US4094827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted ureas as polyurethane catalysts
Assignee: Huntsman Corp
•
Filing: 1976-10-18
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Granted: 1978-06-13
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Expires: 1996-10-18
Abstract
Abstract Covers a method of producing a polyurethane by utilizing compounds of the structure below as catalysts in reacting an organic polyisocyanate with an organic polyester polyol or polyether polyol in the presence of said catalyst: ##STR1## where R is lower alkyl and X is hydrogen or CONR 1 R 2 where R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl and aryl with the proviso that both R 1 and R 2 may not be aryl.
Inventors
- 👤 Edward E. McEntire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1808; C08G18/1841
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
A method for producing a polyurethane which comprises reacting an organic polyisocyanate with an organic polyester polyol or polyether polyol in the presence of a catalytic amount of a compound having the following structural formula: ##STR3## where R is lower alkyl and X is hydrogen or CONR 1 R 2 where R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl and aryl with the proviso that both R 1 and R 2 may not be aryl.
Claim 2
Independent Claim
82 words
A method for producing a polyurethane which comprises reacting an organic polyisocyanate with an organic polyester polyol or polyether polyol in the presence of a catalytic amount of a compound having the following structural formula: ##STR3## where R is lower alkyl and X is hydrogen or CONR 1 R 2 where R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl and aryl with the proviso that both R 1 and R 2 may not be aryl.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein said organic polyisocyanate has a functionality of from 2 to 4, and said organic polyester or polyether polyol has a hydroxyl number of from about 25 to 700.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein R in said structural formula is methyl.
Claim 5
Dependent Claim
9 words
The method of claim 3 wherein X is hydrogen.
Claim 6
Dependent Claim
20 words
The method of claim 3 wherein X is CONR 1 R 2 and R 1 and R 2 are hydrogen.
Claim 7
Dependent Claim
22 words
The method of claim 3 where X is CONR 1 R 2 and R 1 is hydrogen and R 2 is methyl.
Claim 8
Dependent Claim
22 words
The method of claim 3 where X is CONR 1 R 2 and R 1 is hydrogen and R 2 is phenyl.
Claim 9
Dependent Claim
111 words
A method for producing a flexible polyether polyurethane foam according to claim 2 which comprises reacting in the presence of a blowing agent said organic polyisocyanate with a polyether polyol formed by the addition reaction of an alkyleneoxide of 2 to 4 carbon atoms to a polyhydric alcohol having a functionality of from 2 to about 4 in the presence of said catalyst, said organic polyisocyanate being employed in an amount sufficient to provide 0.4 to 1.5 mol equivalents of isocyanato groups per mol equivalent of hydroxyl groups, said polyether polyol having a molecular weight within the range of about 2000-7000, and a hydroxyl number of from about 25 to 60.
Claim 10
Dependent Claim
102 words
A method for producing a rigid polyether polyurethane foam according to claim 2 which comprises reacting in the presence of a blowing agent said organic polyisocyanate with a hydroxy terminated polyether in the presence of said catalyst, said polyisocyanate being employed in an amount sufficient to provide 0.4 to 1.5 mol equivalents of isocyanato groups per mol equivalent of a hydroxy group in the hydroxy terminated polyether, said polyether having from about 4 to about 7 hydroxy groups per molecule, a molecular weight within the range from 300 to about 1200 and a hydroxyl number within the range of 350 to 700.
Claim 11
Dependent Claim
104 words
A method for producing a flexible polyester polyurethane foam according to claim 2 which comprises reacting in the presence of a blowing agent toluene diisocyanate with a hydroxyl terminated condensation product of a polycarboxylic acid and a polyhydric alcohol in the presence of said catalyst, said toluene diisocyanate being employed in an amount sufficient to provide 1.0 to 1.5 mol equivalents of isocyanato groups per mol equivalent of hydroxyl groups, said condensation product having a functionality of from about 2 to about 4, and a molecular weight from about 2,000 to about 4,000, and a hydroxyl number ranging from about 20 to about 60.
Claim 12
Dependent Claim
6 words
A compound of the formula: ##STR4##
Claim 13
Dependent Claim
6 words
A compound of the formula: ##STR4##
References Cited (Backward Citations)
US3836488A
Cited
US4007140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |