Fire resistant plastic materials for film for high elongation

摘要

Plastic materials with a melt flow index 230/2.16 of 0.1-100 g/10 minutes contain: (a1) propylene homopolymer with a melt flow index 230/2.16 of 0.1-100 g/10 minutes, or(a2) statistical copolymer of propylene and 2-10C alkene-1 with a comonomer content of less than 15 wt.%, or (a3) a mixt. of 25-97 wt.% of a copolymer of propylene and 0.1-15 wt.% 2-10C alkene-1 and 3-75 wt.% of another propylene copolymer contg. 15-80 wt.% 2-10C alkene-1 units, or(a4) a mixt. of 25-97 wt.% propylene homopolymer and 3-75 wt.% propylene/2-10C alkene-1 copolymer, with a comonomer content of 15-80 wt.% w.r.t. the second polymer, (b) a propylene or ethylene polymer grafted with 0.1-5 wt.% alpha , beta -unsatd. carboxylic acid or acid deriv., with a melt flow index 230/2.16 of 0.01-400 g/10 minutes, and (c) a nitrogen cpd. of formula (I): R<1>=H, 1-30C alkyl, 2-30C alkyl or alk-1-enyl substd. with O atom(s) and/or amino gps., or a gp. of formula (II):HO-(CHR<2>-CHR<2>)m- (II)R<2>=H, 1-4C alkyl or amino; andm=1-100. Also claimed are: (i) a process for the prodn. of the materials, by reacting components (a)-(c) together at 180-280 deg C and 1-100 bar for a mean residence time of 0.2-10 minutes; and(ii) film, fibres and mouldings made from the materials.