Use of low molecular weight polyhydroxy compounds in...

Details Use of low molecular weight polyhydroxy compounds in... Use of low molecular weight polyhydroxy compounds in...

C - Chemistry, Metallurgy

08

G

403/14, 403/47

C08G 18/32 (2006.01) C08G 18/16 (2006.01) C08G 18/65 (2006.01) C08J 9/14 (2006.01) C08L 75/04 (2006.01)

Patent

CA 1139049

ABSTRACT OF THE DISCLOSURE The use of methylene chloride as a blowing agent for resinous foams, particularly urethane foams is improved by incorporating a low molecular weight poly- hydroxy aliphatic compound having more than two hydroxyl groups. Simultaneously with the addition, the amount of gelling catalyst (e.g., stannous octoate) required to obtain very soft foams, is reduced over that required using the methylene chloride without the polyhydroxy com- pound. When the polyhydroxy compound is used, smaller amounts of the gelling catalyst are employed for equal foam properties when the fluorinated halocarbons are employed either alone or in combination with the methyl- ene chloride.

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