Thermoplastic resin composition and molded body thereof
View Patent ↗An object of the present invention is to provide a thermoplastic resin composition capable of improving impact resistance and surface gloss of a molded article, and a molded article thereof. A thermoplastic resin composition of the present invention is comprising 100 parts by weight of a thermoplastic resin (a) and 0.5 to 30 parts by weight of a core-shell polymer composition (b), wherein the core-shell polymer composition (b) is obtained by polymerizing the shell-constituting components in the presence of a core obtained by polymerizing a monomer mixture (100% by weight in total) of 70% to 99.95% by weight of an alkyl acrylate having an alkyl group of 2 to 18 carbon atoms, 0.05% to 10% by weight of a polyfunctional monomer, and 0% to 20% by weight of a monomer copolymerizable with the alkyl acrylate and the polyfunctional monomer, and the polyfunctional monomers contains at least a compound having a plurality of same radically polymerizable functional groups in the molecule thereof.
1. A thermoplastic resin composition comprising 100 parts by weight of a thermoplastic resin (a) and 0.5 to 30 parts by weight of a core-shell polymer composition (b),
wherein the core-shell polymer composition (b) is obtained by polymerizing a shell-constituting component in the presence of a core obtained by polymerizing a core-constituting component,
the core-constituting component contains 70% to 99.95% by weight of an alkyl acrylate having an alkyl group of 2 to 18 carbon atoms, 0.05% to 10% by weight of a polyfunctional monomer, and 0% to 20% by weight of a monomer copolymerizable with the alkyl acrylate and/or the polyfunctional monomer, the total amount of which is 100% by weight,
100% by weight of the polyfunctional monomer consists of 51% to 100% by weight of a compound having a plurality of same radically polymerizable functional groups in the molecule thereof and 0% to 49% by weight of a compound having a plurality of different radically polymerizable functional groups in the molecule thereof,
the molecular weight of a component soluble in methyl ethyl ketone and insoluble in methanol of the core-shell polymer composition (b) is 700,000 to 1,200,000, and the content of the component is 5% to 20% in the core-shell polymer composition (b).
2. The thermoplastic resin composition according to claim 1 , wherein a main chain of the compound having a plurality of same radically polymerizable functional groups in the molecule thereof has a repeating structure composed mainly of alkylene glycol units and the number of repeating units of the repeating structure is 3 or higher in average.
3. The thermoplastic resin composition according to claim 1 , wherein the compound having a plurality of different radically polymerizable functional groups in the molecule thereof has an allyl group.
4. The thermoplastic resin composition according to claim 1 , wherein the core-shell polymer composition (b) contains 50% to 95% by weight of the core-constituting component and 5% to 50% by weight of the shell-constituting component, based on the total amount of the core-shell polymer composition (b) being 100% by weight.
5. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin (a) is a vinyl chloride based resin.
6. A molded article obtained by molding the thermoplastic resin composition according to claim 5 .
7. The molded article according to claim 6 , wherein the molded article is a window frame or a door frame.
8. The molded article according to claim 6 , wherein the molded article is a siding.