US4029848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resins containing a dicyclopentadiene concentrate
Assignee: Dow Chemical Co
•
Filing: 1976-01-21
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Granted: 1977-06-14
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Expires: 1996-01-21
Abstract
Abstract Unsaturated polyester resins are produced which are modified with a low cost dicyclopentadiene concentrate. They are equal to or superior to the known resins containing a high purity dicyclopentadiene concentrate.
Inventors
- 👤 Donald L. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:29
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553; C08G63/91; C08G63/914; C08G63/918; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31616; Y10T428/3162
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
The unsaturated polyester produced by reacting: A. a glycol, B. an olefinically unsaturated dicarboxylic acid or its corresponding anhydride, C. a saturated dicarboxylic acid or its corresponding anhydride, and D. an effective amount of a dicyclopentadiene concentrate comprising about 60 to about 90 percent by weight of dicyclopentadiene and about 5 to about 30 percent by weight of the mixed Diels Alder dimers of butadiene, piperylene, isoprene, cyclopentadiene and methyl cyclopentadiene.
Claim 2
Dependent Claim
71 words
The unsaturated polyester produced by reacting: A. a glycol, B. an olefinically unsaturated dicarboxylic acid or its corresponding anhydride, C. a saturated dicarboxylic acid or its corresponding anhydride, and D. an effective amount of a dicyclopentadiene concentrate comprising about 60 to about 90 percent by weight of dicyclopentadiene and about 5 to about 30 percent by weight of the mixed Diels Alder dimers of butadiene, piperylene, isoprene, cyclopentadiene and methyl cyclopentadiene.
Claim 3
Dependent Claim
22 words
The polyester as set forth in claim 1 wherein A. is propylene glycol, B. is maleic anhydride and C. is phthalic anhyride.
Claim 4
Dependent Claim
14 words
The unsaturated polyester resin of claim 1 blended with a liquid ethylenically unsaturated monomer.
Claim 5
Dependent Claim
24 words
The unsaturated polyester of claim 3 wherein the weight ratio of polyester to monomer is in the range from about 4:1 to about 1:2.
Claim 6
Dependent Claim
10 words
A glass fiber laminate with the blend of claim 3.
Claim 7
Dependent Claim
10 words
A glass fiber laminate with the blend of claim 4.
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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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |