Patent US4038256A successfully refreshed from Google Patents.
US4038256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonstaining polyurethane from cycloaliphatic or aliphatic diisocyanates and polyhexenediol-phthalates
Assignee: Goodyear Tire and Rubber Co
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Filing: 1975-11-24
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Granted: 1977-07-26
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Expires: 1995-11-24
Abstract
Abstract Laminates with staining rubber stocks can be made by adhering to the staining rubber stocks a nondiscoloring and nonstaining polyurethane comprising the reaction product of a mol of polyester of 1800 to 3500 molecular weight, 1.3 to 3.2 mols of a cycloaliphatic or an aliphatic diisocyanate and curing with 0.2 to 2.0 mols of an organic diamine or polyol of the nonstaining type, the polyester being polyhexanediol-ortho-phthalate or a blend of 50 to 80 percent of polyhexanediol-ortho-phthalate and 50 to 20 percent of polyhexanediol isophthalate.
Inventors
- 👤 Anthony F. Finelli
- 👤 Jeffrey W. Saracsan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
In a nondiscoloring polyurethane comprising the reaction product of a mol of a polyester of 1800 to 3500 molecular weight, 1.3 to 3.2 mols of a diisocyanate selected from the group consisting of cycloaliphatic and aliphatic and 0.2 to 2.0 mols of a curative selected from the group consisting of organic diamine having no amino groups attached to a benzenoid carbon atom, and a polyol having a molecular weight less than 500 and mixtures of these, the improvement wherein the polyester is polyhexanedlol-ortho-phthalate or a blend of 50 to 80 percent of polyhexanediol-ortho-phthalate and 50 to 20 percent of polyhexanediol isophthalate.
Claim 2
Dependent Claim
101 words
In a nondiscoloring polyurethane comprising the reaction product of a mol of a polyester of 1800 to 3500 molecular weight, 1.3 to 3.2 mols of a diisocyanate selected from the group consisting of cycloaliphatic and aliphatic and 0.2 to 2.0 mols of a curative selected from the group consisting of organic diamine having no amino groups attached to a benzenoid carbon atom, and a polyol having a molecular weight less than 500 and mixtures of these, the improvement wherein the polyester is polyhexanedlol-ortho-phthalate or a blend of 50 to 80 percent of polyhexanediol-ortho-phthalate and 50 to 20 percent of polyhexanediol isophthalate.
Claim 3
Dependent Claim
20 words
The polyurethane of claim 1 wherein the diisocyanate is selected from the group consisting of 4,4'-dicyclohexylmethane diisocyanate and isophorone diisocyanate.
Claim 4
Dependent Claim
20 words
The polyurethane of claim 1 wherein the curative is selected from the group consisting of isophorone diamine and ethylene diamine.
Claim 5
Dependent Claim
16 words
The polyurethane of claim 1 wherein the polyester has a molecular weight of 2200 to 3000.
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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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |