| 摘要 |
1489826 Removing acrylonitrile monomer LABOFINA SA 22 Oct 1975 [24 Oct 1974] 43378/75 Headings C3P and C3G Residual acrylonitrile monomer is removed from copolymers or graft copolymers of styrene and acrylonitrile (e.g. SAN and ABS resins) by washing with an aqueous solution of an alkali metal sulphide or disulphide. |
