Patent ID: 6433062
Filing Date: 2002-08-13
Classification: C08L

Abstract:
A process for the preparation of a thermoplastic elastomeric resin composition comprising melt kneading(a) 100 parts by weight of a block copolymer consisting of at least two polymeric blocks (A) composed mainly of a vinyl aromatic compound and at least one polymeric block (B) composed mainly of a conjugated diene compound, and/or a hydrogenated block copolymer obtained by hydrogenating said block copolymer, (b) 40 to 240 parts by weight of a non-aromatic softening agent for rubber, (c) 5 to 300 parts by weight of polyethylene or a copolymer composed mainly of ethylene, and (d) 5 to 60 parts by weight of polypropylene or a copolymer composed mainly of propylene, characterized in that the process comprises the following steps:(I) melt kneading the whole amounts of components (a), (b) and (d) and a part of component (c), and, at the same time or subsequently, melt kneading these with (f) an organic peroxide, and (II) melt kneading the product obtained from step (I) with the remaining part of component (c), and component (c) is one which has been prepared using a single site catalyst.