Patent US4595743A successfully refreshed from Google Patents.
US4595743A
Expired / Lapsed
US
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High modulus polyurea elastomers prepared with amine-initiated polyols
Assignee: Dow Chemical Co
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Filing: 1985-01-22
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Granted: 1986-06-17
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Expires: 2005-01-22
Abstract
Abstract A polyurea or polyurea-polyurethane elastomer which is the reaction product of reaction mixture comprising (a) an organic polyisocyanate, (b) a low equivalent weight aromatic amine chain extender in an amount from about 15 to 60 parts by weight based on the weight of isocyanate reactive components present in said reaction mixture, (c) an amount of an amine-initiated polyol sufficient to provide the elastomer with a measurably decreased brittleness at demold as compared to a similar elastomer prepared in the absence of said amine initiated polyol.
Inventors
- 👤 Michael K. Laughner
- 👤 James R. Porter
- 👤 Lee M. Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:52
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G2120/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
85 words
A polyurea or polyurea-polyurethane elastomer which is the reaction product of reaction mixture comprising (a) an organic polyisocyanate, (b) a low equivalent weight aromatic amine chain extender in an amount from about 15 to 60 parts by weight based on the weight of isocyanate reactive components present in said reaction mixture, (c) an amount of an amine-initiated polyol sufficient to provide the elastomer with a measurably decreased brittleness at demold as compared to a similar elastomer prepared in the absence of said amine initiated polyol.
Claim 2
Dependent Claim
85 words
A polyurea or polyurea-polyurethane elastomer which is the reaction product of reaction mixture comprising (a) an organic polyisocyanate, (b) a low equivalent weight aromatic amine chain extender in an amount from about 15 to 60 parts by weight based on the weight of isocyanate reactive components present in said reaction mixture, (c) an amount of an amine-initiated polyol sufficient to provide the elastomer with a measurably decreased brittleness at demold as compared to a similar elastomer prepared in the absence of said amine initiated polyol.
Claim 3
Dependent Claim
19 words
The elastomer of claim 1 wherein the amine-initiated polyol is initiated with ammonia, methylamine, ethylene diamine, piperazine or aminoethylpiperazine.
Claim 4
Dependent Claim
18 words
The elastomer of claim 2 wherein the amine-initiated polyol has a molecular weight of about 100 to 1000.
Claim 5
Dependent Claim
18 words
The elastomer of claim 2 wherein the amine-initiated polyol has a molecular weight of about 1000 to 8,000.
Claim 6
Dependent Claim
16 words
The elastomer of claim 3 or 4 wherein the amine-initiated polyol is an aminoethylpiperazine initiated polyol.
Claim 7
Dependent Claim
39 words
The elastomer of claim 5 wherein the amine initiated polyol comprises a mixture of an aminoethyl piperazine initiated polyol having a molecular weight of about 1000-8000 and aminoethylpiperazine initiated polyol having a molecular weight of about 150 to 1000.
Claim 8
Dependent Claim
31 words
The elastomer of claim 1 wherein the aromatic amine chain extender has a functionality of about 2 to 4 and is substituted at all carbon atoms ortho to each amino group.
Claim 9
Dependent Claim
37 words
The elastomer of claim 7 wherein the aromatic amine chain extender is present in an amount from about 25 to 35% by weight based on the weight of the isocyanate reactive components present in the reaction mixture.
Claim 10
Dependent Claim
33 words
The elastomer of claim 8 wherein the amine initiated polyol has a molecular weight from about 100-1000 and comprises about 5-30 percent by weight of isocyanate reactive components present in the reaction mixture.
Claim 11
Dependent Claim
34 words
The elastomer of claim 8 wherein the amine initiated polyol has a molecular weight from about 1000-8000 and comprises from about 20-65 percent by weight of isocyanate reactive component present in the reaction mixture.
Claim 12
Dependent Claim
39 words
The elastomer of claim 8 wherein the amine initiated polyol comprises a mixture of an aminoethyl piperazine initiated polyol having a molecular weight of about 1000-8000 and aminoethylpiperazine initiated polyol having a molecular weight of about 150 to 1000.
Claim 13
Dependent Claim
32 words
The elastomer of claim 7 wherein the amine chain extender is present in an amount from about 35 to 55 percent by weight based on the weight of all isocyanate reactive components.
Claim 14
Dependent Claim
34 words
The elastomer of claim 12 wherein the amine initiated polyol has a molecular weight from about 100-1000 and comprises from about 5-30 percent by weight of isocyanate reactive components present in the reaction mixture.
Claim 15
Dependent Claim
34 words
The elastomer of claim 12 wherein the amine initiated polyol has a molecular weight from about 1000-8000 and comprises from about 20-65 percent by weight of isocyanate reactive component present in the reaction mixture.
Claim 16
Dependent Claim
39 words
The elastomer of claim 12 wherein the amine initiated polyol comprises a mixture of an aminoethyl piperazine initiated polyol having a molecular weight of about 1000-8000 and aminoethylpiperazine initiated polyol having a molecular weight of about 150 to 1000.
Claim 17
Dependent Claim
15 words
The elastomer of claim 8 or 12 wherein the amine chain extender is diethyltoluene diamine.
Claim 18
Dependent Claim
33 words
The elastomer of claim 1, 8 or 12 further comprising a relatively high equivalent weight polyahl is selected from the group consisting of polyether polyol, polyester polyols, amine terminated polyethers, and mixtures thereof.
Claim 19
Dependent Claim
21 words
The elastomer of claim 7 wherein the relatively high equivalent weight polyahl has a molecular weight from about 200 to 8000.
Claim 20
Dependent Claim
39 words
An active hydrogen-containing composition comprising from about 15-60 percent by weight of an aromatic polyamine chain extender and from about 3-65% by weight of an amine initiated polyol, based on the weight of isocyanate-reaction materials contained in the composition.
Claim 21
Dependent Claim
39 words
An active hydrogen-containing composition comprising from about 15-60 percent by weight of an aromatic polyamine chain extender and from about 3-65% by weight of an amine initiated polyol, based on the weight of isocyanate-reaction materials contained in the composition.
Claim 22
Dependent Claim
16 words
The composition of claim 19 further comprising a relatively high equivalent weight polyol or amine-terminated polyether.
Claim 23
Dependent Claim
20 words
The composition of claim 19 wherein the amine-initiated polyol is initiated with ammonia, methylamine, ethylene diamine, piperazine or aminoethyl piperizine.
References Cited (Backward Citations)
US4298701A
Cited
US4442235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |