US4221889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divinyl polyester molding compositions
Assignee: Goodrich Corp
•
Filing: 1979-06-04
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Granted: 1980-09-09
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Expires: 1999-06-04
Abstract
Abstract Molding compositions containing a divinyl polyester resin, a polymerizable monomer, an epihalohydrin and, optionally, catalyst and other additives. The epihalohydrin improves the toughness of the divinyl polyester molding compositions.
Inventors
- 👤 Eugene H. Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:28
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026; C08F22/00; C08F22/10; C08F22/1006; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A divinyl polyester molding composition comprising: (a) a divinyl polyester resin, having the following skeletal structure ##STR4## (b) a polymerizable monomer, (c) from about 1 to about 30 parts by weight of an epihalohydrin polymer per 100 parts by weight of the combined weight of said unsaturated polyester resin and polymerizable monomer.
Claim 2
Dependent Claim
52 words
A divinyl polyester molding composition comprising: (a) a divinyl polyester resin, having the following skeletal structure ##STR4## (b) a polymerizable monomer, (c) from about 1 to about 30 parts by weight of an epihalohydrin polymer per 100 parts by weight of the combined weight of said unsaturated polyester resin and polymerizable monomer.
Claim 3
Dependent Claim
22 words
A composition of claim 1 wherein the epihalohydrin polymer has a number average molecular weight of from about 800 to about 50,000.
Claim 4
Dependent Claim
35 words
A composition of claim 2 containing a catalytic amount of a catalyst selected from the group consisting of benzoyl peroxide, tertiary butyl perbenzoate, cyclohexanone peroxide, tertiary butyl peroxide, tertiary butyl peroctoate, azoisobutyrodinitrile, and cumene hydroperoxide.
Claim 5
Dependent Claim
38 words
A composition of claim 2 wherein the level of epihalohydrin polymer is from about 1 to about 15 parts by weight per 100 parts by weight of the combined weight of said divinyl polyester resin and polymerizable monomer.
Claim 6
Dependent Claim
31 words
A composition of claim 4 wherein the epihalohydrin polymer is selected from the group consisting of a homopolymer of an epihalohydrin monomer and an oxide monomer containing a cyclic oxy ring.
Claim 7
Dependent Claim
14 words
A composition of claim 5 wherein the epihalohydrin polymer is a homopolymer of epichlorohydrin.
Claim 8
Dependent Claim
6 words
A cured composition of claim 1.
Claim 9
Dependent Claim
58 words
A process for producing a moldable divinyl polyester composition of claim 1 which comprises mixing at least one divinyl polyester resin with at least one polymerizable monomer and from about 1 to about 30 parts by weight of epihalohydrin polymer per 100 parts by weight of the combined weight of said divinyl polyester resin and said polymerizable monomer.
Claim 10
Dependent Claim
22 words
A process of claim 8 wherein the epihalohydrin polymer has a number average molecular weight of from about 800 to about 50,000.
Claim 11
Dependent Claim
9 words
A shaped article of a composition of claim 1.
References Cited (Backward Citations)
US3830874A
Cited
US4101604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |