US4314038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polyol RIM system possessing excellent thermal properties
Assignee: BASF Corp
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Filing: 1981-03-30
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Granted: 1982-02-02
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Expires: 2001-03-30
Abstract
Abstract A thermal dimensionally stable RIM polyurethane elastomer prepared by reacting an organic polyisocyanate, a polyoxyalkylene polyether polyol, and ethylene glycol wherein the reactants have a free-water content of less than 0.10 percent based on 100 parts of polyol plus glycol.
Inventors
- 👤 Robert A. Markovs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:38
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/08; C08G18/14; C08G18/65; C08G18/6552; C08G18/6558; C08G18/6564; C08G2120/00; Y; Y10; Y10S; Y10S264/00; Y10S264/83; Y10S528/00; Y10S528/903
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
45 words
A dimensionally stable reaction injection molded polyurethane elastomer comprising the reaction product of an organic polyisocyanate, a polyoxyalkylene polyether polyol, a blowing agent and ethylene glycol wherein said elastomer contains less than 0.10 percent free water prior to curing at 120° C. to 210° C.
Claim 2
Dependent Claim
45 words
A dimensionally stable reaction injection molded polyurethane elastomer comprising the reaction product of an organic polyisocyanate, a polyoxyalkylene polyether polyol, a blowing agent and ethylene glycol wherein said elastomer contains less than 0.10 percent free water prior to curing at 120° C. to 210° C.
Claim 3
Dependent Claim
30 words
The elastomer of claim 1 wherein said polyol is a graft polymer dispersion prepared by the in situ free-radical polymerization of an ethylenically unsaturated monomer or monomers in a polyol.
Claim 4
Dependent Claim
28 words
The elastomer of claim 1 wherein the concentration of said glycol is from 15 percent to 25 percent based on the total weight of polyol and ethylene glycol.
Claim 5
Dependent Claim
13 words
The elastomer of claim 1 wherein said polyisocyanate is carbodiimide modified diphenylmethane diisocyanate.
Claim 6
Dependent Claim
21 words
The elastomer of claim 2 wherein said unsaturated monomer is selected from the group consisting of acrylonitrile, styrene and methyl methacrylate.
Claim 7
Dependent Claim
67 words
A process for preparing a dimensionally stable reaction injection molded polyurethane elastomer which comprises (a) reacting an organic polyisocyanate, a polyoxyalkylene polyether polyol, a blowing agent and ethylene glycol, and (b) curing said elastomer at temperatures from 120° C. to 210° C., the improvement comprises employing a combination of said polyol and glycol in step (a) which contain a free water content of less than 0.10 percent.
Claim 8
Dependent Claim
67 words
A process for preparing a dimensionally stable reaction injection molded polyurethane elastomer which comprises (a) reacting an organic polyisocyanate, a polyoxyalkylene polyether polyol, a blowing agent and ethylene glycol, and (b) curing said elastomer at temperatures from 120° C. to 210° C., the improvement comprises employing a combination of said polyol and glycol in step (a) which contain a free water content of less than 0.10 percent.
Claim 9
Dependent Claim
30 words
The process of claim 6 wherein said polyol is a graft polymer dispersion prepared by the in situ free-radical polymerization of an ethylenically unsaturated monomer or monomers in a polyol.
Claim 10
Dependent Claim
28 words
The process of claim 6 wherein the concentration of said glycol is from 15 percent to 25 percent based on the total weight of polyol and ethylene glycol.
Claim 11
Dependent Claim
13 words
The process of claim 6 wherein said polyisocyanate is carbodiimide modified diphenylmethane diisocyanate.
Claim 12
Dependent Claim
21 words
The process of claim 6 wherein said unsaturated monomer is selected from the group consisting of acrylonitrile, styrene and methyl methacrylate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |