Process for the manufacture of foams with the aid of blowing...

Details Process for the manufacture of foams with the aid of blowing... Process for the manufacture of foams with the aid of blowing...

C - Chemistry, Metallurgy

08

G

403/37

C08G 18/08 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2037587

HOE 90/F 074 Abstract of the Disclosure Process for the manufacture of foams with the aid of blowing agents containing fluoroalkanes and fluorinated ethers, and foams obtainable by this process The invention relates to a process for the manufacture of foams based on polyisocyanates by the reaction of polyisocyanates, compounds containing at least two hydrogen atoms reactive towards isocyanate groups, blowing agents and, if appropriate, other additives. The blowing agents used consist to the extent of at least 10 mol% of at least one fluoroalkane of formula (I), CaHbFo, where a = 2-6, b = 1-12 and c = 2-13, and at least one fluorinated ether of formula (II), CaHbFcO-CdHeFf, where a = 1-6, b = 1-12, c = 1-12, d = 1-2, e = 0-5 and f = 0-5. The invention further relates to the foams obtainable by this process.

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