US4525491A
Expired / Lapsed
US
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Process for producing a polyurethane elastomer by reaction injection molding
Assignee: AGC Inc
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Filing: 1983-12-20
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Granted: 1985-06-25
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Expires: 2003-12-20
Abstract
Abstract A process for producing a shaped article of a non-cellular or microcellular polyurethane elastomer by reaction injection molding by using at least two components of (A) a polyol component comprising a high molecular weight polyol and a chain extender as essential ingredients and (B) an isocyanate component comprising a polyisocyanate compound as essential ingredient, characterized in that substantially all or at least 80% by weight of said high molecular weight polyol is composed of a polyoxyalkylene polyol, and the polyoxyalkylene polyol is a single or mixed polyoxyalkylene polyol which has an average hydroxyl number of from 2.0 to 3.5 and an average hydroxyl value of from 15 to 60 and contains at least 5% by weight, in an average, of oxyethylene groups at the terminal portions of the oxyalkylene chain and in which the total oxyethylene group content is, in an average, less than 21% by weight and the average unsaturated monool content is at most 0.085 meq/g.
Inventors
- 👤 Shigeyuki Narisawa
- 👤 Masahiko Funaki
- 👤 Hiroaki Kojima
- 👤 Kazuhiko Kuga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/40; C08G18/48; C08G18/4833; C08G18/4837; C08G18/4841; C08G18/4866; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0066; C08G2120/00; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
158 words
A process for producing a shaped article of a non-cellular or microcellular polyurethane elastomer by reaction injection molding by using at least two components of (A) a polyol component comprising a high molecular weight polyol and a chain extender as essential ingredients and (B) an isocyanate component comprising a polyisocyanate compound as essential ingredient, characterized in that substantially all or at least 80% by weight of said high molecular weight polyol is composed of a polyoxyalkylene polyol, and the polyoxyalkylene polyol is a single or mixed polyoxyalkylene polyol which has an average hydroxyl number of from 2.0 to 3.5 and an average hydroxyl value of from 15 to 60 and contains at least 5% by weight, on an average, of oxyethylene groups at the terminal portions of the oxyalkylene chain and in which the total oxyethylene group content is, on an average, less than 21% by weight and the average unsaturated monool content is at most 0.085 meq/g.
Claim 2
Dependent Claim
158 words
A process for producing a shaped article of a non-cellular or microcellular polyurethane elastomer by reaction injection molding by using at least two components of (A) a polyol component comprising a high molecular weight polyol and a chain extender as essential ingredients and (B) an isocyanate component comprising a polyisocyanate compound as essential ingredient, characterized in that substantially all or at least 80% by weight of said high molecular weight polyol is composed of a polyoxyalkylene polyol, and the polyoxyalkylene polyol is a single or mixed polyoxyalkylene polyol which has an average hydroxyl number of from 2.0 to 3.5 and an average hydroxyl value of from 15 to 60 and contains at least 5% by weight, on an average, of oxyethylene groups at the terminal portions of the oxyalkylene chain and in which the total oxyethylene group content is, on an average, less than 21% by weight and the average unsaturated monool content is at most 0.085 meq/g.
Claim 3
Dependent Claim
96 words
The process according to claim 1, wherein the polyoxyalkylene polyol comprises from 51 to 100% by weight of (a) a polyoxyalkylene triol having a hydroxyl value of from 15 to 60, an oxyethylene group content of less than 15% by weight and an unsaturated monool content of at most 0.085 meq/g, and/or (b) a polyoxyalkylene diol having a hydroxyl value of from 15 to 60, an oxyethylene group content of less than 21% by weight and an unsaturated monool content of at most 0.080 meq/g and from 0 to 49% by weight of other polyoxyalkylene polyol.
Claim 4
Dependent Claim
34 words
The process according to claim 2, wherein the polyoxyalkylene polyol comprises from 70 to 100% by weight of the polyoxyalkylene triol (a) and from 0 to 30% by weight of other polyoxyalkylene polyol (c).
Claim 5
Dependent Claim
34 words
The process according to claim 3, wherein the polyoxyalkylene polyol comprises from 70 to 98% by weight of the polyoxyalkylene triol (a) and from 2 to 30% by weight of (c) other polyoxyalkylene polyols.
Claim 6
Dependent Claim
22 words
The process according to claim 3, wherein the polyoxyalkylene polyol has an average oxyethylene group content of less than 15% by weight.
Claim 7
Dependent Claim
20 words
The process according to claim 3, wherein the polyoxyalkylene polyol has an average hydroxyl number of from 2.1 to 2.8.
Claim 8
Dependent Claim
20 words
The process according to claim 3, wherein the polyoxyalkylene polyol has an average hydroxyl value of from 20 to 40.
Claim 9
Dependent Claim
21 words
The process according to claim 3, wherein the polyoxyalkylene polyol has an average unsaturated monool content of at most 0.080 meq/g.
Claim 10
Dependent Claim
33 words
The process according to claim 2, wherein the polyoxyalkylene triol (a) is a polyoxypropylene oxyethylene triol wherein substantially all of the oxyethylene groups are present at the terminal portions of the oxyalkylene chain.
Claim 11
Dependent Claim
22 words
The process according to claim 9, wherein the polyoxyalkylene triol (a) has an oxyethylene group content of at most 10% by weight.
Claim 12
Dependent Claim
20 words
The process according to claim 9, wherein the polyoxyalkylene triol (a) has a hydroxyl value of from 20 to 40.
