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US4490302A
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Liquid diphenylmethane diisocyanate compositions
Assignee: Bayer Corp
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Filing: 1983-11-25
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Granted: 1984-12-25
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Expires: 2003-11-25
Abstract
Abstract The present invention is directed to a liquid, diphenylmethane diisocyanate composition having an isocyanate functionality of greater than 2.0 and having an isocyanate group content of from about 20 to about 30 percent by weight prepared by reacting: (a) diphenylmethane diisocyanate with (b) a mixture of (i) from about 5 to about 20 equivalent percent of a monohydroxy alcohol, (ii) from about 25 to about 35 equivalent percent of a poly-1,2-propylene ether glycol having a molecular weight of from 134 to 700, and (iii) from about 45 to about 65 equivalent percent of a trihydroxy alcohol selected from the group consisting of trimethylolpropane, triethylolpropane, glycerin and 1,3,6-hexane triol, the total equivalent percent of (i), (ii) and (iii) being 100, the weight ratio of (a) to (b) being from 5:1 to 15:1.
Inventors
- 👤 Eric C. Ma
- 👤 James N. Rieck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8035; C08G2120/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
A liquid, diphenylmethane diisocyanate composition having an isocyanate functionality of greater than 2.0 and having an isocyanate group content of from about 20 to about 30 percent by weight prepared by reacting: (a) diphenylmethane diisocyanate with (b) a mixture of (i) from about 5 to about 20 equivalent percent of a monohydroxy alcohol, (ii) from about 25 to about 35 equivalent percent of a poly-1,2-propylene ether glycol having a molecular weight of from 134 to 700, and (iii) from about 45 to about 65 equivalent percent of a trihydroxy alcohol selected from the group consisting of trimethylolpropane, triethylolpropane, glycerine and 1,3,6-hexane triol, the total equivalent percent of (i), (ii) and (iii) being 100 parts, the weight ratio of (a) to (b) being from 5:1 to 15:1.
Claim 2
Dependent Claim
126 words
A liquid, diphenylmethane diisocyanate composition having an isocyanate functionality of greater than 2.0 and having an isocyanate group content of from about 20 to about 30 percent by weight prepared by reacting: (a) diphenylmethane diisocyanate with (b) a mixture of (i) from about 5 to about 20 equivalent percent of a monohydroxy alcohol, (ii) from about 25 to about 35 equivalent percent of a poly-1,2-propylene ether glycol having a molecular weight of from 134 to 700, and (iii) from about 45 to about 65 equivalent percent of a trihydroxy alcohol selected from the group consisting of trimethylolpropane, triethylolpropane, glycerine and 1,3,6-hexane triol, the total equivalent percent of (i), (ii) and (iii) being 100 parts, the weight ratio of (a) to (b) being from 5:1 to 15:1.
Claim 3
Dependent Claim
13 words
The composition of claim 1 having an isocyanate functionality of less than 2.20.
Claim 4
Dependent Claim
20 words
The composition of claim 1 having an isocyanate group content of from about 20 to about 25 percent by weight.
Claim 5
Dependent Claim
20 words
The composition of claim 1, wherein the weight ratio of (a) to (b) is from about 6:1 to about 10:1.
Claim 6
Dependent Claim
18 words
The composition of claim 1, wherein said monohydroxy alcohol has a molecular weight of from 32 to 270.
Claim 7
Dependent Claim
26 words
The composition of claim 5, wherein said monohydroxy alcohol is selected from the group consisting of cinnamyl alcohol, 3-phenyl-1-propanol, 4-heptanol, propargyl alcohol, 2-hydroxyethyl methacrylate and tert-butanol.
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein said trihydroxy alcohol is trimethylol propane.
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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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |