Polypropylene resin composition and foamed article produced therefrom
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United States of America Patent
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Nov 17, 2015
Grant Date -
Apr 27, 2006
app pub date -
Oct 24, 2005
filing date -
Oct 27, 2004
priority date (Note) -
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Abstract
Disclosed is a polypropylene resin composition comprising from 50 to 95 wt. % of propylene homopolymer component (A) and from 5 to 50 wt. % of ethylene-α-olefin copolymer component (B1), the polypropylene resin composition having a melt index of not less than 40 g/10 min but less than 500 g/10 min, provided that the percentages by weight are based on the combined weight of the components (A) and (B1), wherein the homopolymer component (A) has an intrinsic viscosity [η]A of from 0.5 to 1.4 dl/g, and wherein the ratio of the intrinsic viscosity [η]B1 of the copolymer component (B1) to the intrinsic viscosity [η]A of the homopolymer component (A), [η]B1/[η]A, is from 0.5 to 3. This composition may be modified by addition of a resin component selected from the group consisting of ethylene homopolymer and aromatic vinyl compound-containing rubber. These components are advantageously used for injection foam molding.
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