US4576731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of incompatible mixed polyols to polyol products with increased resistance to phase separation
Assignee: Bayer Corp
•
Filing: 1983-01-17
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Granted: 1986-03-18
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Expires: 2003-01-17
Abstract
Abstract The present invention is directed to a polyol mixture comprising the reaction product of at least two polyols which normally are incompatible with each other and an organic isocyanate, the isocyanate to hydroxyl equivalent ratio being from 1:4 to 1:35.
Inventors
- 👤 James N. Rieck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6511; C08G18/08; C08G18/10; C08G18/12; C08G2130/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
40 words
A polyol mixture comprising the reaction product of at least two polyols which normally are incompatible with each other and an organic isocyanate, the isocyanate to hydroxyl equivalent ratio being from 1:4 to 1:35, wherein the mixture is a liquid.
Claim 2
Dependent Claim
40 words
A polyol mixture comprising the reaction product of at least two polyols which normally are incompatible with each other and an organic isocyanate, the isocyanate to hydroxyl equivalent ratio being from 1:4 to 1:35, wherein the mixture is a liquid.
Claim 3
Dependent Claim
26 words
The polyol mixture of claim 1 wherein the incompatible polyols comprise at least one high molecular weight polyol and at least one low molecular weight polyol.
Claim 4
Dependent Claim
20 words
The polyol mixture of claim 2 wherein the isocyanate to hydroxyl equivalent ratio is from about 1:6 to about 1:25.
Claim 5
Independent Claim
39 words
A method for converting a mixture of incompatible polyols into a liquid composition more resistant to phase separation comprising reacting said mixture of polyols with an isocyanate at an isocyanate to hydroxyl equivalent ratio of from 1:4 to 1:35.
Claim 6
Independent Claim
39 words
A method for converting a mixture of incompatible polyols into a liquid composition more resistant to phase separation comprising reacting said mixture of polyols with an isocyanate at an isocyanate to hydroxyl equivalent ratio of from 1:4 to 1:35.
Claim 7
Dependent Claim
18 words
The method of claim 4 wherein the mixture of polyols contains a major portion of hydroxyl terminated polyesters.
Claim 8
Dependent Claim
17 words
The method of claim 5 wherein the mixture of polyols contains a minor portion of ethylene glycol.
Claim 9
Dependent Claim
17 words
The method of claim 5 wherein the mixture of polyols contains a minor portion of 1,4-butane diol.
Claim 10
Dependent Claim
20 words
The method of claim 5 wherein the mixture of polyols is reacted with one or more isomers of tolylene diisocyanate.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |