VERFAHREN ZUR IONISCHEN VERNETZUNG EINES ETHYLENCOPOLYMERISATS.

摘要

Prepn. of ionically crosslinked ethylene copolymers is claimed. Ethylene copolymers contg. 0.1-20 mol.% comonomers carrying alpha, beta-ethylenically unsatd.carboxylic acids or carboxylic gps. are homogeneously mixed with a water soluble metal salt at temp. higher than the melt. pt. of the ethylene copolymer. The melted copolymer and the aq. soln. of the metal salt are mixed in a mixing zone of a twin extruder at 140-200 deg.C followed by increasing the temp. of the mixt. up to 230 deg.C in the next. zone. The concn. of the metal salt in the aq. soln. is pref. at least 10 wt.%. The temp. of the mixing zone = 160-180 deg.C and that of the next zone = 200-225 deg.C.