| 摘要 |
Compositions comprising a vinyl or vinylidene halide homopolymers, asbestos and optionally a non-fibrous inorganic filler are stabilized with a stabilizer containing by weight 1 to 10 parts of dicyandiamide and 1 to 7 parts of pentaerythritol and/or dipentaerythritol. Specified polymers are polyvinyl chloride, bromide and fluoride and polyvinylidene chloride and bromide. Specified non-fibrous fillers are calcium carbonate, sulphate and silicate, barium carbonate and sulphate, magnesium silicate, china clay, kaolin, fuller's earth, titanium dioxide, lead chromate and iron oxide. The compositions may also comprise plasticizers, e.g. di-2-ethylhexyl phthalate, dibutyl sebacate, dioctyl sebacate and tricresyl phosphate; and known stabilizers, e.g. barium, cadmium and zinc carboxylates and phenates, organic phosphites and epoxidized oils. The compositions may be made into floor coverings. Examples describe compositions comprising polyvinyl chloride, asbestos, ground limestone, di-2-ethylhexyl phthalate, epoxidized soya bean oil, titanium dioxide, dicyandiamide and pentaerythritol or dipentaerythritol. |
