US4546142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting styrene emissions in unsaturated polyester resins
Assignee: Sunoco Inc R&M
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Filing: 1985-01-08
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Granted: 1985-10-08
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Expires: 2005-01-08
Abstract
Abstract An unsaturated polyester exhibiting low styrene emissions comprises conventional phthalic and maleic anhydrides together with specific amounts of diethylene glycol, styrene, and a particular type of paraffin wax.
Inventors
- 👤 Leonard M. Walewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:38
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
77 words
Unsaturated polyester composition comprising (A) about 62 to about 67% by weight of a base resin consisting essentially of about 100 to about 120 mole % diethylene glycol about 55 to about 75 mole % maleic anhydride about 25 to about 45 mole % phthalic anhydride about 0.05 to about 0.25 weight % paraffin wax having a melting point of about 140° to about 145° F., and (B) about 33 to about 38%, by weight, of styrene.
Claim 2
Dependent Claim
77 words
Unsaturated polyester composition comprising (A) about 62 to about 67% by weight of a base resin consisting essentially of about 100 to about 120 mole % diethylene glycol about 55 to about 75 mole % maleic anhydride about 25 to about 45 mole % phthalic anhydride about 0.05 to about 0.25 weight % paraffin wax having a melting point of about 140° to about 145° F., and (B) about 33 to about 38%, by weight, of styrene.
Claim 3
Dependent Claim
35 words
The composition of claim 1 made by a process wherein the wax is added, in a molten state, to the cooked resin dissolved in styrene, at a temperature of about 110° to about 130° F.
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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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |