US4234714A
Expired / Lapsed
US
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Preparation of single-phase, urethane prepolymers from hydroxy-terminated diene polymers
Assignee: CASCHEM GROUP Inc
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Filing: 1979-03-29
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Granted: 1980-11-18
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Expires: 1999-03-29
Abstract
Abstract A process is described for the preparation of urethane prepolymers from hydroxy-terminated diene polymers and normally liquid, relatively non-volatile, aromatic polyisocyanates. The prepolymers are made at a temperature above about 150° C. to provide urethane prepolymer products that resist the tendency to form multiple phases or layers upon storage at room temperature.
Inventors
- 👤 Mason H. Earing
- 👤 Leonard H. Gielinski
- 👤 Paul F. Martin
- 👤 Glenn H. Petschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:58
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0666; C08G73/0672; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
67 words
A process for preparing urethane prepolymers resistant to the formation of multiple phases or layers upon storage which comprises reacting a viscous, normally liquid hydroxy-terminated polymer of conjugated diene of 4 to 8 carbon atoms and normally liquid, relatively non-volatile, aromatic polyisocyanate at a temperature above about 150° C. to form an isocyanate-terminated urethane prepolymer having an isocyanate group content of at least about 10 weight percent.
Claim 2
Dependent Claim
67 words
A process for preparing urethane prepolymers resistant to the formation of multiple phases or layers upon storage which comprises reacting a viscous, normally liquid hydroxy-terminated polymer of conjugated diene of 4 to 8 carbon atoms and normally liquid, relatively non-volatile, aromatic polyisocyanate at a temperature above about 150° C. to form an isocyanate-terminated urethane prepolymer having an isocyanate group content of at least about 10 weight percent.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein said polyisocyanate is trihydrocarbyl phosphate-modified methylenebis (phenylisocyanate).
Claim 4
Dependent Claim
12 words
A process according to claim 1 wherein said polyisocyanate is polyarylene polyisocyanate.
Claim 5
Dependent Claim
19 words
A process according to claim 1, 2 or 3 wherein said temperature is about 160° C. to 180° C.
Claim 6
Dependent Claim
15 words
A process according to claim 4 wherein said hydroxy-terminated diene polymer is a hydroxy-terminated polybutadiene.
Claim 7
Dependent Claim
19 words
A process according to claim 5 wherein said hydroxy-terminated diene polymer has a hydroxyl-functionality of about 2.1 to 2.6.
Claim 8
Dependent Claim
22 words
A process according to claim 6 wherein said hydroxy-terminated diene polymer has a majority of its unsaturation in the main hydrocarbon chain.
Claim 9
Dependent Claim
18 words
A process according to claim 1, 2 or 3 wherein said hydroxy-terminated diene polymer is a hydroxy-terminated polybutadiene.
Claim 10
Dependent Claim
65 words
A process for preparing urethane prepolymers resistant to the formation of multiple phases or layers upon storage which comprises reacting a hydroxy-terminated diene polymer having a molecular weight of about 700 to 12,000 and normally liquid, relatively non-volatile, aromatic polyisocyanate at a temperature above about 150° C. to form an isocyanate-terminated urethane prepolymer having an isocyanate group content of at least about 10 weight percent.
Claim 11
Dependent Claim
65 words
A process for preparing urethane prepolymers resistant to the formation of multiple phases or layers upon storage which comprises reacting a hydroxy-terminated diene polymer having a molecular weight of about 700 to 12,000 and normally liquid, relatively non-volatile, aromatic polyisocyanate at a temperature above about 150° C. to form an isocyanate-terminated urethane prepolymer having an isocyanate group content of at least about 10 weight percent.
Claim 12
Dependent Claim
14 words
A process according to claim 9 wherein said polyisocyanate is trihydrocarbyl phosphate-modified methylenebis (phenylisocyanate).
Claim 13
Dependent Claim
12 words
A process according to claim 9 wherein said polyisocyanate is polyarylene polyisocyanate.
Claim 14
Dependent Claim
19 words
A process according to claim 9, 10 or 11 wherein said temperature is about 160° C. to 180° C.
Claim 15
Dependent Claim
22 words
A process according to claim 9, 10 or 11 wherein said hydroxy-terminated diene polymer has a hydroxyl-functionality of about 2.1 to 2.6.
Claim 16
Dependent Claim
15 words
A process according to claim 13 wherein said hydroxy-terminated diene polymer is a hydroxy-terminated polybutadiene.
Claim 17
Dependent Claim
22 words
A process according to claim 13 wherein said hydroxy-terminated diene polymer has a majority of its unsaturation in the main hydrocarbon chain.
Claim 18
Dependent Claim
24 words
A process of claim 9, 10, 11, 14 or 15 wherein the molecular weight of said hydroxy-terminated diene polymer is about 1000 to 5000.
Claim 19
Dependent Claim
19 words
A process according to claim 16 wherein said hydroxy-terminated diene polymer has a hydroxyl-functionality of about 2.1 to 2.6.
Claim 20
Dependent Claim
16 words
A process according to claim 17 wherein said temperature is about 160° C. to 180° C.
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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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |