Process for producing cellular plastics by the...

Details Process for producing cellular plastics by the... Process for producing cellular plastics by the...

C - Chemistry, Metallurgy

08

J

403/37, 48/47

C08J 9/14 (2006.01) C08J 9/00 (2006.01) C08J 9/12 (2006.01) C08L 75/00 (2006.01)

Patent

CA 1328560

PROCESS FOR PRODUCING CELLULAR PLASTICS BY THE POLYISOCYANATE POLYADDITION METHOD BY MEANS OF STABLE EMULSIONS CONTAINING BLOWING AGENTS, AND SUCH EMULSIONS Abstract of the Disclosure This invention concerns a process for producing cellular plastics by the polyisocyanate polyaddition process by reaction of a) organic and/or modified organic polyiso- cyanates with b) at least one high molecular compound with at least two reactive hydrogens and optionally c) low molecular chain extenders and/or cross- linking agents in the presence of d) blowing agents e) catalysts f) additives and/or processing aids where low boiling fluorinated or perfluorinated hydrocarbons with 3 to 8 carbons that are insoluble or almost insoluble in (a) to (c), sulfur hexafluoride or mixtures thereof are used as blowing agent (d) which is emulsified in reaction components (a), (b), mixtures of (b) and (c) or (a) and (b) -71- as well as stable blowing agent emulsions of the aforementioned blowing agents (d) and reaction components (a), (b) or (b) and (c). -72-

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