Patent US4609684A successfully refreshed from Google Patents.
US4609684A
Expired / Lapsed
US
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Rim products made from isatoic anhydride derivatives of polyoxyalkylene polyamines
Assignee: Texaco Inc
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Filing: 1985-06-21
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Granted: 1986-09-02
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Expires: 2005-06-21
Abstract
Abstract Reaction injection molded (RIM) elastomers are made in a one-shot process from certain aromatic-amine amides which comprise the reaction product of a polyoxyalkylene polyamine selected from the group consisting of diamines, triamines and mixtures thereof, and having an average molecular weight of above about 3000 and an isatoic anhydride of the formula: ##STR1## where R is selected from the group consisting of hydrogen, alkyl, nitro, halo, hydroxy, amino and cyano and n is a number of 1-4. Such elastomers have improved tensile strength, tear strength and elongation properties.
Inventors
- 👤 Robert A. Grigsby, Jr.
- 👤 Richard J. G. Dominguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:26
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5036; C08G18/5039; C08G2120/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A reaction injection molded elastomer made from an aromatic isocyanate and a compound comprising a reaction product of a polyoxyalkylene polyamine selected from the group consisting of triamines wherein the alkylene is ethylene, propylene or butylene, having an average molecular weight of about 400 to 10,000 and diamines of the formula: ##STR10## wherein x is an integer of at least about 2.6 to 84 and R is hydrogen, methyl or ethyl, and an isatoic anhydride of the formula: ##STR11## where B is selected from the group consisting of hydrogen, alkyl, nitro, halo, hydroxy, amino and cyano, and n is a number of 1-4.
Claim 2
Dependent Claim
103 words
A reaction injection molded elastomer made from an aromatic isocyanate and a compound comprising a reaction product of a polyoxyalkylene polyamine selected from the group consisting of triamines wherein the alkylene is ethylene, propylene or butylene, having an average molecular weight of about 400 to 10,000 and diamines of the formula: ##STR10## wherein x is an integer of at least about 2.6 to 84 and R is hydrogen, methyl or ethyl, and an isatoic anhydride of the formula: ##STR11## where B is selected from the group consisting of hydrogen, alkyl, nitro, halo, hydroxy, amino and cyano, and n is a number of 1-4.
Claim 3
Dependent Claim
20 words
A reaction injection molded elastomer as in claim 1 where R is methyl and the traimine is a poloxypropylene triamine.
Claim 4
Dependent Claim
27 words
A reaction injection molded elastomer as in claim 1 wherein the polyoxyalkylene polyamine is a polyoxypropylene triamine having an average molecular weight of about 400 to 10,000.
Claim 5
Dependent Claim
23 words
A reaction injection molded elastomer as in claim 3 wherein the triamine has a molecular weight between above about 3200 to about 7000.
Claim 6
Dependent Claim
22 words
A reaction injection molded elastomer as in claim 4 wherein the triamine has a molecular weight between above about 4500 to 5500.
Claim 7
Dependent Claim
19 words
A reaction injection molded elastomer as in claim 1 wherein x is an integer from about 41 to 84.
References Cited (Backward Citations)
US3256213A
Cited
US3808250A
Cited
US3975428A
Cited
US4016143A
Cited
US4260557A
Cited
US4169206A
Cited
US4136091A
Cited
US4191706A
Cited
US4180644A
Cited
US4194070A
Cited
US4239700A
Cited
US4328322A
Cited
EP0081701A1
Cited
US4515981A
Cited
US4530941A
Cited
US4504278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |