A halogenated product of a low-molecular weight ethylene random copolymer comprising ethylene and at least one alpha-olefin having 3 to 20 carbon atoms, wherein:
(i) the starting low-molecular weight ethylene random copolymer contains 30% to 75% by mole of the ethylene component and 25% to 70% by mole of the alpha-olefin component;
(ii) the halogen content of the halogenated product is 5% to 75% by weight;
(iii) the intrinsic viscosity [η] of the halogenated product is 0.01 to 0.5 dl/g determined at 135°C in decalin;
(iv) the molecular weight distribution Mw/Mn of the halogenated product, wherein Mw and Mn represent a weight-average molecular weight and a number-average molecular weight, respectively, determined by gel permeation chromatography is 5 or less; and
(v) the number-average molecular weight of the halogenated product is 300 to 10000, determined by gel permeation chromatography.
This halogenated ethylene random copolymer is useful e.g. as a modifier for halogen-containing polymers.
由
乙烯和至少一种具有 3 至 20 个碳原子的α-烯烃组成的低分子量
乙烯无规共聚物的卤化产物,其中:
(i) 起始低分子量
乙烯无规共聚物含有 30%至 75%(以摩尔计)的
乙烯组分和 25%至 70%(以摩尔计)的α-烯烃组分;
(ii) 卤化产品的卤素含量为 5%至 75%(按重量计);
(iii) 卤化产品的固有粘度[η]为 0.01 至 0.5 分升/克,在 135℃
癸醛中测定;
(iv) 通过凝胶渗透色谱法测定的卤代产品的分子量分布 Mw/Mn(其中 Mw 和 Mn 分别代表重均分子量和数均分子量)为 5 或以下;以及
(v) 经凝胶渗透色谱法测定,卤化产物的数均分子量为 300 至 10000。
这种卤化
乙烯无规共聚物可用作含卤聚合物的改性剂等。