Patent US4892919A successfully refreshed from Google Patents.
US4892919A
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Terephthalic containing hybrid castable resins
Assignee: Cook Composites and Polymers Co
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Filing: 1988-11-28
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Granted: 1990-01-09
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Expires: 2008-11-28
Abstract
Abstract Hybrid resins result from the combination of the urethane and unsaturated polyester technology. Improved resin casting and laminate properties are obtained when polyalkylene terephthalate unsaturated polyesters are employed, in lieu of the isophthalic polyesters of the prior art. Especially notable are improved heat distortion temperatures which exceed substantially those of the isophthalic based resins. The economics of using such terephthalate resins is demonstrated. Also within the scope of the present invention is the use of secondary hydroxyl compounds in the preparation of the polyesters. It has previously been believed that such compounds led to embrittlement of the final hybrid.
Inventors
- 👤 Robert H. Leitheiser
- 👤 Joan E. Karloske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:42
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08G18/683
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
68 words
A hybrid resin system which comprises an unsaturated polyester polyol, an unsaturated diluent, a diisocyanate and catalysts for promoting the urethane reaction between the polyol and the diisocyanate and the crosslinking reaction between the unsaturated bonds of the urethane and the diluent, the improvement comprising employing a terephthlate containing entity in the preparation of said polyester polyol as the principal aromatic diacid or diester component of said polyol.
Claim 2
Dependent Claim
68 words
A hybrid resin system which comprises an unsaturated polyester polyol, an unsaturated diluent, a diisocyanate and catalysts for promoting the urethane reaction between the polyol and the diisocyanate and the crosslinking reaction between the unsaturated bonds of the urethane and the diluent, the improvement comprising employing a terephthlate containing entity in the preparation of said polyester polyol as the principal aromatic diacid or diester component of said polyol.
Claim 3
Dependent Claim
31 words
The hybrid resin system of claim 1 wherein said terephthalic containing entity is selected from the group consisting of polyalkylene terephthalate or a combination of terephthalic acid and an alkylene glycol.
Claim 4
Dependent Claim
13 words
The hybrid resin system of claim 2 wherein said entity comprises polyethylene terephthalate.
Claim 5
Dependent Claim
20 words
The hybrid resin system of claim 1 wherein said polyol is prepared from at least one secondary hydroxyl containing polyol.
Claim 6
Dependent Claim
27 words
The hybrid resin system of claim 4 wherein said secondary hydroxyl containing polyol is selected from the group consisting of dipropylene glycol, tripropylene glycol and blends thereof.
Claim 7
Dependent Claim
22 words
The hybrid resin system of claim 1 wherein said reactive diluent is selected from the group consisting of styrene and vinyl toluene.
Claim 8
Dependent Claim
37 words
They hybrid resin system of claim 1 wherein said polyester polyol is prepared by reacting a terephthalate containing entity, a polyol and a material selected from the group consisting of maleic anhydride, fumaric acid or blends thereof.
Claim 9
Dependent Claim
25 words
The hybrid resin system of claim 7 wherein isomerization of said maleic anhydride to fumaric acid is promoted during the formation of said polyester polyol.
Claim 10
Dependent Claim
68 words
A polymeric casting prepared by reacting an unsaturated polyester polyol, an unsaturated diluent, a diisocyanate and catalysts for promoting the urethane reaction between the polyol and the diisocyanate and the crosslinking reaction between the unsaturated bonds of the urethane and the diluent, the improvement comprising employing a terephthlate containing entity in the preparation of said polyester polyol as the principal aromatic diacid or diester component of said polyol.
Claim 11
Dependent Claim
68 words
A polymeric casting prepared by reacting an unsaturated polyester polyol, an unsaturated diluent, a diisocyanate and catalysts for promoting the urethane reaction between the polyol and the diisocyanate and the crosslinking reaction between the unsaturated bonds of the urethane and the diluent, the improvement comprising employing a terephthlate containing entity in the preparation of said polyester polyol as the principal aromatic diacid or diester component of said polyol.
Claim 12
Dependent Claim
30 words
The polymeric casting of claim 9 wherein said terephthalic containing entity is selected from the group consisting of polyalkylene terephthalate or a combination of terephthalic acid and an alkylene glycol.
Claim 13
Dependent Claim
12 words
The polymeric casting of claim 10 wherein said entity comprises polyethylene terephthalate.
Claim 14
Dependent Claim
19 words
The polymeric casting of claim 9 wherein said polyol is prepared from at least one secondary hydroxyl containing polyol.
Claim 15
Dependent Claim
26 words
The polymeric casting of claim 12 wherein said secondary hydroxyl containing polyol is selected from the group consisting of dipropylene glycol, tripropylene glycol and blends thereof.
Claim 16
Dependent Claim
21 words
The polymeric casting of claim 9 wherein said reactive diluent is selected from the group consisting of styrene and vinyl toluene.
Claim 17
Dependent Claim
36 words
The polymeric casting of claim 9 wherein said polyester polyol is prepared by reacting a terephthalate containing entity, a polyol and a material selected from the group consisting of maleic anhydride, fumaric acid or blends thereof.
Claim 18
Dependent Claim
29 words
The polymeric casting of claim 15 wherein a blend is employed and isomerization of said maleic anhydride to fumaric acid is promoted during the formation of said polyester polyol.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |