Riken Technos Corporation

Takaaki Suka

Michihisa Tasaka

A thermoplastic elastomer composition excellent in softness, permanent compression set (both short- and long-term), and controlled in bleed-out of the softening agent as well as a formed article and composite formed article of the above thermoplastic elastomer composition. The thermoplastic elastomer composition contains: (a) 100 parts by weight of at least one hydrogenated block copolymer, (b) 30 to 150 parts by weight of a non-aromatic-type softening agent for rubber; and (c) 3 to 100 parts by weight of a petroleum hydrocarbon resin having a softening point of 80 to 170&#xb0; C., the resin exhibiting a melt viscosity of 10 poise at a temperature in the range of 120 to 250.

Thermoplastic elastomer composition, formed article of the same and composite formed article of the same

It is an object of the present invention to provide a thermoplastic elastomer composition excellent in softness, permanent compression set (both short- and long-term) and resistance to oil, and controlled in bleed-out of the softening agent. It is another object of the present invention to provide a formed article and composite formed article of the above thermoplastic elastomer composition. The present invention provides a thermoplastic elastomer composition containing (a) 100 parts by weight of at least one hydrogenated block copolymer, (b) 30 to 150 parts by weight of a non-aromatic-based softening agent for rubber and (c) 3 to 100 parts by weight of a thermoplastic resin having a melting point of 70 to 140&deg; C., determined by the DSC analysis, and melt viscosity of 400 to 100,000 cps at 140&deg; C., and formed article and composite formed article thereof.

Growing community of inventors

Tokyo, Japan

Takaaki Suka