US3894115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyesters having high impact strength and low water absorption
Assignee: Chevron USA Inc
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Filing: 1974-05-20
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Granted: 1975-07-08
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Expires: 1994-05-20
Abstract
Abstract Unsaturated polyesters formed from the condensation reaction of unsaturated and saturated dibasic acids and dihydric alcohols, at least a portion of which is 3-methyl-1,5-pentanediol, exhibit unexpectedly advantageous physical properties when copolymerized with an ethylenically unsaturated monomer.
Inventors
- 👤 Robert Bacskai
- 👤 John B Wilkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:13
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
43 words
AN UNSATURATED POLYESTER COMPOSITION COMPRISING APPROXIMATELY EQUIMOLAR AMOUNTS OF: A. DIHYDRIC ALCOHOL OR MIXTURE OF DIHYDRIC ALCOHOLS COMPRISING AT LEAST 10 MOL PERCENT 3-METHYL-1,5 PENTANEDIOL, B. A DICARBOXYLIC ACID OR ANHYDRIDE COMPRISING AT LEAST 20 MOL PERCENT ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID OR ANHYDRIDE.
Claim 2
Dependent Claim
43 words
AN UNSATURATED POLYESTER COMPOSITION COMPRISING APPROXIMATELY EQUIMOLAR AMOUNTS OF: A. DIHYDRIC ALCOHOL OR MIXTURE OF DIHYDRIC ALCOHOLS COMPRISING AT LEAST 10 MOL PERCENT 3-METHYL-1,5 PENTANEDIOL, B. A DICARBOXYLIC ACID OR ANHYDRIDE COMPRISING AT LEAST 20 MOL PERCENT ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID OR ANHYDRIDE.
Claim 3
Dependent Claim
41 words
A composition in accordance with claim 1 wherein from about 40 to 60 mol percent of said dicarboxylic acid or anhydride is an unsaturated dicarboxylic acid or anhydride selected from the group consisting of maleic acid, maleic anhydride and fumaric acid.
Claim 4
Dependent Claim
30 words
A composition in accordance with claim 2 wherein the remainder of said dicarboxylic acid or anhydride is selected from the group consisting of phthalic acid, isophthalic acid and their anhydrides.
Claim 5
Dependent Claim
33 words
A composition in accordance with claim 1 wherein the dihydric alcohols comprise a mixture of 3-methyl-1,5-pentanediol and a second dihydric alcohol selected from the group consisting of ethylene glycol, diethylene glycol and 1,2-propanediol.
Claim 6
Dependent Claim
18 words
A composition in accordance with claim 1 wherein at least 25 mol percent of said alcohol is 3-methyl-1,5-pentanediol.
Claim 7
Dependent Claim
14 words
A composition in accordance with claim 1 wherein all of said alcohol is 3-methyl-1,5-pentanediol.
Claim 8
Dependent Claim
32 words
A COMPOSITION COMPRISING FROM 25 TO 75 PERCENT BY WEIGHT OF THE POLYESTER, ACCORDING TO CLAIM 1, AND FROM 75 TO 25 OF A MONOETHYLENICALLY UNSATURATED POLYMERIZABLE MONOMER HAVING A >C=CH2 GROUP.
Claim 9
Dependent Claim
24 words
A composition comprising from 25 to 75 percent by weight of the polyester, according to claim 1, and from 75 to 25 percent styrene.
Claim 10
Dependent Claim
24 words
A composition comprising from 50 to 70 percent by weight of the polyester, according to claim 3, and from 50 to 30 percent styrene.
Claim 11
Dependent Claim
24 words
A composition comprising from 50 to 70 percent by weight of the polyester, according to claim 5, and from 50 to 30 percent styrene.
Claim 12
Dependent Claim
11 words
A thermoset polyester resin comprising the copolymerized composition of claim 7.
Claim 13
Dependent Claim
11 words
A thermoset polyester resin comprising the copolymerized composition of claim 8.
Claim 14
Dependent Claim
11 words
A thermoset polyester resin comprising the copolymerized composition of claim 9.
Claim 15
Dependent Claim
11 words
A thermoset polyester resin comprising the copolymerized composition of claim 10.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |