| 摘要 |
1,154,055. Filled polyurethanes. ALLIED CHEMICAL CORP. 29 Aug., 1967 [29 Aug., 1966], No. 39517/67. Heading C3R. A composition which produces a filled, non- cellular polyurethane when mixed with an organic polyisocyanate comprises an organic polyol, an inert filler, an organo-mercuric salt catalyst which is free from ionizable halogen, and red lead oxide to stabilize the catalyst. The amount of red lead oxide is generally from 0À5 to 2% by weight of the polyol, but it may also be employed as the filler in amount up to 150%. Specified catalysts are phenyl mercuric acetate, propionate, oleate, nitrate, butyrate and pchlorobenzoate, o, m and pchlorobromo- and fluoro-phenyl mercuric acetates, chloromethyl mercuric chloroacetate, methyl mercuric decanoate, phenyl mercuric phenoxide, methyl mercuric benzoate, 2-acetoxy mercuric pyridine, p-tolyl mercuric acetate and p-methoxy phenyl mercuric acetate. The polyol may be the conventional simple polyol or polyether or polyester polyol. The polyisocyanate may be aliphatic, cycloaliphatic or aromatic and may be a prepolymer. Suitable fillers are attapulgite, kaolin, talc, bentonite, halloysite, aluminium silicate, calcium silicate, magnesium trisilicate, zinc sulphide, barium sulphate, calcium fluoride, titanium dioxide and amorphous silica.
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