US4098772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyurethanes prepared with small amounts of monohydric alcohols
Assignee: Pharmacia and Upjohn Co
•
Filing: 1976-03-11
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Granted: 1978-07-04
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Expires: 1996-03-11
Abstract
Abstract The processing temperatures of thermoplastic polyurethane elastomers are reduced, and the extrudability and the sensitivity to degradation by shear and by moisture are improved, by including a minute proportion (from 0.0005 to 0.05 equivalents, per equivalent of isocyanate) of a monohydric aliphatic alcohol in the reaction mixture (diisocyanate, polymeric diol and difunctional extender) employed to prepare thermoplastic polyurethane elastomers by the one-shot procedure.
Inventors
- 👤 Henry W. Bonk
- 👤 Benjamin S. Ehrlich
- 👤 Joseph Pleckaitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/2805; C08G18/2815; C08G18/283; Y; Y10; Y10S; Y10S264/00; Y10S264/77
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
A thermoplastic polyurethane elastomer which is the product of a one-shot reaction of an organic diisocyanate, a polymeric diol, a difunctional extender and from 0.0005 equivalents to 0.05 equivalents, per equivalent of said diisocyanate, of a monohydric alcohol selected from the class consisting of dodecyl alcohol, stearyl alcohol, and the monobutyl ether of diethylene glycol.
Claim 2
Dependent Claim
55 words
A thermoplastic polyurethane elastomer which is the product of a one-shot reaction of an organic diisocyanate, a polymeric diol, a difunctional extender and from 0.0005 equivalents to 0.05 equivalents, per equivalent of said diisocyanate, of a monohydric alcohol selected from the class consisting of dodecyl alcohol, stearyl alcohol, and the monobutyl ether of diethylene glycol.
Claim 3
Dependent Claim
31 words
A thermoplastic polyurethane elastomer according to claim 1 wherein the overall ratio of equivalents of isocyanate to equivalents of active hydrogen containing materials is within the range of 0.95:1 to 1.10:1.
Claim 4
Dependent Claim
28 words
A thermoplastic polyurethane elastomer according to claim 1 wherein the amount of monohydric alcohol employed is within the range of 0.001 to 0.01 equivalents, per equivalent of diisocyanate.
Claim 5
Dependent Claim
28 words
A thermoplastic polyurethane elastomer according to claim 1 wherein the amount of monohydric alcohol employed is within the range of 0.001 to 0.01 equivalents per equivalent of diisocyanate.
Claim 6
Dependent Claim
87 words
A thermoplastic polyurethane elastomer which is the product of a one-shot reaction of: (a) 4,4'-methylenebis(phenyl isocyanate); (b) a polymeric diol having a molecular weight in the range of 500 to 3000; (c) a diol extender; and (d) from 0.0005 to 0.05 equivalents, per equivalent of said isocyanate, of a monohydric aliphatic alcohol selected from the class consisting of dodecyl alcohol, stearyl alcohol and the monobutyl ether of diethylene glycol; the ratio of isocyanate groups to hydroxyl groups being within the range of about 0.95:1 to about 1.10:1.
Claim 7
Dependent Claim
87 words
A thermoplastic polyurethane elastomer which is the product of a one-shot reaction of: (a) 4,4'-methylenebis(phenyl isocyanate); (b) a polymeric diol having a molecular weight in the range of 500 to 3000; (c) a diol extender; and (d) from 0.0005 to 0.05 equivalents, per equivalent of said isocyanate, of a monohydric aliphatic alcohol selected from the class consisting of dodecyl alcohol, stearyl alcohol and the monobutyl ether of diethylene glycol; the ratio of isocyanate groups to hydroxyl groups being within the range of about 0.95:1 to about 1.10:1.
Claim 8
Dependent Claim
16 words
A thermoplastic polyurethane elastomer according to claim 5 wherein the polymeric diol is a polycaprolactone diol.
Claim 9
Dependent Claim
16 words
A thermoplastic polyurethane elastomer according to claim 5 wherein the polymeric diol is a polytetramethylene glycol.
Claim 10
Dependent Claim
15 words
A thermoplastic polyurethane elastomer according to claim 1 wherein the organic diisocyanate is 4,4'-methylenebis(phenyl isocyanate).
References Cited (Backward Citations)
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |