| 摘要 |
<p>1523913 Self-extinguishing fibres containing units of carboxyphosphinic acid derivative HOECHST AG 17 Oct 1975 [19 Oct 1974 (2)] 42699/75 Heading C3P Self-extinguishing filaments and fibres are made from a polymer comprising 35-85% by weight acrylonitrile 5-45% by weight of vinyl chloride, vinyl bromide and/or vinylidene chloride, 5-30% by weight of a carboxyphosphinic acid derivative of the formula in which R1 is alkyl having up to 8 carbon atoms or CH2Cl-, R2 is alkyl having up to 8 carbon atoms in which a H atom may be substituted by halogen when R1 is CH2Cl-, and R3 is H or Me, and 0-15% by weight of one or more other copolymerizable ethylenically unsaturated monomers, the weight percentages being based on the total amount of monomers. The fibres may be produced by dissolving the polymer in an aprotic solvent and spinning the resultant solution. The specific examples disclose the preparation of fibres from polymers comprising acrylonitrile, vinylidene chloride and as carboxyphosphinic acid derivative a compound of the formulae</p> |
