N-(2-hydroxyethyl)-ethyleneimines as catalysts for polyisocyanurate foam formation

Claim 2

A PROCESS FOR PRODUCING A CLOSED CELL RIGID ORGANIC POLYSIOCYANURATE FOAM BY REACTING AND FOAMING A REACTION MIXTURE COMPRISING AN ORGANIC POLYISOCYANATE, A CATALYTIC AMOUNT OF N-(2-HYDROXYETHYL)-ETHYLENE IMINE AND A BLOWING AGENT, SAID BLOWING AGENT CONSISTING OF A LOW BOILING ALAKNE OR A LOW BOILING HALOALKANE.

Claim 3

A process as claimed in claim 1 for producing a closed cell rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of an organic polyisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent, said blowing agent consisting of a low boiling alkane or a low boiling haloalkane and a minor amount of a polyol.

Claim 4

A process as claimed in claim 1 for producing a closed rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of an organic polyisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent, said blowing agent consisting of a low boiling alkane or a low boiling haloalkane and a minor amount of an epoxide.

Claim 5

A process as claimed in claim 1 for producing a closed cell rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of an organic polyisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent, said blowing agent consisting of a low boiling alkane or a low boiling haloalkane, a minor amount of polyol, said polyol being present in an amount below about 20 parts per 100 parts of the organic polyisocyanate, and an epoxide in an amount of from about 0.1 to about 20 mole percent based on the organic polyisocyanate.

Claim 6

A process as claimed in claim 1 for producing a closed cell rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of an organic polyisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent, said blowing agent consisting of a low boiling alkane or a low boiling haloalkane, a minor amount of polyol, said polyol being present in an amount below about 20 parts per 100 parts of the organic polyisocyanate, an epoxide in an amount of from about 0.1 to about 20 mole percent based on the organic polyisocyanate and, as an emulsifying agent, a polysiloxane-polyoxyalkylene block copolymer having from about 10 to 80 per cent by weight of siloxane polymer moiety and from 90 to 20 per cent by weight of alkylene oxide polymer moiety in the copolymer molecule.

Claim 7

A process as claimed in claim 1 for producing a closed cell rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of an organic polyisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent, said blowing agent consisting of a low boiling alkane or a low boiling haloalkane, a minor amount of polyol, said polyol being persent in an amount below about 20 parts per 100 parts of the organic polyisocyanate, an epoxide in an amount of from about 0.1 to about 20 mole percent based on the organic polyisocyanate, a polysiloxane-polyoxyalkylene block copolymer emulsifying agent having from about 10 to 80 percent by weight of siloxane polymer moiety and from 90 to 20 per cent by weight of alkylene oxide polymer moiety in the copolymer molecule and a catalytic amount of N,N,N'',N'' tetramethyl-1,3-butanediamine, N,N-dimethylethanolamine, bis ether, 1,4-diazabicyclo-octane, N,N'',N''''-tris(dimethylaminopropyl)-symhexahydrotriazine, 2-(N,N-dimethylaminomethyl)-phenol or 2,4, 6-tri(N,N-dimethylaminomethyl)-phenol.

Claim 8

A process as claimed in claim 1 wherein the organic polyisocyanate is a polymethylene polyphenylisocyanate and the blowing agent is fluorotrichloromethane.

Claim 9

A process for producing a rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture comprising an organic polyisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine and a blowing agent consisting of a low boiling alkane or a low boiling haloalkane.

Claim 10

A process for producing a rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture comprising an organic polyisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine and a blowing agent consisting of a low boiling alkane or a low boiling haloalkane.

Claim 11

A process for producing a rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of a polymethylene polyphenylisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent consisting of a low boiling haloalkane and a minor amount of an epoxide.

Claim 12

A process for producing a rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of a polymethylene polyphenylisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent consisting of a low boiling haloalkane and a minor amount of an epoxide.

Claim 13

A process for producing a rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of polymethylene polyphenylisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent consisting of fluorotrichloromethane, a minor amount of 3,4-epoxycyclohexyl 3,4-epoxycyclohexylacetate, and, as an emulsifying agent, a polysiloxane-polyoxyalkylene block copolymer.

Claim 14

A process for producing a rigid organic polyisocyanurate foam by reacting and foaming a reaction mixture consisting essentially of polymethylene polyphenylisocyanate, a catalytic amount of N-(2-hydroxyethyl)-ethylene imine, a blowing agent consisting of fluorotrichloromethane, a minor amount of 3,4-epoxycyclohexyl 3,4-epoxycyclohexylacetate, and, as an emulsifying agent, a polysiloxane-polyoxyalkylene block copolymer.