US3933692A
Expired / Lapsed
US
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Urethane foam catalyst
Assignee: M&T Chemicals Inc
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Filing: 1974-03-14
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Granted: 1976-01-20
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Expires: 1994-03-14
Abstract
Abstract This invention is a process for making a cellular polyurethane comprising reacting a polyalkylene polyol having reactive hydrogen atoms as determined by the Zerewitinoff method exhibiting a molecular weight of at least 500, an organic polyisocyanate, and water in the presence of a gel catalyst and a foaming catalyst comprising at least one compound selected from those of the formulae: ##SPC1## Wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
Inventors
- 👤 Bernard G. Kushlefsky
- 👤 Kenneth Treadwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:05
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3863; C08G18/3865; C08G18/3868; C08G18/08; C08G18/16; C08G18/161
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
78 words
The process of making a cellular polyurethane which comprises reacting a polyalkylene polyol having reactive hydrogen atoms as determined by the Zerewitinoff method, an organic poly-functional isocyanate, water, and a gel catalyst, said reaction being carried out in the presence of a gel catalyst and a blowing catalyst comprising at least one compound selected from those of the formulae: ##SPC6## wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
Claim 2
Dependent Claim
78 words
The process of making a cellular polyurethane which comprises reacting a polyalkylene polyol having reactive hydrogen atoms as determined by the Zerewitinoff method, an organic poly-functional isocyanate, water, and a gel catalyst, said reaction being carried out in the presence of a gel catalyst and a blowing catalyst comprising at least one compound selected from those of the formulae: ##SPC6## wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
Claim 3
Dependent Claim
17 words
The process of making a cellular polyurethane as claimed in claim 1 wherein said R' is hydrogen.
Claim 4
Dependent Claim
17 words
The process of making a cellular polyurethane as claimed in claim 2 wherein said R is alkyl.
Claim 5
Dependent Claim
20 words
The process of making a cellular polyurethane as claimed in claim 1 wherein at least one blowing catalyst is bis(o-aminophenylthio)methane.
Claim 6
Dependent Claim
20 words
The process of making a cellular polyurethane as claimed in claim 1 wherein at least one blowing catalyst is bis(o-aminophenylthio)ethane.
Claim 7
Dependent Claim
21 words
The process of making a cellular polyurethane as claimed in claim 1 wherein at least one blowing catalyst is bis(o-aminophenylthio)-1,2 propane.
Claim 8
Dependent Claim
55 words
The process of making a cellular polyurethane as claimed in claim 1 wherein said blowing catalyst is a combination of at least one tertiary amine and at least one compound selected from those of the formulae: ##SPC7## wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
Claim 9
Dependent Claim
19 words
The process of making a cellular polyurethane as claimed in claim 7 wherein said tertiary amine is N-ethyl morpholine.
Claim 10
Dependent Claim
73 words
The process of making a cellular polyurethane as claimed in claim 1 wherein the gel catalyst is a compound selected from the group consising of Sn(OCOR) 2 and R' a SnX b wherein R and R' are hydrocarbon radicals and X is selected from the group consisting of chloride and negative residual portions of organic carboxylic acids, mercaptides, alcohols, and esters of mercaptoacids, a and b being 1-3, a plus b being 4.
Claim 11
Dependent Claim
14 words
The process of claim 1 wherein said catalytic amount is 0.001-5% of the polyol.
Claim 12
Dependent Claim
87 words
The process of making a cellular polyurethane which comprises reacting 100 parts of a substance having active hydrogen atoms as determined by the Zerewitinoff method, 5-300 parts of an organic poly-functional isocyanate, 0.5-10 parts of water, 0.005-4.2 parts of gel catalyst, and as a blowing catalyst combination 0.005 to 4.95 parts of a mixture of at least one tertiary amine and at least one compound exhibiting the formula: ##SPC8## wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
Claim 13
Dependent Claim
87 words
The process of making a cellular polyurethane which comprises reacting 100 parts of a substance having active hydrogen atoms as determined by the Zerewitinoff method, 5-300 parts of an organic poly-functional isocyanate, 0.5-10 parts of water, 0.005-4.2 parts of gel catalyst, and as a blowing catalyst combination 0.005 to 4.95 parts of a mixture of at least one tertiary amine and at least one compound exhibiting the formula: ##SPC8## wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
Claim 14
Dependent Claim
73 words
The process of making a cellular polyurethane which comprises reacting 100 parts of a substance having active hydrogen atoms as determined by the Zerewitinoff method, 5-300 parts of an organic poly-functional isocyanate, 0.5-10 parts of water, 0.005-4.2 parts of gel catalyst, and as a blowing catalyst combination 0.005 to 4.95 parts of a mixture of a tertiary amine and a compound of the formula: ##SPC9## where R is alkyl and R' is hydrogen.
Claim 15
Dependent Claim
73 words
The process of making a cellular polyurethane which comprises reacting 100 parts of a substance having active hydrogen atoms as determined by the Zerewitinoff method, 5-300 parts of an organic poly-functional isocyanate, 0.5-10 parts of water, 0.005-4.2 parts of gel catalyst, and as a blowing catalyst combination 0.005 to 4.95 parts of a mixture of a tertiary amine and a compound of the formula: ##SPC9## where R is alkyl and R' is hydrogen.
Claim 16
Dependent Claim
69 words
The process of making a cellular polyurethane which comprises reacting a substance having active hydrogen atoms as determined by the Zerewitinoff method, an organic poly-functional isocyanate, water, a gel catalyst, and as a blowing catalyst 0.005-4.95 parts of a mixture of 40% of at least one compound exhibiting the formula: ##SPC10## wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
Claim 17
Dependent Claim
69 words
The process of making a cellular polyurethane which comprises reacting a substance having active hydrogen atoms as determined by the Zerewitinoff method, an organic poly-functional isocyanate, water, a gel catalyst, and as a blowing catalyst 0.005-4.95 parts of a mixture of 40% of at least one compound exhibiting the formula: ##SPC10## wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |