US4435349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a reinforced rim elastomer
Assignee: Huntsman Corp
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Filing: 1982-04-05
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Granted: 1984-03-06
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Expires: 2002-04-05
Abstract
Abstract A method for making a high strength composite of a reinforcing mat impregnated with reaction injection molded (RIM) polyurethane elastomer is disclosed. The method comprises placing the reinforcing mat in a mold cavity and injecting into the mold cavity a formulation capable of forming a reaction injection molded polyurethane elastomer comprising a polyol of above about 500 equivalent weight, a chain extending agent, a delayed action catalyst and a polyisocyanate.
Inventors
- 👤 Richard J. G. Dominquez
- 👤 Doris M. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:27
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/48; B29C67/00; B29C67/24; B29C67/246; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G2120/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A method for making a high strength composite comprising a reinforcing mat impregnated with reaction injection molded polyurethane elastomer resin, the method comprising placing a reinforcing mat in a mold cavity and injecting into the mold cavity a polyol of about 5500 molecular weight based on a trihydric initiator, ethylene glycol, a stannic diester of a thiol acid and a polyisocyanate.
Claim 2
Independent Claim
61 words
A method for making a high strength composite comprising a reinforcing mat impregnated with reaction injection molded polyurethane elastomer resin, the method comprising placing a reinforcing mat in a mold cavity and injecting into the mold cavity a polyol of about 5500 molecular weight based on a trihydric initiator, ethylene glycol, a stannic diester of a thiol acid and a polyisocyanate.
Claim 3
Independent Claim
70 words
A method for making a high strength composite comprising a reinforcing mat impregnated with reaction injection molded polyurethane elastomer resin, the method comprising placing a reinforcing mat in a mold cavity and injecting into the mold cavity a polyol of above about 500 equivalent weight, a chain extending agent comprising an active hydrogen-containing compound of at least 2 functionality, a polyisocyanate and a catalyst consisting essentially of delayed action catalyst.
Claim 4
Independent Claim
70 words
A method for making a high strength composite comprising a reinforcing mat impregnated with reaction injection molded polyurethane elastomer resin, the method comprising placing a reinforcing mat in a mold cavity and injecting into the mold cavity a polyol of above about 500 equivalent weight, a chain extending agent comprising an active hydrogen-containing compound of at least 2 functionality, a polyisocyanate and a catalyst consisting essentially of delayed action catalyst.
Claim 5
Dependent Claim
15 words
A method as in claim 2 wherein the delayed action catalyst is a metal catalyst.
Claim 6
Dependent Claim
15 words
A method as in claim 3 wherein the delayed action catalyst is a tin catalyst.
Claim 7
Dependent Claim
19 words
A method as in claim 4 wherein the delayed action catalyst is a stannic diester of a thiol acid.
Claim 8
Dependent Claim
14 words
A method as in claim 2 wherein the reinforcing mat is a glass mat.
References Cited (Backward Citations)
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |