| 摘要 |
1,155,289. Polymerizing vinyl chloride. UNION CARBIDE CORP. 21 Dec., 1966 [22 Dec., 1965], No. 57261/66. Heading C3P. Vinyl chloride is polymerized optionally with up to 25% of vinyl acetate in aqueous suspension in the presence of 0À0-0À4% by wt. of vinyl monomer of polyvinylpyrrolidone and 0À02-0À15% of 2,2<SP>1</SP>-azobisisobutyronitrile at 75-95‹ C. for at least 3 hours to obtain a glassy, spherical, non-porous polymer. The product may be moulded. |
