Urethane foam catalyst and process for preparing urethane foam

Claim 2

The process of making a cellular polyurethane as claimed in claim 1 wherein said nitrogen-containing organic compound is an amidoxime of the formula wherein R is a monovalent hydrocarbon radical having three to eighteen carbon atoms.

Claim 3

The process of making a cellular polyurethane as claimed in claim 1 wherein said nitrogen-containing organic compound is an amidoxime of the formula wherein R is a monovalent hydrocarbon radical having three to 18 carbon atoms and R'' is a divalent hydrocarbon radical having one to three carbon atoms, such that the total number of carbon atoms in said structure does not exceed 21.

Claim 4

The process of making a cellular polyurethane as claimed in claim 1 wherein said nitrogen-containing organic compound is a hydroxamic acid of the formula wherein R is a monovalent hydrocarbon radical having three to 18 carbon atoms and R'' is a divalent hydrocarbon radical having one to three carbon atoms such that the total number of carbon atoms in said structure does not exceed 21.

Claim 5

The process of making a cellular polyurethane as claimed in claim 1 wherein said antimony compound is antimony tritallate.

Claim 6

The process of making a cellular polyurethane which comprises reacting 100 parts, by weight, of a substance having active hydrogen atoms as determined by the Zerewitinoff method, 5-300 parts, by weight of an organic polyfunctional isocyanate, 0.5-10 parts, by weight, of water, 0.005-4.2 parts, by weight, of stannous octoate gel catalyst, and as a blowing catalyst combination 0.005 to 4.95 parts, by weight, of a mixture of 40 percent to 60 percent, by weight, of an antimony carboxylate and 60 percent to 40 percent, by weight, of a sodium or potassium salt of a nitrogen-containing organic compound selected from the group consisting of primary, secondary and tertiary amino-substituted carboxylic acids, aromatic amino-substituted carboxylic acids, monoamino-mono-carboxylic acids, monoamino-dicarboxylic acids, diamino-mono-carboxylic acids, heterocyclic aminoacids, amidoximes, and hydroxamic acids, said gel catalyst and blowing catalyst combination being present in the weight ratio of 0.01 parts to 5 parts of the former per part of the latter.

Claim 7

process of making cellular polyurethane which comprises reacting a substance having active hydrogen atoms as determined by the Zerewitinoff method, an organic polyfunctional isocyanate, and water, said reaction being carried out in the presence of 0.005 to 4.2 parts, by weight, of a gel catalyst selected from the group consisting of Sn(OCOR)2 and R''aSNXb wherein R and R'' are independently selected from the group consisting of alkyl, alkenyl, aryl, aralkyl, alkaryl and cycloalkyl, a and b are integers the sum of which is 4 and X is selected from the group consisting of chlorides and the negative residual portions of organic carboxylic acids, mercaptides, alcohols, esters of mercaptoacids, and as a blowing catalyst combination 0.005-4.95 parts, by weight, of a mixture of 40 percent to 60 percent, by weight, of an antimony carboxylate and 60 percent to 40 percent, by weight, of a sodium or potassium salt of a nitrogen-containing organic compound selected from the group consisting of primary, secondary, and tertiary amino-substituted carboxylic acids, aromatic amino-substituted carboxylic acids, monoamino-mono-carboxylic acids, monoamino-dicarboxylic acids, diamino-mono-carboxylic acids, heterocyclic aminoacids, amidoximes, and hydroxamic acids, said gel catalyst and blowing catalyst combination being present in the weight ratio of 0.01 parts to 5 parts of the former per part of the latter.

Claim 8

A novel composition suitable for use as a blowing and gel catalyst in the production of polyurethane foams by the reaction of an organic compound having reactive hydrogen atoms as determined by the Zerewitinoff method, water, and a polyfunctional isocyanate comprising a gel catalyst selected from the group consisting of Sn(OCOR)2 and R''aSnXb wherein R and R'' are independently selected from the group consisting of alkyl, alkenyl, aryl, aralkyl, alkaryl, and cycloalkyl, a and b are integers the sum of which is 4 and X is selected from the group consisting of chlorides and the negative residual portions of organic carboxylic acids, mercaptides, alcohols, esters of mercaptoacids, and as a blowing catalyst combination 40 percent to 60 percent, by weight, of an antimony carboxylate and 60 percent to 40 percent, by weight, of a sodium or potassium salt of a nitrogen-containing organic compound selected from the group consisting of primary, secondary, and tertiary amino-substituted carboxylic acids, aromatic amino-substituted carboxylic acids, monoamino-mono-carboxylic acids, monoamino-dicarboxylic acids, diamino-mono-carboxylic acids, heterocyclic aminoacids, amidoximes, and hydroamic acids, said gel catalyst and blowing catalyst combination being present in the ratio of 0.01 parts to 5 parts of the former per part of the latter.

Claim 9

The novel composition of claim 9 wherein said gel catalyst is stannous 2ethylhexanoate and said antimony carboxylate is antimony tritallAte.

Claim 10

A novel catalytic composition suitable for use as a blowing and gel catalyst in the production of polyurethane foams by the reaction of a substance having active hydrogen atoms as determined by the Zerewitinoff method, and organic polyfunctional isocyanate and water, which comprises a stannous octoate gel catalyst and as a blowing catalyst combination 40 percent to 60 percent, by weight, of an antimony carboxylate and 60 percent to 40 percent, by weight, of a sodium or potassium salt of a nitrogen-containing organic compound selected from the group consisting of primary, secondary, and tertiary amino-substituted carboxylic acids, aromatic amino-substituted carboxylic acids, monoamino-mono-carboxylic acids, monoamino-dicarboxylic acids, diamino-mono-carboxylic acids, heterocyclic aminoacids, amidoximes, and hydroxamic acids, said gel catalyst and blowing catalyst combination being present in the ratio of 0.01 to 5 parts of the former per part of the latter.