RESIN COMPOSITION AND MOLDED ARTICLE
A resin composition contains: 60 to 95% by mass of polyphenylene ether (A); 35 to 0% by mass of styrene-based resin (B); and 15 to 5% by mass of elastomer component (C). The component (C) is present as dispersion particles in the resin composition. The dispersion particles have a number average particle size of 0.04 to 0.25 μm.
1 . A resin composition comprising:
60 to 95% by mass of polyphenylene ether (A);
35 to 0% by mass of styrene-based resin (B); and
15 to 5% by mass of elastomer component (C),
wherein
the styrene-based resin (B) is a non-rubber-reinforced styrene-based resin;
the elastomer component (C) comprises a block copolymer having a styrene block and a hydrogenated conjugated diene compound block;
the block copolymer is a styrene block-hydrogenated conjugated diene compound block copolymer having a molecular weight of 60,000 to 1,500,000 and having a bound styrene amount of 50 to 80% by mass;
the elastomer component (C) is present as dispersion particles in the resin composition;
the dispersion particles have a number average particle size of 0.04 to 0.25 μm,
dispersion particles having a particle size of greater than 1.0 μm are not present, and
the number of the dispersion particles having a particle size of 0.5 to 1.0 μm is 3 or less in an area corresponding to 396 μm 2 as measured by transmission electron microscopy.
2 . The resin composition according to claim 1 , wherein the elastomer component (C) comprises an oil-extended styrene block-hydrogenated conjugated diene compound block copolymer.
3 . The resin composition according to claim 1 , wherein the elastomer component (C) comprises an oil-extended styrene block-hydrogenated conjugated diene compound block copolymer having an oil-extended amount of 20 to 50% by mass.
4 . The resin composition according to claim 2 , wherein the elastomer component (C) comprises the oil-extended styrene block-hydrogenated conjugated diene compound block copolymer having an oil-extended amount of 20 to 50% by mass and an olefin-based elastomer in a mass ratio of (the oil-extended styrene block-hydrogenated conjugated diene compound block copolymer having an oil-extended amount of 20 to 50% by mass: the olefin-based elastomer) =9:1 to 3:7.
5 . The resin composition according to claim 2 , wherein the resin composition comprises 15 to 100 parts by mass of an oil based on 100 parts by mass of the styrene block-hydrogenated conjugated diene compound block copolymer.
6 . The resin composition according to claim 1 , wherein the component (C) comprises a styrene block-hydrogenated conjugated diene compound block copolymer and/or an oil-extended styrene block-hydrogenated conjugated diene compound block copolymer and an olefin-based elastomer in a mass ratio of (the styrene block-hydrogenated conjugated diene compound block copolymer and/or the oil-extended styrene block-hydrogenated conjugated diene compound block copolymer/the olefin-based elastomer)=9:1 to 3:7, and
the resin composition comprises 15 to 100 parts by mass of an oil based on 100 parts by mass of the styrene block-hydrogenated conjugated diene compound block copolymer.
7 . A molded article for a light-reflecting part comprising the resin composition according to claim 1 .
8 . A molded article for an automotive lamp extension comprising the resin composition according to claim 1 .
9 . The resin composition according to claim 2 , wherein the component (C) comprises the oil-extended styrene block-hydrogenated conjugated diene compound block copolymer and an olefin-based elastomer in a mass ratio of (the oil-extended styrene block-hydrogenated conjugated diene compound block copolymer/the olefin-based elastomer)=9:1 to 3:7.