US4442235A
Expired / Lapsed
US
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Process and composition for the production of polyurethane elastomer moldings
Assignee: Bayer Corp
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Filing: 1983-05-09
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Granted: 1984-04-10
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Expires: 2003-05-09
Abstract
Abstract The present invention is directed to a process for the production of polyurethane elastomer moldings by reacting a reaction mixture in a closed mold, wherein said reaction mixture comprises: (a) an organic polyisocyanate; (b) an organic active hydrogen group-containing compound having a molecular weight of from 1800 to 12,000 and containing at least two active hydrogen groups; (c) 1,3,5-triethyl-2,6-diamino benzene and, optionally (d) a catalyst for the reaction between hydroxyl groups and isocyanate groups, wherein component (c) is present in an amount of from 25 to 35 percent by weight based on the combined weight of components (b) and (c), wherein the amounts of components (a), (b) and (c) are such that the isocyanate index of the reaction mixture is from about 90 to 110, and wherein all of said components are processed via a one-shot process whereby (a) is mixed simultaneously either with (b), (c) and (d) or with a non-reacted premixture of some or all of (b), (c) and (d).
Inventors
- 👤 Ronald P. Taylor
- 👤 John E. Dewhurst
- 👤 Saad M. Abouzahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6529; C08G18/30; C08G18/32; C08G18/3225; C08G18/3237; C08G18/324; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08G2120/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
159 words
In a process for the production of polyurethane elastomer moldings by reacting a reaction mixture in a closed mold, the improvement wherein said reaction mixture comprises: (a) an organic polyisocyanate; (b) an organic active hydrogen group-containing compound having a molecular weight of from 1800 to 12,000 and containing at least two active hydrogen groups, (c) 1,3,5-triethyl-2-6-diamino benzene and, optionally (d) a catalyst for the reaction between hydroxyl groups and isocyanate groups, wherein component (c) is present in an amount of from 25 to 35 percent by weight based on the combined weight of components (b) and (c), wherein the amounts of components (a), (b) and (c) are such that the isocyanate index of the reaction mixture is from about 90 to 110, and wherein all of said components are processed via a one-shot process whereby (a) is mixed simultaneously either with (b), (c) and (d) or with a non-reacted premixture of some or all of (b), (c) and (d).
Claim 2
Dependent Claim
159 words
In a process for the production of polyurethane elastomer moldings by reacting a reaction mixture in a closed mold, the improvement wherein said reaction mixture comprises: (a) an organic polyisocyanate; (b) an organic active hydrogen group-containing compound having a molecular weight of from 1800 to 12,000 and containing at least two active hydrogen groups, (c) 1,3,5-triethyl-2-6-diamino benzene and, optionally (d) a catalyst for the reaction between hydroxyl groups and isocyanate groups, wherein component (c) is present in an amount of from 25 to 35 percent by weight based on the combined weight of components (b) and (c), wherein the amounts of components (a), (b) and (c) are such that the isocyanate index of the reaction mixture is from about 90 to 110, and wherein all of said components are processed via a one-shot process whereby (a) is mixed simultaneously either with (b), (c) and (d) or with a non-reacted premixture of some or all of (b), (c) and (d).
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein component (b) is a polyether polyol and component (d) is present in an amount of from 0.001 to 10% by weight based on the amount of component (b).
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein component (b) is a polyether polyamine.
Claim 5
Dependent Claim
26 words
The process of claim 1, wherein said reaction mixture also includes a low molecular weight hydroxy functional organic compound having from 2 to 4 OH groups.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein said polyisocyanate is an aromatic polyisocyanate which is liquid at the processing temperature.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein said isocyanate is based on 4,4'-diisocyanato-diphenyl methane.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein said reaction mixture also includes glass reinforcement in the form of fibers and/or flakes.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein the isocyanate index is from 90 to 110.
Claim 10
Dependent Claim
50 words
An active hydrogen containing mixture comprising (i) an organic active hydrogen group-containing compound having a molecular weight of from 1800 to 12,000 and containing at least two active hydrogens, and (ii) from about 25 to about 35 percent by weight based on the weight of (i) and (ii) of 1,3,5-triethyl-2,6-diaminobenzene.
Claim 11
Dependent Claim
50 words
An active hydrogen containing mixture comprising (i) an organic active hydrogen group-containing compound having a molecular weight of from 1800 to 12,000 and containing at least two active hydrogens, and (ii) from about 25 to about 35 percent by weight based on the weight of (i) and (ii) of 1,3,5-triethyl-2,6-diaminobenzene.
Claim 12
Dependent Claim
13 words
The composition of claim 9, wherein said component (i) is a polyether polyol.
Claim 13
Dependent Claim
13 words
The composition of claim 9, wherein said component (i) is a polyether polyamine.
Claim 14
Dependent Claim
95 words
An active hydrogen group containing mixture comprising (i) an organic active hydrogen group containing compound having a molecular weight of from 1800 to 12,000 and containing at least two active hydrogens, (ii) 1,3,5-triethyl-2,6-diamino benzene, and (iii) from 0 to 95 percent by weight based on the combined weight of (ii) and (iii) of a low molecular weight hydroxy functional organic compound having from 2 to 4 hydroxyl groups, wherein the total weight of (ii) and (iii) is from about 25 to about 35 percent by weight based on the weight of (i), (ii) and (iii).
Claim 15
Dependent Claim
95 words
An active hydrogen group containing mixture comprising (i) an organic active hydrogen group containing compound having a molecular weight of from 1800 to 12,000 and containing at least two active hydrogens, (ii) 1,3,5-triethyl-2,6-diamino benzene, and (iii) from 0 to 95 percent by weight based on the combined weight of (ii) and (iii) of a low molecular weight hydroxy functional organic compound having from 2 to 4 hydroxyl groups, wherein the total weight of (ii) and (iii) is from about 25 to about 35 percent by weight based on the weight of (i), (ii) and (iii).
Claim 16
Dependent Claim
13 words
The composition of claim 12, wherein said component (i) is a polyether polyol.
Claim 17
Dependent Claim
13 words
The composition of claim 12, wherein said component (i) is a polyether polyamine.
References Cited (Backward Citations)
US4288564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |