Patent US4124570A successfully refreshed from Google Patents.
US4124570A
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US
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Poly(neopentyl terephthalate/trimellitate)thermosetting resin
Assignee: Goodyear Tire and Rubber Co
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Filing: 1977-06-10
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Granted: 1978-11-07
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Expires: 1997-06-10
Abstract
Abstract This invention relates to thermosetting copolyesters of terephthalic acid, trimellitic acid and neopentyl glycol units. The compositions can vary from about 95/5 neopentyl terephthalate trimellitate to about 85/15 neopentyl terephthalate trimellitate. They can be cured to form excellent coatings on industrial goods and consumer items such as outdoor furniture.
Inventors
- 👤 Anthony S. Scheibelhoffer
- 👤 Richard E. Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:19
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
71 words
Poly(neopentyl terephthalate/trimellitate) thermosetting copolyester resin comprising from 95/5 to 85/15 neopentyl terephthalate/trimellitate formed of neopentyl polyester having an intrinsic viscosity of from about 0.077 to 0.120 (determined by a vibrating reed viscometer) joined by units of trimellitic anhydride, the copolymer having a hydroxyl number of from 30 to 50, an acid number of less than 15, an intrinsic viscosity of about 0.185 and a Tg of not less than 60° C.
Claim 2
Dependent Claim
71 words
Poly(neopentyl terephthalate/trimellitate) thermosetting copolyester resin comprising from 95/5 to 85/15 neopentyl terephthalate/trimellitate formed of neopentyl polyester having an intrinsic viscosity of from about 0.077 to 0.120 (determined by a vibrating reed viscometer) joined by units of trimellitic anhydride, the copolymer having a hydroxyl number of from 30 to 50, an acid number of less than 15, an intrinsic viscosity of about 0.185 and a Tg of not less than 60° C.
Claim 3
Dependent Claim
80 words
The method of making the copolymer of claim 1 which comprises reacting dimethyl terephthalate with neopentyl glycol to form a low molecular weight polymer having an intrinsic viscosity of from 0.077 to 0.120 and then reacting this polymer with trimellitic anhydride and condensing the product to form a polymer with a hydroxyl number of from 30 to 50, an acid number of less than 15, an intrinsic viscosity of about 0.185 and a Tg of not less than 60° C.
References Cited (Backward Citations)
US3407112A
Cited
US3466348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |