Patent US2814015A successfully refreshed from Google Patents.
US4421871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene oxide adducts of toluenediamine
Assignee: BASF Corp
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Filing: 1983-02-22
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Granted: 1983-12-20
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Expires: 2003-02-22
Abstract
Abstract The subject invention relates to polyol compositions comprising the reaction product prepared by reacting from 4 to 9 moles of propylene oxide per mole of toluenediamine by weight at temperatures greater than 140° C. in the presence of at least 0.6 parts of alkali metal hydroxide per 100 parts by weight of toluenediamine, with the proviso that at least 0.8 part by weight of alkali metal hydroxide is used if the toluenediamine is 2,4-toluenediamine, or 2,6-toluenediamine, or mixtures thereof.
Inventors
- 👤 Alexander Korczak
- 👤 William W. Levis, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:24
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C08G65/2627; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08L; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
A process for preparing a polyurethane foam comprising reacting, in the presence of a blowing agent and catalyst, an organic polyisocyanate with a polyol composition comprising the reaction product prepared by reacting from 4 to 9 moles of propylene oxide per mole of toluenediamine at temperatures greater than 140° C. in the presence of at least 0.6 part of alkali metal hydroxide per 100 parts of toluenediamine with the proviso that at least 0.8 part of alkali metal hydroxide is used if the toluenediamine is 2,4-toluenediamine or 2,6-toluenediamine, or mixtures thereof.
Claim 2
Dependent Claim
91 words
A process for preparing a polyurethane foam comprising reacting, in the presence of a blowing agent and catalyst, an organic polyisocyanate with a polyol composition comprising the reaction product prepared by reacting from 4 to 9 moles of propylene oxide per mole of toluenediamine at temperatures greater than 140° C. in the presence of at least 0.6 part of alkali metal hydroxide per 100 parts of toluenediamine with the proviso that at least 0.8 part of alkali metal hydroxide is used if the toluenediamine is 2,4-toluenediamine or 2,6-toluenediamine, or mixtures thereof.
Claim 3
Dependent Claim
41 words
The process of claim 1 wherein the toluenediamine used to prepare the polyol is a mixture containing about 90 percent by weight of an approximately 1:1 weight ratio of 2,3-toluenediamine and 3,4-toluenediamine and 10 percent by weight of 2,4- and 2,6-toluenediamine.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein potassium hydroxide is used as the alkali metal hydroxide to prepare the polyol.
Claim 5
Dependent Claim
18 words
The process of claim 3 wherein temperatures of at least 150° C. are used to prepare the polyol.
Claim 6
Dependent Claim
27 words
The process of claim 4 wherein from 0.6 part to 1.0 part of alkali metal hydroxide per 100 parts of toluenediamine is used to prepare the polyol.
Claim 7
Dependent Claim
56 words
The process of claim 1 wherein a polyoxyalkylene polyether polyol having an equivalent weight of from 50 to 300 and an average functionality of 2 to 6 is blended with the polyol composition of claim 1 such that the weight ratio of polyoxyalkylene polyether polyol to polyol composition of claim 1 is from 9:1 to 1:9.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein the organic polyisocyanate is selected from the group consisting of toluene disocyanate and crude diphenylmethane diisocyanate.
Claim 9
Dependent Claim
22 words
The process of claim 5 wherein the organic polyisocyanate is selected from the group consisting of toluene disocyanate and crude diphenylmethane diisocyanate.
Claim 10
Dependent Claim
22 words
The process of claim 6 wherein the organic polyisocyanate is selected from the group consisting of toluene disocyanate and crude diphenylmethane diisocyanate.
Claim 11
Dependent Claim
9 words
A polyurethane foam prepared in accordance with claim 1.
Claim 12
Dependent Claim
9 words
A polyurethane foam prepared in accordance with claim 5.
Claim 13
Dependent Claim
9 words
A polyurethane foam prepared in accordance with claim 6.
Claim 14
Dependent Claim
9 words
A polyurethane foam prepared in accordance with claim 7.
Claim 15
Dependent Claim
9 words
A polyurethane foam prepared in accordance with claim 8.
Claim 16
Dependent Claim
9 words
A polyurethane foam prepared in accordance with claim 9.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |