Grafted, crosslinked propylene¨ copolymers

摘要

Copolymers (I) of propylene (P) and up to 35 wt.% other 2-10C 1-alkenes (II), grafted with alpha,beta-unsatd. carboxylic acids or derivs. (III) are claimed. (I) are obtd. by reaction of (III) with the (P) copolymer at 1-500 bar in the absence of radical initiators, by adding 0.01-1 wt.% (III) to the molten copolymer and carrying out the grafting reaction at 210-350 deg.C. Also claimed are (a) crosslinked copolymers obtd. by reaction of (I) with organic crosslinkers (IV) at 1-500 bar and 21-0350 deg. 210-350 deg.C. (b) the crosslinking process, (c) crosslinkable copolymers obtd. by mixing (IV) with (I) for less than 30 secs. at 1-500 bar and below 210 deg.C and rapidly cooling the mixt. and (d) ionomers obtd. by reacEP467178A - A3tion of (I) with salts of (in)organic acids and alkali, alkaline earth or transition metals. The copolymer specifically consists of 40-95 wt.% homo-polypropylene and 5-60 wt.% statistical copolymer of (P) and (II), or a statistical copolymer contg. up to 20 wt.% (II); process (e) is carried out at not above 200 deg.C for not above 25 secs.