US4355123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cured polyester compositions and process for their production
Assignee: Von Roll Isola USA Inc
•
Filing: 1980-12-16
•
Granted: 1982-10-19
•
Expires: 2000-12-16
Abstract
Abstract Cured polyester compositions and their production are described. These are produced by curing a composition containing polyester resin and aliphatic polyol having a molecular weight of at least about 2000. The polyol acts to reduce normal polyester shrinkage incident to curing so as to produce improved articles.
Inventors
- 👤 Charles D. Dudgeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08L; C08L67/00; C08L67/06; Y; Y10; Y10S; Y10S525/00; Y10S525/921
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
53 words
In a process for the production of a cured polyester resin composition comprising formulating a curable such composition and then curing said curable composition, the improvement wherein said composition contains an amount of aliphatic polyol having a molecular weight of at least about 2000 sufficient to reduce polyester resin shrinkage incident to curing.
Claim 2
Dependent Claim
53 words
In a process for the production of a cured polyester resin composition comprising formulating a curable such composition and then curing said curable composition, the improvement wherein said composition contains an amount of aliphatic polyol having a molecular weight of at least about 2000 sufficient to reduce polyester resin shrinkage incident to curing.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein the aliphatic polyol has a molecular weight of between about 4000 and 9000.
Claim 4
Dependent Claim
11 words
The process of claim 1, wherein the polyol is polypropylene triol.
Claim 5
Dependent Claim
18 words
The process of claim 1, wherein the polyol is dissolved in the uncured polyester resin of the composition.
Claim 6
Dependent Claim
18 words
The process of claim 1, wherein the composition contains from 40 to 80% polyester resin by total weight.
Claim 7
Dependent Claim
18 words
The process of claim 1, wherein the composition contains 5 to 40% polyol by weight of polyester resin.
Claim 8
Dependent Claim
18 words
The process of claim 1, wherein the composition is cured in a mold to provide a three-dimensional article.
Claim 9
Dependent Claim
29 words
A cured polymer composition comprising cured polyester resin and from 5 to 40% by resin weight of aliphatic polyol having a molecular weight of from about 4000 to 9000.
Claim 10
Dependent Claim
29 words
A cured polymer composition comprising cured polyester resin and from 5 to 40% by resin weight of aliphatic polyol having a molecular weight of from about 4000 to 9000.
Claim 11
Dependent Claim
20 words
The composition of claim 8, wherein the cured polyester resin and polyol constitute separate morphological phases of a molded composition.
Claim 12
Dependent Claim
18 words
The composition of claim 9, wherein the composition contains from 40 to 80% polyester resin by total weight.
Claim 13
Dependent Claim
11 words
The article of claim 10, wherein the polyol is polypropylene triol.
References Cited (Backward Citations)
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US3631144A
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US3740353A
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US3989655A
Cited
GB2037298A
Cited
US4290939A
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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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |