US5134201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miscible polyester blends
Assignee: Dow Chemical Co
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Filing: 1991-10-28
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Granted: 1992-07-28
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Expires: 2011-10-28
Abstract
Abstract Miscible blends of (1) a thermoplastic methylol polyester having backbone repeating units containing pendent hydroxyl and methylol moieties and divalent organic moieties such as 1,3-phenylene, 1,4-phenylene, 2,6-naphthalene, biphenylene and isopropylidene diphenylene, and (2) a linear, saturated polyester or copolyester of aromatic dicarboxylic acids, such as poly(ethylene-co-1,4-cyclohexanedimethylene terephthalate) (PETG) and poly(ethylene terephthalate) (PET), have improved clarity and exhibit enhanced barrier to oxygen relative to PET and PETG.
Inventors
- 👤 Gerald F. Billovits
- 👤 Michael N. Mang
- 👤 Jerry E. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:08
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; Y; Y10; Y10S; Y10S525/00; Y10S525/933
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
A polymeric composition comprising a miscible blend of components: A) a linear, saturated polyester of aromatic diacids; and B) a thermoplastic methylol polyester which is miscible with Component A and which has repeating units represented by the formula: ##STR4## wherein each of R 1 and R 2 is individually a divalent organic moiety which is predominantly hydrocarbon, each R 3 is individually hydrogen or lower alkyl, y is about 0.5, and x is a fraction from about 0.05 to about 0.4, said component B being present in an amount sufficient to provide improved oxygen barrier property as compared to a composition which does not contain Component B.
Claim 2
Dependent Claim
107 words
A polymeric composition comprising a miscible blend of components: A) a linear, saturated polyester of aromatic diacids; and B) a thermoplastic methylol polyester which is miscible with Component A and which has repeating units represented by the formula: ##STR4## wherein each of R 1 and R 2 is individually a divalent organic moiety which is predominantly hydrocarbon, each R 3 is individually hydrogen or lower alkyl, y is about 0.5, and x is a fraction from about 0.05 to about 0.4, said component B being present in an amount sufficient to provide improved oxygen barrier property as compared to a composition which does not contain Component B.
Claim 3
Dependent Claim
45 words
The composition of claim 1 wherein Component A is present in an amount of from about 5 to about 95 weight percent of the blend and Component B is present in an amount of from about 95 to about 5 weight percent of the blend.
Claim 4
Dependent Claim
93 words
The composition of claim 1 wherein R 1 is a first divalent organic moiety such as 1,3-phenylene, 1,4-phenylene, 2,6-naphthalene, and/or biphenylene and, optionally, minor amounts of a second divalent organic moiety which is different from the first divalent organic moiety, such as alkylene, cycloalkylene, alkenylene, arylene, alkylarylene, dialkylenearylene, diaryleneketone, diarylenesulfone, diarylenesulfoxide. alkylidene-diarylene, diaryleneoxide. diarylenesulfide, and diarylenecyanomethane, said minor amounts being such that the mole ratio of 1,3-phenylene, 1,4-phenylene, 2,6-naphthalene, and/or biphenylene to the second divalent organic moiety is greater than about 0.80, with the proviso that Component B remains miscible with Component A.
Claim 5
Dependent Claim
85 words
The composition of claim 1 wherein R 2 is a first divalent organic moiety such as bisphenyleneisopropylidene and, optionally, minor amounts of a second divalent organic moiety which is different from the first divalent organic moiety such as alkylene, cycloalkylene, alkenylene, arylene, alkylarylene, dialkylenearylene. diaryleneketone, diarylenesulfone, diarylenesulfoxide, alkylidenediarylene, diaryleneoxide, diarylenesulfide, and diarylenecyanomethane, said minor amounts being such that the mole ratio of bisphenyleneisopropylidene to the second divalent organic moiety is greater than about 0.80, with the proviso that Component B remains miscible with Component A.
Claim 6
Dependent Claim
32 words
The composition of claim 1 wherein R 1 is 1,3-phenylene, 1,4-phenylene, 2,6-naphthalene, or biphenylene, R 2 is bisphenyleneisopropylidene, R 3 is hydrogen, and x is a fraction from about 0.05 to 0.4.
Claim 7
Dependent Claim
11 words
The composition of claim 5 wherein Component A comprises poly(ethylene terephthalate).
Claim 8
Dependent Claim
11 words
The composition of claim 5 wherein Component A comprises poly(ethylene-co-1,4-cyclohexanedimethylene terephthalate).
Claim 9
Dependent Claim
57 words
The composition of claim 1 wherein Component B is a thermoplastic methylol polyester having repeating units represented by the formula: ##STR5## herein each Y and Y'is individually hydrogen or a monovalent organic terminating group, R 1 , R 2 , and R 3 are as defined before and n is a whole number from 10 to 1000.
Claim 10
Dependent Claim
32 words
The composition of claim 8 wherein R 1 is 1,3-phenylene, 1,4-phenylene, 2,6-naphthalene, or biphenylene, R 2 is bisphenyleneisopropylidene, R 3 is hydrogen, and x is a fraction from about 0.05 to 0.4.
Claim 11
Dependent Claim
11 words
The composition of claim 8 wherein Component A comprises poly(ethylene terephthalate).
Claim 12
Dependent Claim
11 words
The composition of claim 8 wherein Component A comprises poly(ethylene-co-1,4-cyclohexanedimethylene terephthalate).
Claim 13
Dependent Claim
12 words
The composition of claim 1 in the form of a barrier container.
Claim 14
Dependent Claim
12 words
The composition of claim 1 in the form of a barrier film.
Claim 15
Dependent Claim
12 words
The composition of claim 1 in the form of a barrier coating.
Claim 16
Dependent Claim
12 words
The composition of claim 1 in the form of a foamed article.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |