Patent EP0513679A2 successfully refreshed from Google Patents.
EP0513679A2
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EP
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Hydroxy-functional polyesters as thermoplastic barrier resins
Assignee: Dow Chemical Co
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Filing: 1992-05-08
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Granted: —
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Expires: 2012-05-08
Abstract
Abstract Polyesters having improved barrier to oxygen are normally solid, thermoplastic methylol polyesters having backbone repeating units containing pendant hydroxyl and methylol moieties and divalent organic moieties such as m-phenylene, p-phenylene, and isopropylidene diphenylene. Such polyesters are prepared by reacting diglycidyl esters of aromatic diacids such as diglycidyl terephthalate or diglycidyl ethers of dihydric phenols with diacids such as isophthalic acid.
Inventors
- 👤 Michael N. Mang
- 👤 Jerry E. White
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 23:23
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G63/40; C08G63/42; C08G63/66; C08G63/668
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A normally solid, thermoplastic methylol polyester having repeating units represented by the formula: wherein each of R¹ and R² is individually a divalent organic moiety which is predominantly hydrocarbon, each R³ is individually hydrogen or lower alkyl, y is a fraction from 0 to 0.5 and x is a fraction from 0.05 to 0.4.
Claim 2
Dependent Claim
36 words
The polyester of Claim 1 wherein each of R¹ and R² is individually a divalent aromatic moiety selected from arylene, alkylenearylene, dialkylenearylene, diaryleneketone, diarylenesulfone, diarylenesulfoxide, alkylenecarbonylarylene, alkylenesulfonylarylene, alkylidene-diarylene, diarylene oxide, alkyleneoxyarylene, alkylenethioarylene, diarylene sulfide and diarylenecyanomethane.
Claim 3
Dependent Claim
41 words
The polyester of Claim 2 wherein each of R¹ and R² is individually a divalent aromatic moiety selected from m-phenylene, p-phenylene, isopropylidene diphenylene, biphenylene, biphenylene oxide, methylenediphenylene, biphenylene sulfide, naphthylene, biphenylenecyanomethane, 3,3'-dialkyldiphenylene-isopropylidene, 3,3',4,4'-tetraalkyldiphenylene-isopropylidene, and similar alkyl-substituted derivatives of such aromatic moieties.
Claim 4
Dependent Claim
18 words
The polyester of Claim 3 wherein each of R¹ and R² is individually m-phenylene, p-phenylene and isopropylidene diphenylene.
Claim 5
Dependent Claim
26 words
The polyester of Claim 1 wherein each of R¹ and R² is individually a divalent aliphatic moiety selected from alkylene, dialkyleneketone, dialkylenesulfone, dialkylenesulfoxide, dialkyleneoxide and dialkylenesulfide.
Claim 6
Dependent Claim
23 words
The polyester of Claim 5 wherein each of R¹ and R² is individually a divalent aliphatic moiety selected from ethylene, propylene and butylene.
Claim 7
Dependent Claim
14 words
The polyester of Claim 1 wherein x is a number from 0.1 to 0.3.
Claim 8
Dependent Claim
15 words
The polyester of Claim 7 wherein x is a number from 0. 1 to 0.2.
Claim 9
Dependent Claim
35 words
The polyester of Claim 8 which is represented by the formula: wherein each Y and Y' is individually hydrogen or a monovalent organic terminating group, and n is a whole number from 10 to 1000.
Claim 10
Dependent Claim
21 words
The polymer of Claim 9 wherein R¹ is m-phenylene, R² is isopropylidenediphenylene, x is 0.2, and n is 200 to 800.
Claim 11
Dependent Claim
24 words
The polymer of Claim 9 wherein R¹ is p-phenylene, y is 0, x is 0.2 and n is a number from 200 to 800.
Claim 12
Dependent Claim
37 words
The polymer of Claim 9 wherein R¹ is m-phenylene or p-phenylene; R² is isopropylidenediphenylene, diphenylenecarbonyl, m-phenylene, p-phenylene and biphenylene; R³ is hydrogen; y is 0.5; x is 0.125 and n is a number from 200 to 800.
Claim 13
Dependent Claim
12 words
The polymer of Claim 1 in the form of a barrier container.
Claim 14
Dependent Claim
12 words
The polymer of Claim 2 in the form of a barrier film.
Claim 15
Dependent Claim
12 words
The polymer of Claim 1 in the form of a barrier coating.
Claim 16
Dependent Claim
12 words
The polymer of Claim 1 in the form of a foamed article.
References Cited (Backward Citations)
No citation records indexed.
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