US5356946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing reaction injection moldings
Assignee: Bayer Corp
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Filing: 1991-12-09
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Granted: 1994-10-18
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Expires: 2011-12-09
Abstract
Abstract Disclosed herein is a process for the preparation of a reaction injection molded elastomer comprising injecting a reaction mixture into a closed mold via a RIM machine, with the ratio of components being such that the isocyanate index is from about 70 to about 130, said reaction mixture comprising (a) an organic di- and/or polyisocyanate, (b) an amine terminated chain extender, and (c) a compound which is derived from the reaction of a polyfunctional acetoacetic acid ester and an aliphatic amine having amino groups of different reactivity.
Inventors
- 👤 Robson M. Mafoti
- 👤 Josef Sanders
- 👤 Robert P. Yeater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6529; C08G18/6795; C08G18/68; C08G18/69; C08G18/696; C08G2120/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A process for the preparation of a reaction injection molded elastomer comprising injecting a reaction mixture into a closed mold via a RIM machine, with the ratio of components being such that the isocyanate index is from about 70 to about 130, said reaction mixture comprising (a) an organic di- or/or polyisocyanate, (b) an amine terminated chain extender, and (c) a compound of the formula ##STR2## wherein A represents a polyfunctional radical left by the removal of the hydroxyl groups from a polyol of functionality n, R represents a aliphatic hydrocarbon radical, and n is an integer of from 2 to 6; wherein compound (c) is derived from the reaction of a polyfunctional acetoacetic acid ester and 1,5-diamino-2-methylpentane.
Claim 2
Dependent Claim
118 words
A process for the preparation of a reaction injection molded elastomer comprising injecting a reaction mixture into a closed mold via a RIM machine, with the ratio of components being such that the isocyanate index is from about 70 to about 130, said reaction mixture comprising (a) an organic di- or/or polyisocyanate, (b) an amine terminated chain extender, and (c) a compound of the formula ##STR2## wherein A represents a polyfunctional radical left by the removal of the hydroxyl groups from a polyol of functionality n, R represents a aliphatic hydrocarbon radical, and n is an integer of from 2 to 6; wherein compound (c) is derived from the reaction of a polyfunctional acetoacetic acid ester and 1,5-diamino-2-methylpentane.
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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) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |