, is desirable. In practice the acids, catalyst and initiator are mixed, and the alkylene oxide is then added at once, or in increments, or continuously during the reaction. Different acids may be added at various stages of the reaction, which may be held at 125-135 DEG C. during the addition of alkylene oxide or allowed to rise from 90 DEG to 200 DEG C. It is usually desirable to add further alkylene oxide after the heating to 200-240 DEG C., to bring the acid number to 10-40, after which the polyester may be thinned with 20-50% by weight of the composition of a polymerizable monomer containing at least one CH2 = C < group, e.g. styrene or vinyl toluene. The catalyst also may be added incrementally or continuously with the alkylene oxide. In examples, mixtures of phthalic anhydride with maleic anhydride or fumaric acid are heated, with or without water, with propylene oxide in the presence of lithium hydroxide, and the products are mixed with styrene. A comparison example, using sodium hydroxide, is supplied.
GB24738/64A 1963-06-17 1964-06-15 Production of polyesters Expired GB1042525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28851963A 1963-06-17 1963-06-17

Publications (1)

Publication Number Publication Date
GB1042525A true GB1042525A (en) 1966-09-14

Family

ID=23107467

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24738/64A Expired GB1042525A (en) 1963-06-17 1964-06-15 Production of polyesters

Country Status (5)

Country Link
AT (1) AT253229B (en)
ES (1) ES301028A1 (en)
FR (1) FR1398634A (en)
GB (1) GB1042525A (en)
NL (1) NL6406783A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023066269A1 (en) * 2021-10-19 2023-04-27 山东联欣环保科技有限公司 Method for mixed feeding of phthalic anhydride and propylene oxide, equipment, and application

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023066269A1 (en) * 2021-10-19 2023-04-27 山东联欣环保科技有限公司 Method for mixed feeding of phthalic anhydride and propylene oxide, equipment, and application

Also Published As

Publication number Publication date
AT253229B (en) 1967-03-28
ES301028A1 (en) 1965-01-01
FR1398634A (en) 1965-05-07
NL6406783A (en) 1964-12-18

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