US4474901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction injection molded elastomers made using high molecular weight amine terminated polyethers and small amounts of low molecular weight amine terminated polyethers
Assignee: Huntsman Corp
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Filing: 1983-06-08
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Granted: 1984-10-02
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Expires: 2003-06-08
Abstract
Abstract The invention relates to reaction injection molded elastomers derived from high molecular weight amine terminated polyethers having greater than 50 percent of their active hydrogens in the form of amine hydrogens, low molecular weight amine terminated polyethers and a polyisocyanate. The reaction injection molded (RIM) elastomers of this invention are useful, for example, as automobile body parts.
Inventors
- 👤 Richard J. G. Dominguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G2120/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
A reaction injection molded elastomer made by reacting in a closed mold high molecular weight amine terminated polyethers of greater than about 2,500 average molecular weight, low molecular weight amine terminated polyethers of the formula R(y) x NH 2 where R=an initiating radical for oxyalkylation having a functionality of from about 2 to 6; y=oxyalkylene, including oxyethylene, oxypropylene and/or oxybutylene; x=about 2 to 15 wherein the molecular weight is less than about 1,000, and a polyisocyanate.
Claim 2
Dependent Claim
76 words
A reaction injection molded elastomer made by reacting in a closed mold high molecular weight amine terminated polyethers of greater than about 2,500 average molecular weight, low molecular weight amine terminated polyethers of the formula R(y) x NH 2 where R=an initiating radical for oxyalkylation having a functionality of from about 2 to 6; y=oxyalkylene, including oxyethylene, oxypropylene and/or oxybutylene; x=about 2 to 15 wherein the molecular weight is less than about 1,000, and a polyisocyanate.
Claim 3
Dependent Claim
24 words
An elastomer as in claim 1 wherein the high molecular weight amine terminated polyethers have an average molecular weight of about 4,000 or more.
Claim 4
Dependent Claim
22 words
An elastomer as in claim 1 wherein the low molecular weight amine terminated polyether is a triamine of about 400 molecular weight.
Claim 5
Dependent Claim
55 words
A reaction injection molded elastomer made by reacting in a closed mold high molecular weight amine terminated polyethers of greater than about 2,500 average molecular weight, lower molecular weight amine terminated polyether wherein the low molecular weight amine terminated polyether is trifunctional and has a molecular weight of less than about 1,000 and a polyisocyanate.
Claim 6
Dependent Claim
55 words
A reaction injection molded elastomer made by reacting in a closed mold high molecular weight amine terminated polyethers of greater than about 2,500 average molecular weight, lower molecular weight amine terminated polyether wherein the low molecular weight amine terminated polyether is trifunctional and has a molecular weight of less than about 1,000 and a polyisocyanate.
Claim 7
Dependent Claim
24 words
An elastomer as in claim 4 wherein the high molecular weight amine terminated polyethers have an average molecular weight of about 4,000 or more.
Claim 8
Dependent Claim
22 words
An elastomer as in claim 4 wherein the low molecular weight amine terminated polyether is a triamine of about 400 molecular weight.
Claim 9
Dependent Claim
39 words
A reaction injection molded elastomer made by reacting in a closed mold high molecular weight amine terminated polyethers of greater than about 2,500 molecular weight, a low molecular weight amine terminated polyether of the formula ##STR4## wherein x+y+z=about 5.3.
Claim 10
Dependent Claim
39 words
A reaction injection molded elastomer made by reacting in a closed mold high molecular weight amine terminated polyethers of greater than about 2,500 molecular weight, a low molecular weight amine terminated polyether of the formula ##STR4## wherein x+y+z=about 5.3.
Claim 11
Dependent Claim
24 words
An elastomer as in claim 7 wherein the high molecular weight amine terminated polyethers have an average molecular weight of about 4,000 or more.
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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |