The present invention relates to a method for producing a modified propylene-based polymer containing modifying a propylene-based polymer by a radical initiator and an organic acid, a modified propylene-based polymer obtained by the method, and an adhesive composition containing the modified propylene-based polymer. The propylene-based polymer is a propylene homopolymer satisfying the conditions of (a) mmmm=20 to 60 mol %, (b) [rrrr/(1-mmmm)]≦0.1, (c) rmrm>2.5 mol %, (d) mmxrr/(mr)
2
=<2.0, and (e) the weight ratio (W25) of components eluted at 25° C. or lower in a temperature programmed chromatography is 20 to 100% by weight, or a propylene copolymer satisfying the condition of (h) the stereoregularity index (P) obtained by
13
C-NMR measurement is 55 to 90 mol %. The modified propylene-based polymer of the invention can make a polyolefin, etc. more adhesive, stronger, or flexible, to be useful for a high-adhesive sealant or an polyolefin with increased compatibility to an inorganic filler, etc., particularly as a resin for a hot-melt adhesive.
本发明涉及一种生产改性
丙烯基聚合物的方法,包括用自由基
引发剂和有机酸对
丙烯基聚合物进行改性,通过该方法获得的改性
丙烯基聚合物,以及含有改性
丙烯基聚合物的粘合剂组合物。
丙烯基聚合物是符合以下条件的
丙烯均聚物:(a) mmmm=20 至 60 摩尔%;(b) [rrrr/(1-mmmm)]≦0.1 ;(c) rmrm>2.5 摩尔%;(d) mmxrr/(mr)
2
=<2.0,以及 (e) 在温度程序色谱法中,在 25° C 或更低温度下洗脱的组分的重量比 (W25) 为 20%至 100%(按重量计),或丙烯共聚物满足以下条件 (h) 通过以下方法获得立体均匀性指数 (P):(a) 在温度程序色谱法中,在 25° C 或更低温度下洗脱的组分的重量比 (W25) 为 20%至 100%(按重量计)。
13
C-NMR 测量得到的立体规整度指数 (P) 为 55 至 90 摩尔%。本发明的改性丙烯基聚合物可以使聚烯烃等具有更高的粘合性、强度或柔韧性,从而可用于高粘合性密封剂或增加聚烯烃与无机填料等的相容性,特别是作为热熔粘合剂的
树脂。