Riken Vinyl Industry Co., Ltd

Riken Technos Corporation

Hiromasa Sanada

Toshio Ito

Michihisa Tasaka

Naoyuki Ono

Naohisa Miyakawa

Tomozo Ogawa

An extrusion molded article for automobiles, having a body portion () and a hollow sealing portion (), where the body portion () comprises a core () made of a resin having a U-shaped cross-section extending in a longitudinal direction and a covering layer () surrounding and covering the core partly or entirely, and the hollow sealing portion () is bonded integrally with an outer surface () of the body portion, characterized in that the covering layer () is made of a thermoplastic elastomer composition having a tensile elongation at break of at least 350%, as determined according to JIS K6251, and a change in 100% modulus of at most 40%,

Extrusion molded article for automobiles

The invention provides a process for the preparation of a thermoplastic elastomeric resin composition comprising (a) 100 parts by weight of a block copolymer consisting of at least two polymeric blocks (A) composed of a vinyl aromatic compound and at least one polymeric block (B) composed of a conjugated diene compound, or a hydrogenated block copolymer, (b) 20 to 300 parts by weight of a non-aromatic softening agent for rubber, (c) 1 to 100 parts by weight of a peroxide-crosslinking type olefinic resin or a copolymeric rubber containing said resin, and (d) 10 to 150 parts by weight of a peroxide-decomposition type olefinic resin or a copolymer containing said resin, characterized in that the process comprises a step of heat-processing component (a), component (b), at least a part of component (c) and a part of component (d) in the presence of an organic peroxide to cause crosslinking, and a subsequent step of blending these with the remaining part of component (d) and, if any, the remaining part of component (c). The obtained composition is soft and good in rubber properties, mechanical strength and processability, and is less sticky.

Thermoplastic elastomeric resin composition and a process for the

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Tokyo, Japan

Hiromasa Sanada