US4431752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester foams
Assignee: Owens Corning Canada Inc
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Filing: 1982-11-08
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Granted: 1984-02-14
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Expires: 2002-11-08
Abstract
Abstract Compositions for producing unsaturated polyester foams comprising sodium borohydride for curing the composition in conjunction with an organic peroxide catalyst, and for producing hydrogen gas as the foaming agent. The compositions which are simple and safe to prepare produce high quality foams.
Inventors
- 👤 Stanley Oswitch, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/065; C08K; C08K3/00; C08K3/38; C08L; C08L67/00; C08L67/06; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
53 words
In a composition for producing an unsaturated polyester foam containing at least one of an unsaturated polyester, a cross-linkable monomer, a promoter, an accelerator, a catalyst and auxiliary agents, the improvement comprising: incorporating sodium borohydride into said composition as a promoter for curing said composition and as a foaming agent producing hydrogen gas.
Claim 2
Dependent Claim
53 words
In a composition for producing an unsaturated polyester foam containing at least one of an unsaturated polyester, a cross-linkable monomer, a promoter, an accelerator, a catalyst and auxiliary agents, the improvement comprising: incorporating sodium borohydride into said composition as a promoter for curing said composition and as a foaming agent producing hydrogen gas.
Claim 3
Dependent Claim
31 words
A composition for producing unsaturated polyester foam comprising: an unsaturated polyester resin; an organic peroxide catalyst; and sodium borohydride for curing said composition and as a foaming agent producing hydrogen gas.
Claim 4
Dependent Claim
31 words
A composition for producing unsaturated polyester foam comprising: an unsaturated polyester resin; an organic peroxide catalyst; and sodium borohydride for curing said composition and as a foaming agent producing hydrogen gas.
Claim 5
Dependent Claim
15 words
A composition as defined in claim 2, further comprising: a co-promoter for said sodium borohydride.
Claim 6
Dependent Claim
12 words
A composition as defined in claim 3, further comprising: a cross-linkage monomer.
Claim 7
Dependent Claim
30 words
A composition as defined in claim 2, 3 or 4, wherein said sodium borohydride comprises from about 2 to about 8 parts per 100 parts of said unsaturated polyester resin.
Claim 8
Dependent Claim
28 words
A composition as defined in claim 2, 3 or 4, wherein said sodium borohydride comprises at least about 0.5 parts per 100 parts of said unsaturated polyester resin.
Claim 9
Dependent Claim
39 words
A composition as defined in claim 2, 3 or 4, wherein said sodium borohydride produces hydrogen gas by reacting with an agent selected from the group consisting of: water, an alcohol and a dilute acid, contained in said composition.
Claim 10
Dependent Claim
18 words
A composition as defined in claim 2, 3 or 4, wherein said organic peroxide catalyst is benzoyl peroxide.
Claim 11
Dependent Claim
20 words
A composition as defined in claim 4, wherein said co-promoter is selected from the group consisting of dimethylaniline and diethylaniline.
Claim 12
Dependent Claim
33 words
A composition as defined in claim 2, 3 or 4, further comprising from about 10 to about 30 percent by weight of decabromodiphenyl oxide and about 4 percent by weight of antimony trioxide.
Claim 13
Dependent Claim
35 words
A composition as defined in claim 2, 3 or 4, further comprising from about 10 to about 30 percent by weight of a particulate fire retardant including decabromodiphenyl oxide and low levels of antimony oxide.
Claim 14
Dependent Claim
20 words
A composition as defined in claim 2, 3 or 4, further comprising a blowing agent which produces carbon dioxide gas.
Claim 15
Dependent Claim
27 words
A composition as defined in claim 2, 3 or 4, further comprising sodium bicarbonate in a ratio of from 5:1 to 10:1 relative to said sodium borohydride.
Claim 16
Dependent Claim
26 words
A composition as defined in claim 2, 3 or 4, wherein said unsaturated polyester resin has an unsaturated to saturated acid ratio of greater than 3:1.
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |