Patent US2137371A successfully refreshed from Google Patents.
Patent US3923928A successfully refreshed from Google Patents.
US3923928A
Expired / Lapsed
US
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Unsaturated polyesters and compositions based thereon
Assignee: Union Carbide Corp
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Filing: 1973-01-31
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Granted: 1975-12-02
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Expires: 1993-01-31
Abstract
Abstract The disclosure of this application is directed to unsaturated polyesters which are the condensation reaction products of a mixture of an unsaturated dicarboxylic acid or anhydride thereof, ethylene glycol and diethylene glycol; and to compositions based thereon which have particular utility in sheet molding and bulk molding applications to form thermoset articles of desired configuration.
Inventors
- 👤 Kenneth E Atkins
- 👤 Michael A Harpold
- 👤 Percy L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A COMPOSITION COMPRISING AN UNSATURATED POLYESTER WHICH IS THE CONDENSATION PRODUCT OF A REACTION MIXTURE CONSISTING ESSENTIALLY OF ETHYLENE GLYCOL, DIETHYLENE GLYCOL AND AN UNSATURATED DICARBOXYLIC ACID OR ANHYDRIDE THEREOF OR MIXTURES OF SAID ACID AND ANHYDRIDE WHEREIN THE ETHYLENE GLYCOL IS PRESENT IN AN AMOUNT OF ABOUT 10 TO 90 PERCENT BY WEIGHT BASED ON THE COMBINED WEIGHT OF ETHYLENE GLYCOL AND DIETHYLENE GLYCOL, A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMERS IN AN AMOUNT OF ABOUT 10 TO ABOUT 60 PERCENT BY WEIGHT BASED ON THE COMBINED WEIGHT OF SAID MONOMER AND SAID POLYESTER, A GROUP II METAL OXIDE OR HYDRODIXE THICKENER IN AN AMOUNT OF ABOUT 0.5 TO ABOUT 75 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID POLYESTER.
Claim 2
Dependent Claim
120 words
A COMPOSITION COMPRISING AN UNSATURATED POLYESTER WHICH IS THE CONDENSATION PRODUCT OF A REACTION MIXTURE CONSISTING ESSENTIALLY OF ETHYLENE GLYCOL, DIETHYLENE GLYCOL AND AN UNSATURATED DICARBOXYLIC ACID OR ANHYDRIDE THEREOF OR MIXTURES OF SAID ACID AND ANHYDRIDE WHEREIN THE ETHYLENE GLYCOL IS PRESENT IN AN AMOUNT OF ABOUT 10 TO 90 PERCENT BY WEIGHT BASED ON THE COMBINED WEIGHT OF ETHYLENE GLYCOL AND DIETHYLENE GLYCOL, A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMERS IN AN AMOUNT OF ABOUT 10 TO ABOUT 60 PERCENT BY WEIGHT BASED ON THE COMBINED WEIGHT OF SAID MONOMER AND SAID POLYESTER, A GROUP II METAL OXIDE OR HYDRODIXE THICKENER IN AN AMOUNT OF ABOUT 0.5 TO ABOUT 75 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID POLYESTER.
Claim 3
Dependent Claim
40 words
The composition as defined in claim 1 wherein the ethylene glycol of the reaction mixture is present in an amount of about 20 to about 80 percent by weight based on the combined weight of ethylene glycol and diethylene glycol.
Claim 4
Dependent Claim
33 words
The composition as defined in claim 1 wherein the unsaturated dicarboxylic acid of the polyester has the formula CnH2n 2(COOH)2 wherein n is an integer having a value of 2 to 20 inclusive.
Claim 5
Dependent Claim
20 words
The composition as defined in claim 3 wherein n is an integer having a value of 2 to 10 inclusive.
Claim 6
Dependent Claim
15 words
The composition as defined in claim 4 wherein the unsaturated dicarboxylic acid is maleic acid.
Claim 7
Dependent Claim
20 words
The composition as defined in claim 1 wherein the anhydride of the unsaturated polyester is the anhydride of maleic acid.
Claim 8
Dependent Claim
17 words
The composition as defined in claim 1 wherein a phthalic acid is present in the reaction mixture.
Claim 9
Dependent Claim
21 words
The composition as defined in claim 1 wherein a phthalic acid and maleic acid anhydride are present in the reaction mixture
Claim 10
Dependent Claim
66 words
A composition as defined in claim 1 wherein: the ethylenically unsaturated monomer is present in an amount of about 20 to about 50 percent by weight based on the combined weight of said monomer and said polyester and the Group II metal oxide or hydroxide is present in an amount of about 1 to about 5 percent by weight based on the weight of said polyester.
Claim 11
Dependent Claim
13 words
A composition as defined in claim 9 wherein the thickener is calcium hydroxide.
Claim 12
Dependent Claim
16 words
A composition as defined in claim 9 wherein the ethylenically unsaturated monomer is a vinyl monomer.
Claim 13
Dependent Claim
13 words
A composition as defined in claim 11 wherein the vinyl monomer is styrene.
Claim 14
Dependent Claim
10 words
The cured product of the composition defined in claim 9.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |