US4151345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making polyurethane utilizing nickel acetylacetonate
Assignee: Goodyear Tire and Rubber Co
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Filing: 1977-10-17
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Granted: 1979-04-24
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Expires: 1997-10-17
Abstract
Abstract A process for preparing polyurethanes comprising reacting a polyol with an organic polyisocyanate in the presence of a catalytic amount of nickel acetylacetonate, wherein the polyol and nickel acetylacetonates are held at elevated temperatures prior to being mixed with the polyisocyanate.
Inventors
- 👤 Donald V. Hillegass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/222
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
In a process for preparing molded polyurethanes consisting of reacting a catalyst-polyol mixture with an organic polyisocyanate wherein the catalyst-polyol mixture is held at an elevated temperature of 120° C. for prolonged periods, molding said polyurethane and demolding a cured article, the improvement of employing as the catalyst-polyol mixture 0.01 to 0.08 gram of nickel acetyl acetonate per 100 grams of polyol, wherein in said process the gelation time is in excess of one minute, the time required to obtain a tack-free surface is at least seven minutes, and the demolding time is eight minutes.
Claim 2
Dependent Claim
95 words
In a process for preparing molded polyurethanes consisting of reacting a catalyst-polyol mixture with an organic polyisocyanate wherein the catalyst-polyol mixture is held at an elevated temperature of 120° C. for prolonged periods, molding said polyurethane and demolding a cured article, the improvement of employing as the catalyst-polyol mixture 0.01 to 0.08 gram of nickel acetyl acetonate per 100 grams of polyol, wherein in said process the gelation time is in excess of one minute, the time required to obtain a tack-free surface is at least seven minutes, and the demolding time is eight minutes.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the polyol is polyalkyldiene diol.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the polyol is a hydroxylated copolymer of butadiene-styrene of a number average molecular weight of about 1000 to 3000.
References Cited (Backward Citations)
US2897181A
Cited
US2933462A
Cited
US3231597A
Cited
GB886186A
Cited
US3291660A
Cited
US3892715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |