| 摘要 |
Impact-resistant polyvinyl chloride is prepared by polymerizing vinyl chloride in the presence of an aqueous emulsion of polytridecyl acrylate, which emulsion has a solids content of 20 to 50% by weight and is added to the polymerization batch in amount of 1 to 15% by weight of the polymerization product. The product is said to be a mixture of polyvinyl chloride with a graft polymer of vinyl chloride on polytridecyl acrylate. Polymerization may be effected in the presence of conventional catalysts and redox initiators and emulsion and suspension stabilizers. Examples describe the polymerization of vinyl chloride in the presence of aqueous emulsions of polytridecyl acrylate and (1) benzoyl peroxide and gelatin, and (2) potassium persulphate, sodium pyrosulphate and a sodium C12-14 alkyl sulphonate. The products are compounded with glycerin monooleate, wax, stearic acid and organotin stabilizers. |
