US4081428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-09-24
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Granted: 1978-03-28
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Expires: 1996-09-24
Abstract
Abstract A process for the preparation of a high molecular weight, linear polyesteramide comprising the capping of a linear, hydroxyl-ended polyester by reaction with a diaryl ester of a dicarboxylic acid of the formula: AOOC -- (--X--).sub.n -- COOB wherein n is zero or 1: X is a divalent aromatic group, and A and B each independently stand for a monovalent aryl group of 6 to 20 carbon atoms, in the presence of a catalyst, and reaction of the capped polyester with a diamine to form a polyesteramide.
Inventors
- 👤 Ronald Austin Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:56
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
226 words
A process for the preparation of a high molecular weight, linear polyesteramide comprising the steps of (a) reacting at least one dicarboxylic acid of the formula HOOC--D--COOH with at least one glycol of the formula HO--E--OH wherein D = (R).sub.m and E = (R).sub.q m being an integer from 3 to 10 q being an integer from 2 to 12, and R being independently selected from the group consisting of (CH 2 ), a combination of (CH 2 ) and (CH CH 3 ), and a combination of (CH 2 ) and (C(CH 3 ) 2 ), to produce an initial, hydroxy-terminated, polyester having a molecular weight within the range 700 to 10,000, (b) reacting the initial polyester in the presence of a catalyst with a diaryl ester of a carboxylic acid of the formula A--OOC--(X) n --COOB wherein n is selected from 0 and 1, X is a divalent aromatic group, and A and B are each independently a monovalent aryl group having 6 to 20 carbon atoms the molecular ratio of the diaryl ester of the carboxylic acid to the polyester being within the range 1.5:1 to 5:1, to give a capped polyester in which virtually all the ends are derived from the diaryl ester of the dicarboxylic acid, and (c) reacting the capped polyester with a diamine at a temperature above 220° C.
Claim 2
Dependent Claim
226 words
A process for the preparation of a high molecular weight, linear polyesteramide comprising the steps of (a) reacting at least one dicarboxylic acid of the formula HOOC--D--COOH with at least one glycol of the formula HO--E--OH wherein D = (R).sub.m and E = (R).sub.q m being an integer from 3 to 10 q being an integer from 2 to 12, and R being independently selected from the group consisting of (CH 2 ), a combination of (CH 2 ) and (CH CH 3 ), and a combination of (CH 2 ) and (C(CH 3 ) 2 ), to produce an initial, hydroxy-terminated, polyester having a molecular weight within the range 700 to 10,000, (b) reacting the initial polyester in the presence of a catalyst with a diaryl ester of a carboxylic acid of the formula A--OOC--(X) n --COOB wherein n is selected from 0 and 1, X is a divalent aromatic group, and A and B are each independently a monovalent aryl group having 6 to 20 carbon atoms the molecular ratio of the diaryl ester of the carboxylic acid to the polyester being within the range 1.5:1 to 5:1, to give a capped polyester in which virtually all the ends are derived from the diaryl ester of the dicarboxylic acid, and (c) reacting the capped polyester with a diamine at a temperature above 220° C.
Claim 3
Dependent Claim
10 words
A process according to claim 1 wherein X is paraphenylene.
Claim 4
Dependent Claim
46 words
A process according to claim 1 wherein the catalyst employed for the reaction of the diaryl ester of the carboxylic acid with the initial polyester is a compound of a metal selected from the group consisting of antimony, germanium, tin, titanium, zinc, cobalt, manganese and lead.
Claim 5
Dependent Claim
30 words
A process according to claim 1 wherein the dicarboxylic acid used for preparing the initial polyester is selected from the group consisting of adipic, azelaic, 2,2,4-trimethyl adipic, and dodecanedioc acids.
Claim 6
Dependent Claim
29 words
A process according to claim 1 wherein the glycol is selected from the group consisting of ethylene glycol, propane - 1,2-diol, propane - 1,3-diol, tetramethylene glycol, and neopentylene glycol.
Claim 7
Dependent Claim
57 words
A process according to claim 1 wherein the diamine is selected from the group consisting of aliphatic, cycloaliphatic, and oxyaliphatic diamines, and a mixed aliphatic - aromatic diamine in which the --NH 2 groups are attached to a group selected from methyl and substituted methylene groups and not to carbon atoms forming part of the aromatic system.
Claim 8
Dependent Claim
33 words
A process according to claim 6 wherein the diamine is selected from the group consisting of hexamethylene diamine, dodecamethylene diamine, piperazine, p-xylene-diamine, and bis (p-aminocyclohexyl) methane having a high ratio of trans-trans isomer.
Claim 9
Dependent Claim
27 words
A process according to claim 1 wherein step (c) is continued until the relative viscosity is at least 2.0, measured at a concentration of 1% in orthochlorophenol.
Claim 10
Dependent Claim
7 words
A polyesteramide produced according to claim 1.
References Cited (Backward Citations)
US3433770A
Cited
US4004960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |