US4283551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel acetylene end-capped polyesters
Assignee: Chevron USA Inc
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Filing: 1979-09-13
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Granted: 1981-08-11
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Expires: 1999-09-13
Abstract
Abstract A group of heat curable resins are provided which have good physical properties, which properties are retained to a surprising degree after prolonged exposure to temperatures as high as 300° C. The products are acetylene end-capped polyesters prepared by reacting a hydroxyphenylacetylene with a diacid chloride of an aromatic dibasic acid such as 4,4'-benzophenone dicarboxylic acid dichloride.
Inventors
- 👤 Wai Y. Chow
- 👤 Daniel J. Hurley
- 👤 James H. Rea
- 👤 S. Paul Thackaberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
C; C09; C09D; C09D4/00; C07; C07C; C07C69/00; C07C69/76; C07C69/80; C07C69/82; C07C69/84; C07C69/86; C08; C08F; C08F38/00; C09J; C09J4/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
39 words
A heat-curable acetylene end-capped polyester having the structure: ##STR6## where R is a phenylene group, a naphthylene group, or the structure: ##STR7## where X is ##STR8## or a bond, or the structure: ##STR9## and R' is a phenylene group.
Claim 2
Dependent Claim
39 words
A heat-curable acetylene end-capped polyester having the structure: ##STR6## where R is a phenylene group, a naphthylene group, or the structure: ##STR7## where X is ##STR8## or a bond, or the structure: ##STR9## and R' is a phenylene group.
Claim 3
Dependent Claim
12 words
A product of claim 1 in which R has the structure: ##STR10##
Claim 4
Dependent Claim
93 words
A method for preparing a product of claim 1 which consists essentially of reacting 2 molar portions of a hydroxyphenylacetylene with 1 molar portion of a diacid chloride in a solvent having good solvent power for both reactants at a temperature below 10° C. and in the presence of an acid acceptor which reacts with the hydrogen chloride formed as a coproduct; said diacid chloride having the structure: ##STR11## where R is a phenylene group, a naphthylene group, or the structure: ##STR12## where X is ##STR13## or a bond, or the structure: ##STR14##
Claim 5
Dependent Claim
12 words
The method of claim 3 in which R has the structure: ##STR15##
References Cited (Backward Citations)
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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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |