Patent US3989769A successfully refreshed from Google Patents.
US3989769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified synthetic thermosetting resins and compositions containing same
Assignee: British Industrial Plastics Ltd
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Filing: 1974-05-28
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Granted: 1976-11-02
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Expires: 1994-05-28
Abstract
Abstract Thermosetting resins selected from aminoplast, unsaturated polyesters, and cross-linkable high-vinyl polybutadienes and certain derivatives thereof (a thermosetting moulding material containing said resins) are modified by incorporation of up to 50% by weight (based on the total weight) of a low-vinyl polybutadiene or certain derivatives thereof.
Inventors
- 👤 Michael G. Bonnington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:46
CPC Classifications
C; C08; C08L; C08L9/00; C08L101/00; C08L19/00; C08L19/006; Y; Y10; Y10S; Y10S525/00; Y10S525/914
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A synthetic thermosetting resin comprising i. an unsaturated polyester thermosetting resin, and ii. 20 to 50 percent by weight, based on the total weight of (i) and (ii), of a polybutadiene selected from butadiene-based polymers having a vinyl content of up to 50 percent of the unsaturation thereof; hydroxyl-, carboxyl-, mercapto- and amino-terminated derivatives thereof.
Claim 2
Dependent Claim
55 words
A synthetic thermosetting resin comprising i. an unsaturated polyester thermosetting resin, and ii. 20 to 50 percent by weight, based on the total weight of (i) and (ii), of a polybutadiene selected from butadiene-based polymers having a vinyl content of up to 50 percent of the unsaturation thereof; hydroxyl-, carboxyl-, mercapto- and amino-terminated derivatives thereof.
Claim 3
Dependent Claim
19 words
The thermosetting resin of claim 1 wherein the unsaturated polyester resin of (i) is modified with a polybutadiene resin.
Claim 4
Dependent Claim
16 words
The synthetic thermosetting resin of claim 2 wherein the polybutadiene resin is a high vinyl type.
Claim 5
Dependent Claim
29 words
A thermosetting moulding material comprising a thermosetting resin as defined in claim 1 and at least 15% by weight (of the total weight of the material) of a filler.
References Cited (Backward Citations)
US3468972A
Cited
US3476697A
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US3518213A
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US3598882A
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US3577478A
Cited
US3838096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |