US4305864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast crystallizing polyester compositions
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1980-06-16
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Granted: 1981-12-15
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Expires: 2000-06-16
Abstract
Abstract Fast crystallizing polyester compositions obtained by reacting a polyester having an intrinsic viscosity of greater than 0.3 which polyester comprises aromatic or cycloaliphatic residues obtained from diacids and/or hydroxyacids and aliphatic, aromatic or cycloaliphatic residues of diols with an ionizable metal salt of a compound containing a group of the formula >NH, preferably selected from compounds of the formula: <IMAGE> <IMAGE> and acid amides, lactams, polyamides and sulphonamides.
Inventors
- 👤 Brian P. Griffin
- 👤 Eric Nield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:52
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
50 words
A fast crystallising polyester composition obtained by reacting a polyester having an intrinsic viscosity of greater than 0.3 which polyester comprises aromatic or cycloaliphatic residues obtained from diacids and/or hydroxyacids and aliphatic, aromatic or cycloaliphatic residues of diols with an ionisable metal salt of a compound containing an >NH group.
Claim 2
Dependent Claim
50 words
A fast crystallising polyester composition obtained by reacting a polyester having an intrinsic viscosity of greater than 0.3 which polyester comprises aromatic or cycloaliphatic residues obtained from diacids and/or hydroxyacids and aliphatic, aromatic or cycloaliphatic residues of diols with an ionisable metal salt of a compound containing an >NH group.
Claim 3
Dependent Claim
29 words
A polyester composition according to claim 1 wherein the ionisable salt is formed from a compound selected from compounds of formula: ##STR3## and acid amides, lactams, polyamides and sulphonamides.
Claim 4
Dependent Claim
35 words
A fast crystallising polyester composition according to claim 1 wherein the reaction of the polyester with the salts results in at least 4% of the end groups of the polyester being converted to carboxylate groups.
Claim 5
Dependent Claim
33 words
A fast crystallising polyester composition according to claim 3 wherein the melt degradation performance of the polyester composition is not substantially inferior to that of the polyester in the absence of the salt.
Claim 6
Dependent Claim
29 words
A polyester composition according to any one of claims 1 to 4 in which the metal of the ionisable metal salt is selected from sodium, lithium, potassium or calcium.
Claim 7
Dependent Claim
31 words
A polyester composition according to any of claims 1 to 5 in which the polyester of the composition is a polyester containing at least 90 mole % of ethylene terephthalate units.
Claim 8
Dependent Claim
33 words
A polyester composition according to claim 6 wherein the polyester is a block copolyester containing from 0.05 to 10 mole % of polymeric segments having a glass-transition temperature of less than 0° C.
Claim 9
Dependent Claim
18 words
A polyester composition according to any one of claims 1 to 7 containing a plasticiser for the polyester.
Claim 10
Dependent Claim
28 words
A polyester composition according to any one of claims 1 to 8 containing from 5 to 80% by weight of the composition of a particulate or fibrous filler.
References Cited (Backward Citations)
US3551381A
Cited
GB1249535A
Cited
GB1282679A
Cited
GB1300308A
Cited
US3761450A
Cited
US3856749A
Cited
US4207230A
Cited
US4215032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |