Polyurethane catalysts from sulfur based salts

A process for producing polyurethane consisting of contacting at least one polyester polyol and at least one isocyanate while in the presence of A) a gelling catalyst consisting of at least one sulfite and at least one blowing catalyst selected from the group consisting of 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol, N,N,N′-trimethyl-N′-3-aminopropyl-bis(aminoethyl) ether, bis(dimethylaminoethyl)ether, pentamethyldiethylene triamine, and hexamethyltriethylenetetraamine, and B) at least one optional component selected from the group consisting of at least one cell stabilizer, at least one blowing agent, at least one crosslinking agent, at least one chain extender, at least one pigment, at least one filler, at least one flame retardant, at least one auxiliary urethane gelling catalyst, at least one auxiliary urethane blowing catalyst, at least one transition metal catalyst, at least one alkali carboxylate salt, at least one alkali earth carboxylate salt, or any combination thereof;

• wherein the sulfite has a structural formula of at least one of:
• i) M2SO3 where M is an alkali metal selected from the group of Na, K, Li, Cs, ii) MSO3 where M is an alkali earth metal selected from the group of Ca, Mg, Sr, Ba;
• and iii) M2SO3 where M is a quaternary ammonium ion of general formula R1R2R3R4N where R1, R2, R3, R4 are C1-C18 alkyl, alkenyl, aryl, alkylaryl, substituted alkyl, alkenyl or alkylaryl linear, branched with or without heterocyclic containing groups, and wherein the amount of the at least one sulfite is about 0.1 to about 20 parts by weight per hundred parts by weight of the at least one polyol.

A process for producing polyurethane consisting of contacting at least one polyester polyol and at least one isocyanate while in the presence of A) a catalyst composition consisting of i) a gelling catalyst consisting of at least one sulfite and ii) at least one tetralkylammonium phase transfer catalyst selected from the group consisting of carboxylates, sulfonates, halide ions, and sulfates of tetramethylammonium, tetraethylammonium, tetrapropylammonium, tetrabutylammonium, benzyltrimethylammonium, dibenzyldimethylammonium, tribenzylmethylammonium, tetrabenzylammonium, phenyltrimethylammonium, diphenyldimethylammonium, triphenylmethylammonium, tetraphenylammonium, dialkylimidazolium, and N-methyl-triethylenediammonium, and B) at least one optional component selected from the group consisting of at least one cell stabilizer, at least one blowing agent, at least one crosslinking agent, at least one chain extender, at least one pigment, at least one filler, at least one flame retardant, at least one auxiliary urethane gelling catalyst, at least one auxiliary urethane blowing catalyst, at least one transition metal catalyst, at least one alkali carboxylate salt, at least one alkali earth carboxylate salt, or any combination thereof;

• wherein the sulfite has a structural formula of at least one of:
• i) M2SO3 where M is an alkali metal selected from the group of Na, K, Li, Cs, ii) M2SO3 where M is an alkali earth metal selected from the group of Ca, Mg, Sr, Ba;
• and iii) M2SO3 where M is a quaternary ammonium ion of general formula R1R2R3R4N where R1, R2, R3, R4 are C1-C18 alkyl, alkenyl, aryl, alkylaryl, substituted alkyl, alkenyl or alkylaryl linear, branched with or without heterocyclic containing groups, and wherein the amount of the at least one sulfite is about 0.1 to about 20 parts by weight per hundred parts by weight of the at least one polyol.

A process for producing polyurethane consisting of contacting at least one polyester polyol and at least one isocyanate while in the presence of A) a catalyst composition consisting of i) a gelling catalyst consisting of at least one sulfite, ii) at least one blowing catalyst, and iii) at least one tetralkylammonium phase transfer catalyst, and B) at least one optional component selected from the group consisting of at least one cell stabilizer, at least one blowing agent, at least one crosslinking agent, at least one chain extender, at least one pigment, at least one filler, at least one flame retardant, at least one auxiliary urethane gelling catalyst, at least one auxiliary urethane blowing catalyst, at least one transition metal catalyst, at least one alkali carboxylate salt, at least one alkali earth carboxylate salt, or any combination thereof;

• wherein the sulfite has a structural formula of at least one of:
• i) M2SO3 where M is an alkali metal selected from the group of Na, K, Li, Cs, ii) M2SO3 where M is an alkali earth metal selected from the group of Ca, Mg, Sr, Ba;
• and iii) M2SO3 where M is a quaternary ammonium ion of general formula R1R2R3R4N where R1, R2, R3, R4 are C1-C18 alkyl, alkenyl, aryl, alkylaryl, substituted alkyl, alkenyl or alkylaryl linear, branched with or without heterocyclic containing groups;
• wherein the at least one blowing catalyst is selected from the group consisting of 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol, N,N,N′-trimethyl-N′-3-aminopropyl-bis(aminoethyl) ether, bis(dimethylaminoethyl)ether, pentamethyldiethylene triamine, and hexamethyltriethylenetetraamine;
• wherein the at least one tetralkylammonium phase transfer catalyst is selected from the group consisting of carboxylates, sulfonates, halide ions, and sulfates of tetramethylammonium, tetraethylammonium, tetrapropylammonium, tetrabutylammonium, benzyltrimethylammonium, dibenzyldimethylammonium, tribenzylmethylammonium, tetrabenzylammonium, phenyltrimethylammonium, diphenyldimethylammonium, triphenylmethylammonium, tetraphenylammonium, dialkylimidazolium, and N-methyl-triethylenediammonium;
• and wherein the amount of the at least one sulfite is about 0.1 to about 20 parts by weight per hundred parts by weight of the at least one polyol.