Claim 13
Dependent Claim
21 words
The process according to claim 9, wherein the polyoxyalkylene triol (a) has an unsaturated monool content of at most 0.080 meq/g.
Claim 14
Dependent Claim
27 words
The process according to claim 3, wherein the polyoxyalkylene polyol (c) is a polyoxypropylene oxyethylene polyol having an oxyethylene group content of at most 35% by weight.
Claim 15
Dependent Claim
27 words
The method according to claim 13, wherein the polyoxyalkylene polyol (c) is a polyoxypropylene oxyethylene diol having an oxyethylene group content of at most 30% by weitht.
Claim 16
Dependent Claim
33 words
The process according to claim 2, wherein polyoxyalkylene polyol comprises from 60 to 95% by weight of the polyoxyalkylene diol (b) and from 5 to 40% by weight of (d) other polyoxyalkylene polyol.
Claim 17
Dependent Claim
34 words
The process according to claim 15, wherein the polyoxyalkylene polyol comprises from 60 to 90% by weight of the polyoxyalkylene diol (b) and from 10 to 40% by weight of the polyoxyalkylene polyol (d).
Claim 18
Dependent Claim
22 words
The process according to claim 15, wherein the polyoxyalkylene polyol has an average oxyethylene group content of at least 8% by weight.
Claim 19
Dependent Claim
20 words
The process according to claim 15, wherein the polyoxyalkylene polyol has an average hydroxyl number of from 2.1 to 2.49.
Claim 20
Dependent Claim
20 words
The process according to claim 15, wherein the polyoxyalkylene polyol has an average hydroxyl value of from 20 to 40.
Claim 21
Dependent Claim
21 words
The process according to claim 15, wherein the polyoxyalkylene polyol has an average unsaturated monool content of at most 0.070 meq/g.
Claim 22
Dependent Claim
32 words
The process according to claim 2, wherein the polyoxyalkylene diol (b) is a polyoxypopyleneoxyethylene diol wherein substantially all of the oxyethylene groups are present at the terminal portions of the oxyalkylene chain.
Claim 23
Dependent Claim
22 words
The process according to claim 21, wherein the polyoxyalkylene diol (b) has an oxyethylene group content of less than 15% by weight.
Claim 24
Dependent Claim
20 words
The process according to claim 21, wherein the polyoxyalkylene diol (b) has a hydroxyl value of from 20 to 40.
Claim 25
Dependent Claim
21 words
The process according to claim 21, wherein the polyoxyalkylene diol (b) has an unsaturated monool content of at most 0.070 meq/g.
Claim 26
Dependent Claim
26 words
The process according to claim 15, wherein the polyoxyalkylene polyol (d) is a polyoxypropyleneoxyethylene polyol having an oxyethylene group content of at most 35% by weight.
Claim 27
Dependent Claim
22 words
The process according to claim 25, wherein the polyoxyalkylene polyol (d) has an oxyethylene group content of at most 30% by weight.
Claim 28
Dependent Claim
41 words
The process according to claim 2, wherein the polyoxyalkylene polyol comprises from 60 to 100% by weight of a mixture of the polyoxyalkylene triol (a) and the polyoxyalkylene diol (b), and from 0 to 40% by weight of other polyoxyalkylene polyol.
Claim 29
Dependent Claim
20 words
The process according to claim 27, wherein the polyoxyalkylene polyol has an average hydroxyl number of from 2.1 to 2.8.
Claim 30
Dependent Claim
20 words
The process according to claim 27, wherein the polyoxyalkylene polyol has an average hydroxyl value of from 20 to 40.
Claim 31
Dependent Claim
21 words
The process according to claim 27, wherein the polyoxyalkylene polyol has an average oxyethylene content of at least 10% by weight.
Claim 32
Dependent Claim
21 words
The process according to claim 27, wherein the polyoxyalkylene polyol has an average unsaturated monool content of at most 0.080 meq/g.
Claim 33
Dependent Claim
39 words
The process according to claim 27, wherein substantially all of the components of the polyoxyalkylene polyol are composed of a polyoxypropyleneoxyalkylene polyol wherein substantially all of the oxyethylene groups are preset at the terminal portions of the oxyalkylene chain.
Claim 34
Dependent Claim
62 words
The process according to claim 1, wherein the polyoxyalkylene polyol is a mixed polyoxyalkylene polyol which has an average hydroxyl number of from 2.1 to 2.8, an average hydroxyl value of from 20 to 40, an oxyethylene group content of at least 10% by weight and less than 21% by weight and an average unsaturated monool content of at most 0.085 meq/g.
Claim 35
Dependent Claim
22 words
The process according to claim 33, wherein the mixed polyoxyalkylene polyol has an average unsaturated monool content of at most 0.080 meq/g.
Claim 36
Dependent Claim
19 words
The process according to claim 1, wherein the chain extender is a dihydric or trihydric alcohol and/or alkanol amine.
Claim 37
Dependent Claim
15 words
The process according to claim 1, wherein the polyurethane elastomer is a microcellular polyurethane elastomer.
Claim 38
Dependent Claim
15 words
A shaped article of a polyurethane elastomer produced by the process according to claim 1.
Claim 39
Dependent Claim
13 words
The shaped article according to claim 37, which is an automotive exterior part.
Claim 40
Dependent Claim
15 words
The shaped article claim 38, which is the external shell structure of an automotive bumper.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |