Thermoplastic resin composition, molded article, and manufacturing method of molded article
AssigneeCanon Kabushiki Kaisha
InventorsTakahiro Kojima, Daisuke Kurihara, Kosuke Nishino
Life of this patent
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Abstract
An impact resistance is improved and a molding shrinkage percentage is reduced. A thermoplastic resin composition contains: an impact-resistant styrene resin composition which contains polystyrene as a main component and a dispersed rubber phase and in which a volume fraction of the dispersed rubber phase 12 is less than 30%; dispersed phases of elastomer; and particles of a filler. The dispersed phases of the elastomer contains, as a main component, a styrene-butadiene copolymer serving as a linear copolymer constructed by a triblock consisting of a butadiene block and styrene blocks coupled with both ends of the butadiene block.
Claims15
A thermoplastic resin composition comprising:
- an impact-resistant styrene resin composition which contains polystyrene as a main component and a dispersed rubber phase and in which a volume fraction of the dispersed rubber phase is less than 30%;
- elastomer;
- and
- a filler,
- wherein the elastomer contains, as a main component, a styrene-butadiene copolymer serving as a linear copolymer constructed by a triblock consisting of a butadiene block and styrene blocks coupled with both ends of the butadiene block.
A thermoplastic resin composition comprising:
- an impact-resistant styrene resin composition which contains polystyrene as a main component and a dispersed rubber phase and in which a volume fraction of the dispersed rubber phase is less than 30%;
- elastomer;
- and
- a filler,
- wherein the elastomer contains a styrene-butadiene copolymer as a main component,
- a part or all of dispersed phases of the elastomer are in contact with the filler, and
- in a cross section of the thermoplastic resin composition, assuming that a total area of the filler is equal to 1, among the dispersed phases of the elastomer, a total area of the dispersed phases of the elastomer which are in contact with the filler lies within a range between 0.2 or more and 0.4 or less.
A molded article comprising:
- an impact-resistant styrene resin composition which contains polystyrene as a main component and a dispersed rubber phase and in which a volume fraction of the dispersed rubber phase is less than 30%;
- elastomer containing a styrene-butadiene copolymer as a main component;
- and
- a filler,
- wherein a Charpy impact value is equal to 5.0 or more (kJ/m2).
Dependencies are inferred from the claim text.