Piping member formed by using propylene-based resin composition
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United States of America Patent
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Jan 1, 2013
Grant Date -
Feb 11, 2010
app pub date -
Feb 1, 2008
filing date -
Feb 16, 2007
priority date (Note) -
Expired
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Abstract
Disclosed are a piping member formed by using a propylene-based resin composition comprising 100 parts by mass of a propylene-ethylene random copolymer (A) having an ethylene content of 2 to 5%, a crystallization temperature of 86 to 105° C., a melt flow rate of 0.01 to 2.00 g/10 min and a molecular weight distribution of 3 to 8, and 1 to 15 parts by mass of a styrene-butadiene-base rubber (B) having a styrene content of 10 to 40% and a weight average molecular weight of 200,000 or more as essential components, a melt flow rate after kneading being from 0.01 to 2.00 g/10 min, characterized in that the propylene-based resin composition further comprising a hindered amine-based light stabilizer (C) having a weight average molecular weight of 2,000 or more in the amount of 0.1 to 1.0 parts by mass based on 100 parts by mass of the propylene-ethylene random copolymer; and a piping member formed by using a propylene-based resin composition, wherein the styrene-butadiene-base rubber is a hydrogenated styrene-butadiene block copolymer rubber.
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