US4112018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resins suitable for the production of cross-linked polyesters which are difficult to saponify
Assignee: Bayer AG
•
Filing: 1976-08-30
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Granted: 1978-09-05
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Expires: 1996-08-30
Abstract
Abstract Unsaturated polyester resins which are suitable for the production of cross-linked polyesters which are with difficulty to saponify contain, in part at least, radicals of 2-alkyl-1.3-propane diols as the alcohol component.
Inventors
- 👤 Hans-Joachim Traenckner
- 👤 Hans Jurgen Rosenkranz
- 👤 Hans-Michael Fischler
- 👤 Erich Eimers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:53
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
126 words
Unsaturated polyester resins suitable for the production of cross-linked polyesters which are difficult to saponify containing I. from 40 to 90% by weight of an unsaturated polyester which in turn consists of (a) from 30 to 80% by weight of radicals of α,β-ethylenically unsaturated dicarboxylic acids, of which up to 70 mol % may be replaced by radicals of saturated dicarboxylic acids and up to 10 mol % by monofunctional or trifunctional carboxylic acids, (b) from 20 to 70% by weight of radicals of 2-ethyl-1,3-propane diol, and (c) from 0 to 50% by weight of radicals of other diol components, of which up to 10 mol % may be replaced by monohydric or trihydric alcohols, and Ii. from 10 to 60% by weight of copolymerisable compounds.
Claim 2
Dependent Claim
126 words
Unsaturated polyester resins suitable for the production of cross-linked polyesters which are difficult to saponify containing I. from 40 to 90% by weight of an unsaturated polyester which in turn consists of (a) from 30 to 80% by weight of radicals of α,β-ethylenically unsaturated dicarboxylic acids, of which up to 70 mol % may be replaced by radicals of saturated dicarboxylic acids and up to 10 mol % by monofunctional or trifunctional carboxylic acids, (b) from 20 to 70% by weight of radicals of 2-ethyl-1,3-propane diol, and (c) from 0 to 50% by weight of radicals of other diol components, of which up to 10 mol % may be replaced by monohydric or trihydric alcohols, and Ii. from 10 to 60% by weight of copolymerisable compounds.
Claim 3
Dependent Claim
24 words
The unsaturated polyester resins of claim 1 in admixture with at least one member selected from the group consisting of polymerization initiators and inhibitors.
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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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |