Patent US3922247A successfully refreshed from Google Patents.
US3922247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handleable, moldable ester-type resin compositions
Assignee: Gulf Research and Development Co
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Filing: 1973-06-15
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Granted: 1975-11-25
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Expires: 1993-06-15
Abstract
Abstract Moldable, handleable ester-type resin-glass fiber compositions, are prepared by inducing partial vinyl polymerization of a mixture of a mono-olefin capable of being polymerized by free radical means and an unsaturated ester-type resin using benzoyl peroxide and controlled conditions. A mixture of styrene, an unsaturated polyester resin and glass fiber can be partially polymerized into a handleable, moldable intermediate composition adapted for mold curing to a solid, infusible reinforced product.
Inventors
- 👤 Stanley M Hazen
- 👤 William J Heilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:50
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08F; C08F299/00; C08F299/02; C08F299/026; C08K3/00; C08K3/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
201 words
A METHOD OF PREPARING A THERMOSETTABLE, MOLDABLE COMPOSITION WHICH COMPRISES C. FORMING A LIQUID SOLUTION OF A RESIN MIXTURE CONSISTING ESSENTIALLY OF AN UNSATURATED POLYESTER OR VINYL ESTER RESIN, AN OLEFINICALLY UNSATURATED MONOMER CONTAINING AS ITS ONLY FUNCTIONAL GROUPS AT LEAST ONE OLEFINIC DOUBLE BOND CAPABLE OF POLYMERIZATION BY FREE RADICAL MEANS, AND BENZOYL PEROXIDE, WHEREIN SAID UNSATURATED POLYESTER RESIN IS THE REACTION PRODUCT OF AT LEAST ONE DIOL AND AT LEAST ONE UNSATURATED DICARBOXYLIC ACID OR UNSATURATED DICARBOXYLIC ANHYDRIDE AND SAID VINYL ESTER RESIN IS THE REACTION PRODUCT OF AN EPOXIDE HAVING AN EPOXY EQUIVALENT VALUE GREATER THAN ONE WITH AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID; PREPARING A COMPOSITE OF SAID SOLUTION AND A FIBROUS SUBSTRATE; PARTIALLY COPOLYMERIZING SAID RESIN MIXTURE THROUGH SAID OLEFINIC DOUBLE BONDS OF SAID UNSATURATED POLYESTER OR VINYL ESTER RESIN AND SAID OLEFINICALLY UNSATURATED MONOMER BY FREE RADICAL MEANS BY HEATING SAID COMPOSITE TO A TEMPERATURE BETWEEN ABOUT 75*C. AND ABOUT 95*C. TO THICKEN SAID COMPOSITE TO A THERMOSETTABLE, MOLDABLE COMPOSITION COMPRISING A HOMOGENEOUS MIXTURE OF UNSATURATED POLYESTER OR VINYL ESTER RESIN, OLEFINICALLY UNSATURATED MONOMER, COPOLYMER GET AND FIBROUS SUBSTRATE; AND COOLING SAID COMPOSITE BELOW THE COPOLYMERIZATION TEMPERATURE OF SAID RESIN MIXTURE FOLLOWING SAID PARTIAL VINYL POLYMERIZATION.
Claim 2
Independent Claim
201 words
A METHOD OF PREPARING A THERMOSETTABLE, MOLDABLE COMPOSITION WHICH COMPRISES C. FORMING A LIQUID SOLUTION OF A RESIN MIXTURE CONSISTING ESSENTIALLY OF AN UNSATURATED POLYESTER OR VINYL ESTER RESIN, AN OLEFINICALLY UNSATURATED MONOMER CONTAINING AS ITS ONLY FUNCTIONAL GROUPS AT LEAST ONE OLEFINIC DOUBLE BOND CAPABLE OF POLYMERIZATION BY FREE RADICAL MEANS, AND BENZOYL PEROXIDE, WHEREIN SAID UNSATURATED POLYESTER RESIN IS THE REACTION PRODUCT OF AT LEAST ONE DIOL AND AT LEAST ONE UNSATURATED DICARBOXYLIC ACID OR UNSATURATED DICARBOXYLIC ANHYDRIDE AND SAID VINYL ESTER RESIN IS THE REACTION PRODUCT OF AN EPOXIDE HAVING AN EPOXY EQUIVALENT VALUE GREATER THAN ONE WITH AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID; PREPARING A COMPOSITE OF SAID SOLUTION AND A FIBROUS SUBSTRATE; PARTIALLY COPOLYMERIZING SAID RESIN MIXTURE THROUGH SAID OLEFINIC DOUBLE BONDS OF SAID UNSATURATED POLYESTER OR VINYL ESTER RESIN AND SAID OLEFINICALLY UNSATURATED MONOMER BY FREE RADICAL MEANS BY HEATING SAID COMPOSITE TO A TEMPERATURE BETWEEN ABOUT 75*C. AND ABOUT 95*C. TO THICKEN SAID COMPOSITE TO A THERMOSETTABLE, MOLDABLE COMPOSITION COMPRISING A HOMOGENEOUS MIXTURE OF UNSATURATED POLYESTER OR VINYL ESTER RESIN, OLEFINICALLY UNSATURATED MONOMER, COPOLYMER GET AND FIBROUS SUBSTRATE; AND COOLING SAID COMPOSITE BELOW THE COPOLYMERIZATION TEMPERATURE OF SAID RESIN MIXTURE FOLLOWING SAID PARTIAL VINYL POLYMERIZATION.
Claim 3
Dependent Claim
15 words
A method in accordance with claim 1 in which said fibrous substrate is fiber glass.
Claim 4
Dependent Claim
16 words
A method in accordance with claim 1 in which the fibrous substrate is chopped glass fibers.
Claim 5
Dependent Claim
21 words
A method in accordance with claim 1 in which the said temperature is between about 80* C. and about 90* C.
Claim 6
Dependent Claim
31 words
A method in accordance with claim 1 in which the composite is quickly heated to the copolymerization temperature and is quickly cooled below the copolymerization temperature following said partial vinyl polymerization.
Claim 7
Dependent Claim
19 words
A method in accordance with claim 1 in which the olefinically unsaturated monomer is a mononuclear vinyl aromatic compound.
Claim 8
Dependent Claim
37 words
A method in accordance with claim 6 in which the unsaturated polyester resin is prepared from ethylene glycol, propylene glycol or mixtures thereof, maleic anhydride and a mononuclear aromatic anhydride and the olefinically unsaturated monomer is styrene.
Claim 9
Dependent Claim
46 words
A method in accordance with claim 1 in which said vinyl ester resin is prepared from an epoxy resin having a vicinal epoxide functionality greater than one and an Alpha , Beta -unsaturated monocarboxylic acid and the olefinically unsaturated monomer is a mononuclear vinyl aromatic compound.
Claim 10
Dependent Claim
36 words
A method in accordance with claim 8 in which the vinyl ester resin is prepared from acrylic acid, methacrylic acid or mixtures thereof and diglycidyl ether of bisphenol A and the olefinically unsaturated monomer is styrene.
Claim 11
Dependent Claim
24 words
A method in accordance with claim 1 in which the thermosettable, moldable composition is formed in a thickness no greater than about 10 millimeters.
Claim 12
Dependent Claim
24 words
A method in accordance with claim 1 in which the thermosettable, moldable composition is formed in a thickness no greater than about 5 millimeters.
Claim 13
Dependent Claim
24 words
A method in accordance with claim 1 in which the thermosettable, moldable composition is formed in a thickness no greater than about 3 millimeters.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |