METHOD OF PRODUCING THERMOPLASTIC ELASTOMER COMPOSITION AND THERMOPLASTIC ELASTOMER COMPOSITION PRODUCED THEREBY.

摘要

The following are claimed: (A) prepn. of a partially crosslinked thermoplastic elastomer compsn. comprising (I) feeding to the cylinder of a extruder from a hopper a mixt. contg. (a) 90-40 wt.% of a peroxide-crosslinking olefin copolymer; (b) 10-60 wt.% peroxide-decomposable plastic; and (c) 0-100 wt.% peroxide-noncrosslinkable hydrocarbon rubber; (II) adding from another part of the cylinder a mineral oil softening agent (opt. with silconeoil) into the mixt. in (I), and then (III) heat-treating the mixt. dynamically in the presence of peroxide. (B) prepn. of the compsn. comprising the same steps as (A), but wherein the mixt. of (a), (b) opt. (c) is added in the hopper in such a manner that the residence time of the mixt. in the hopper is less than 10 min.; and (C) prods. of (A) and (B).