C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
403/30
C08L 75/04 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08J 9/00 (2006.01) C08J 9/30 (2006.01) C08L 83/04 (2006.01) D06N 3/14 (2006.01) D06N 7/00 (2006.01)
Patent
CA 1161995
ABSTRACT OF THE DISCLOSURE This invention is directed to a polyurethane foam composition which is suitable as a hacking for a substrate and to a substrate containing the poly- urethane foam composition. The foam composition is the reaction product of a frothed polyurethane forming mixture comprising a relatively high molecular weight polyether polyol, a relatively low molecular weight polyol, an organic polyisocyanate or polyisothio- cyanate, an inorganic filler, a catalyst for urethane formation, and a silicone surfactant. The silicone surfactant is a poly(dimethylsiloxane) polyoxyalkylene branch copolymer having an average molecular weight of less than 30,000 wherein at least 60 percent by weight of the polyoxyalkylene groups are oxyethylene groups, the dimethylsiloxane content of the copolymer being from 15 to 40 percent by weight, at least 40 percent of the weight of the copolymer is derived from the oxy- ethylene groups. The silicone surfactant is present in the mixture in a quantity from 0.02 to less than 0.5 parts by weight per 100 parts by weight of the combined weights of the relatively high molecular weight poly- ether polyol and the relatively low molecular weight polyol. 29,141C-F
386813
Jenkines Randall C.
Porter James R.
Smart & Biggar
The Dow Chemical Company
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