Azeotrope-like compositions of 1 1 1 3 3-pentafluoropropane and 1 1-dichloro-1-fluoroethane

A method of preparing polyurethane and polyisocyanurate foams comprising the step of reacting and foaming a mixture of ingredients which will rect to form the polyurethane or polyisocyanurate foams in the presence of a blowing agent an azeotrope-like composition consisting essentially of 1,1,1,3,3- pentafluoropropane in an amount from about 99 to about 50 weight percent and 1,1-dichloro-1-fluoroethane in an amount from about 1 to about 50 weight per cent.

A method of preparing polyurethane and polyisocyanurate foams comprising the step of reacting and foaming a mixture of ingredients which will react to form the polyurethane or polyisocyanurate foams in the presence of a blowing agent an azeotrope like composition consisting essentially of 1,1,1,3,3-pentafluoropropane in an amount from about 99 to about 70 weight percent and 1,1-dichloro-1-fluoroethane in an amount of from about 1 to about 30 weight percent.

A method for producing foam comprising blending a heat plasticized resin with volatile blowing agent.

A method for producing foam comprising blending a heat plasticized resin with a volatile blowing agent an azeotrope-like composition consisting essentially of 1,1,1,3,3-pentafluoropropane in an amount 99 to about 50 weight percent and 1,1-dichloro-1-fluoroethane in an amount from about 1 to about 50 weight per cent.

A method for producing foam comprising blending a heat plasticized resin with a volatile blowing agent an azeotrope like composition consisting essentially of 1,1,1,3,3-pentafluoropropane in an amount from about 99 to about 70 weight percent and 1,1-dichloro-1-fluoroethane in an amount of from about 1 to about 30 weight percent.