US4120850A
Expired / Lapsed
US
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Polyether urethane polymers prepared from a copolymer of tetrahydrofuran and ethylene oxide
Assignee: EIDP Inc
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Filing: 1977-09-06
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Granted: 1978-10-17
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Expires: 1997-09-06
Abstract
Abstract A polyether urethane polymer which is the reaction product of (a) a difunctional copolymer of tetrahydrofuran and ethylene oxide or propylene oxide; (b) an organic diisocyanate; and (c) an aliphatic diol of 2 to 10 carbon atoms; Useful as an elastomer.
Inventors
- 👤 Engelbert Pechhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4854; C08G18/08; C08G18/10; C08G18/4833; C08G18/4837; C08G2380/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A polyether urethane polymer which is the reaction product of (a) a copolymer of tetrahydrofuran and ethylene oxide or propylene oxide, the copolymer containing about 20% to about 70%, by weight, of ethylene oxide or propylene oxide units and having a number average molecular weight of about 550 to about 3,000 and a hydroxyl functionality of 2.0; (b) an organic diisocynate; and (c) 1,4-butanediol or hydroquinone bis(betahydroxyethyl)ether.
Claim 2
Dependent Claim
67 words
A polyether urethane polymer which is the reaction product of (a) a copolymer of tetrahydrofuran and ethylene oxide or propylene oxide, the copolymer containing about 20% to about 70%, by weight, of ethylene oxide or propylene oxide units and having a number average molecular weight of about 550 to about 3,000 and a hydroxyl functionality of 2.0; (b) an organic diisocynate; and (c) 1,4-butanediol or hydroquinone bis(betahydroxyethyl)ether.
Claim 3
Dependent Claim
11 words
The polymer of claim 1, wherein the diisocyanate used is diphenylmethane-4,4'-diisocyanate.
Claim 4
Dependent Claim
11 words
The polymer of claim 1, wherein the diol used is 1,4-butanediol.
Claim 5
Dependent Claim
21 words
The polymer of claim 1, wherein the copolymer used has a number average molecular weight of about 650 to about 1,000.
Claim 6
Dependent Claim
56 words
A polyether urethane polymer which is the reaction product of (a) a copolymer of tetrahydrofuran and ethylene oxide, the copolymer containing about 35% to about 50%, by weight, of ethylene oxide units and having a number average molecular weight of about 650 to about 1,000 and a hydroxyl functionality of 2.0; (b) diphenylmethane-4,4'-diisocyanate; and (c) 1,4-butanediol.
Claim 7
Dependent Claim
56 words
A polyether urethane polymer which is the reaction product of (a) a copolymer of tetrahydrofuran and ethylene oxide, the copolymer containing about 35% to about 50%, by weight, of ethylene oxide units and having a number average molecular weight of about 650 to about 1,000 and a hydroxyl functionality of 2.0; (b) diphenylmethane-4,4'-diisocyanate; and (c) 1,4-butanediol.
Claim 8
Dependent Claim
118 words
A process for preparing a polyether urethane polymer, the process comprising (a) bringing together, under conditions suitable for reaction, (1) a copolymer of tetrahydrofuran and ethylene oxide or propylene oxide, the copolymer containing about 20% to about 70%, by weight, of ethylene oxide or propylene oxide units and having a number average molecular weight of about 550 to about 3,000 and a hydroxyl functionality of 2.0; and (2) a stoichiometric excess of an organic diisocyanate, to form a prepolymer; and then (b) bringing together, under conditions suitable for reaction, the prepolymer product of (a) and an amount of 1,4-butanediol or hydroquinone bis(betahydroxyethyl)ether calculated to give an isocyanate/hydroxyl mole ratio in the reaction mass of about 0.9-1.1 to 1.
Claim 9
Dependent Claim
118 words
A process for preparing a polyether urethane polymer, the process comprising (a) bringing together, under conditions suitable for reaction, (1) a copolymer of tetrahydrofuran and ethylene oxide or propylene oxide, the copolymer containing about 20% to about 70%, by weight, of ethylene oxide or propylene oxide units and having a number average molecular weight of about 550 to about 3,000 and a hydroxyl functionality of 2.0; and (2) a stoichiometric excess of an organic diisocyanate, to form a prepolymer; and then (b) bringing together, under conditions suitable for reaction, the prepolymer product of (a) and an amount of 1,4-butanediol or hydroquinone bis(betahydroxyethyl)ether calculated to give an isocyanate/hydroxyl mole ratio in the reaction mass of about 0.9-1.1 to 1.
Claim 10
Dependent Claim
11 words
The process of claim 6 wherein the diisocynate used is diphenylmethane-4,4'-diisocyanate.
Claim 11
Dependent Claim
11 words
The process of claim 6 wherein the diol used is 1,4-butanediol.
Claim 12
Dependent Claim
22 words
The process of claim 6 wherein the amount of diol is calculated to give an isocynate/hydroxyl mole ratio of 1.05 to 1.
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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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |