Thermoplastic resin composition, for e.g. the production of tubes and seals, comprises a thermoplastic resin and an olefin polymer of defined flexural modulus.

摘要

A thermoplastic resin composition comprises 5-95 wt.% of a thermoplastic resin having a melt index of 0.001-100 g/10 min (230 deg C, 2.16 kg) and a form swelling ratio of less than 1.7 and 5-95 wt.% of an olefin polymer of defined flexural modulus. A thermoplastic resin composition (I) comprises (A) 5-95 wt.% of a thermoplastic resin having a melt index of 0.001-100 g/10 min (230 deg C, 2.16 kg) and a form swelling ratio of less than 1.7; and (B) 5-95 wt.% of an olefin polymer that obeys equation (1). Ua <= 1.5/*Sa/*(Ta//100)<3.3> (1) Ua = flexural modulus (MPa) (JIS K7203) of a resin composition comprising 50 pts.wt. of an olefin polymer and 50 pts.wt. of a homopolypropylene resin having a flexural modulus (Sa)(JIS K7203) of 1400 /! 100 MPa, a melt index of 12/!3 g/10 min (230 deg C, 2.16 kg) and a peak (m.pt.) of 162 /! 3 deg C as measured using a DSC (JIS K7122); Sa = flexural modulus (MPa, JIS K7203) of the homopolypropylene resin); Ta = content ratio (50 wt.%) of the homopolypropylene resin in the resin composition