| 摘要 |
<p>1380961 Azodicarbonamide/sulphinic acid or salt as blowing agents BAYER AG 18 Jan 1972 [18 Jan 1971] 2281/72 Headings C3C and C3R Cellular natural or synthetic rubber or synthetic resins are made using as blowing agent azodicarbonamide together with an activator which is an aromatic sulphinic acid or salt of Formula (I) where M is H, a metal or an ammonium radical which may be substituted, n is the valency of M, and R 1-5 are H, C 1-4 alkyl or halogen. The polymer may be derived from butadiene, chlorobutadiene, dimethylbutadiene, isoprene, styrene,α-methylstyrene, acrylonitrile, methacylonitrile, acrylates, methacrylates, ethylene, propylene, vinyl chloride, and/or vinyl acetate; or may be a polyurethane. The activator may be a benzene sulphinate or sodium, zinc, lead cadmium, magnesium; a p-chlorobenzene sulphinate of zinc or sodium; a toluene sulphinate of cadmium or sodium; or p-chlorobenzene sulphinic acid.</p> |
