Patent US3207385A successfully refreshed from Google Patents.
Patent US4565835A successfully refreshed from Google Patents.
US4565835A
Expired / Lapsed
US
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Diisocyanate
Assignee: Dow Chemical Co
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Filing: 1985-03-25
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Granted: 1986-01-21
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Expires: 2005-03-25
Abstract
Abstract A novel aliphatic diisocyanate, namely 1,4-bis(2-isocyanatoethyl)cyclohexane, is disclosed. Polyurethanes derived from this diisocyanate exhibit advantageous properties. Illustratively, polyurethane elastomers prepared from the above diisocyanate, a polymeric diol and a low molecular weight diol extender, possess significantly improved resilience properties and are useful in the preparation of automobile bumpers, fenders and the like.
Inventors
- 👤 Richard W. Oertel, III
- 👤 Benjamin W. Tucker
- 👤 Reinhard H. Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/757; C07; C07C; C07C17/00; C07C17/093; C07C17/16; C07C255/00; C07C265/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
32 words
In a polyurethane elastomer prepared by the reaction of an organic diisocyanate, a polymeric diol and a low molecular weight diol extender the improvement which comprises employing 1,4-bis(2-isocyanatoethyl)cyclohexane as the organic diisocyanate.
Claim 2
Dependent Claim
32 words
In a polyurethane elastomer prepared by the reaction of an organic diisocyanate, a polymeric diol and a low molecular weight diol extender the improvement which comprises employing 1,4-bis(2-isocyanatoethyl)cyclohexane as the organic diisocyanate.
Claim 3
Dependent Claim
26 words
A polyurethane elastomer according to claim 1 wherein the 1,4-bis(2-isocyanatoethyl)cyclohexane is present as the cis-isomer, the trans-isomer, or mixtures of the two isomers in any proportion.
References Cited (Backward Citations)
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US3624122A
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US3515740A
Cited
US3584045A
Cited
US3625986A
Cited
US3787469A
Cited
US4113705A
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |