US4281077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastifiers, method of preparation and PVC compositions containing same
Assignee: Solutia Inc
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Filing: 1980-03-24
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Granted: 1981-07-28
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Expires: 2000-03-24
Abstract
Abstract Block copolyesters and block copolyesterurethanes are presented which are useful as plastifiers for PVC. The plastifiers, depending on process variations, contain ordered or random blocks of amorphous and semi-crystalline structure and are characterized as being highly compatible and substantially non-fugitive when blended with PVC.
Inventors
- 👤 J. William Hirzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:11
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4202; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08G2250/00; C08L67/00; C08L67/02; C08L75/00; C08L75/04; C08L75/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
An ordered, solid, block copolyester having from about 15 to about 50 percent by weight amorphous end blocks and from about 85 to about 50 percent by weight ordered polymeric center block having from 20 to about 100 percent crystallinity based on heat of fusion, said copolyester having from about 20 to about 95 percent crystallinity based on heat of fusion, said ordered polymeric center block consisting essentially of crystalline or semi-crystalline prepolymer blocks coupled via ester or urethane linkages, said crystalline prepolymer prepared by reacting equivalent amounts of dicarboxylic acid and crystallizing dihydroxy compound, said semi-crystalline prepolymer being prepared by reacting dicarboxylic acid with a mixture of non-crystallizing dihydroxy compound and and crystallizing dihydroxy compound in a ratio of non-crystalizing dihydroxy compound to crystalizing dihydroxy compound from about 0.1 to about 0.5. and said end blocks and center block being acid halide-coupled.
Claim 2
Dependent Claim
143 words
An ordered, solid, block copolyester having from about 15 to about 50 percent by weight amorphous end blocks and from about 85 to about 50 percent by weight ordered polymeric center block having from 20 to about 100 percent crystallinity based on heat of fusion, said copolyester having from about 20 to about 95 percent crystallinity based on heat of fusion, said ordered polymeric center block consisting essentially of crystalline or semi-crystalline prepolymer blocks coupled via ester or urethane linkages, said crystalline prepolymer prepared by reacting equivalent amounts of dicarboxylic acid and crystallizing dihydroxy compound, said semi-crystalline prepolymer being prepared by reacting dicarboxylic acid with a mixture of non-crystallizing dihydroxy compound and and crystallizing dihydroxy compound in a ratio of non-crystalizing dihydroxy compound to crystalizing dihydroxy compound from about 0.1 to about 0.5. and said end blocks and center block being acid halide-coupled.
Claim 3
Dependent Claim
13 words
Copolyester of claim 1 having from about 20 to about 50 percent crystallinity.
Claim 4
Dependent Claim
18 words
Copolyester of claim 1 wherein the crystallinity of said center block is from about 95 to 100 percent.
Claim 5
Dependent Claim
18 words
Copolyester of claim 1 wherein the crystallinity of said center block is from 20 to about 95 percent.
Claim 6
Dependent Claim
41 words
Copolyester of claim 1, said end blocks having been prepared by reacting aliphatic dicarboxylic acid having from about 4 to about 10 carbon atoms with dihydroxy compound selected from 1,3-butylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 2-ethyl-1,3-hexanediol, diethylene glycol and dipropylene glycol.
Claim 7
Dependent Claim
11 words
Composition comprising a halogen-containing polymer and a copolyester of claim 1.
Claim 8
Dependent Claim
11 words
Composition comprising a halogen-containing polymer and a copolyester of claim 3.
Claim 9
Dependent Claim
11 words
Composition comprising a halogen-containing polymer and a copolyester of claim 4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |