# US 2014/0155534 A1 · Resin composition and molded article composed of the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155534 A1 - Document ID: US20140155534A1 - Status: Published application - Kind: A1 - Application number: 14/174,606 - Filed: 2014-02-06 - Published: 2014-06-05 - Earliest claimed: 2005-07-08 - Assignees: Toray Industries, Inc. - Applicants: Toray Industries, Inc. - Inventors: Sadanori KUMAZAWA; Yuki AMANO; Hiroyuki OHME - Web page: https://patentgrep.com/patent/US20140155534A1 ## CPC - C08L 51/003: {grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C08L51/04, C08L51/06 take precedence)} - C08F 285/00: Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers - C08F 289/00: Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00 - C08L 33/10: Homopolymers or copolymers of methacrylic acid esters - C08L 51/04: grafted on to rubbers - C08L 51/08: grafted on to macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds - C08L 51/085: {on to polysiloxanes} - C08L 51/10: grafted on to inorganic materials - C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) - C08L 51/00: Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds (for ABS polymers C08L55/02); Compositions of derivatives of such polymers - C08L 2205/02: containing two or more polymers of the same C08L -group - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS ## Abstract A resin composition comprising a polylactic acid-based resin (A) and methacrylic resins (B), wherein the methacrylic resins having at least (a) a difference of 10° C. or more in glass transition temperature or (b) a difference of 3% or more in syndiotacticity; it is preferred that at least one of the methacrylic resins (B) is a methacrylic resin having a weight average molecular weight of 50,000 to 450,000, a glass transition temperature of 110° C. or higher and a syndiotacticity of 40% or more, and that the resin composition further contains a multilayer structure polymer formed as particles each consisting of a core layer and one or more shell layers covering it (C). A molded article made of said resin composition. ## Claims ### Claim 1 A resin composition comprising (A) a polylactic acid resin and (B) a methacrylic resin, wherein the ratio (syndiotacticity/isotacticity) of the syndiotacticity to the isotacticity of the methacrylic resin (B) in the resin composition is 3.0 to 8.0. ### Claim 2 (depends on 1) The resin composition, according to claim 1, wherein at least one of the methacrylic resins (B) is a methacrylic resin with a weight average molecular weight of 50,000 to 450,000, a glass transition temperature of 110° C. or higher and a syndiotacticity of 40% or more. ### Claim 3 (depends on 1) The resin composition, according to claim 1, further comprising (C) a multilayer structure polymer formed from particles each consisting of a core layer and at least one or more shell layers covering the core layer. ### Claim 4 (depends on 3) The resin composition, according to claim 3, wherein the multilayer structure polymer (C) satisfies at least one of the following conditions: (c) the polymer has a refractive index of 1.45 to 1.50 and/or (d) the polymer contains a component with a glass transition temperature of 30° C. or lower. ### Claim 5 (depends on 3) The resin composition, according to claim 3, wherein the outermost layer of the multilayer structure polymer (C) is formed of a polymer containing methyl methacrylate units and/or methyl acrylate units. ### Claim 6 (depends on 3) The resin composition, according to claim 3, wherein the dispersed particle size of the multilayer structure polymer (C) in the resin composition is 1 to 1,000 nm. ### Claim 7 (depends on 3) The resin composition, according to claim 3, wherein the ratio (l/m) of the number of agglomerated particles (l) to the number of non-agglomerated particles (m) of the multilayer structure polymer (C) in the resin composition is 0 to 0.5. ### Claim 8 (depends on 1) The resin composition, according to claim 1, wherein further a reactive compound containing at least one type of functional groups selected from glycidyl groups, acid anhydride groups, carbodiimide groups and oxazoline groups is mixed as a reactive compound (D). ### Claim 9 (depends on 8) The resin composition, according to claim 8, wherein the reactive compound (D) is a polymer having a weight average molecular weight of 1,000 to 300,000 and containing glycidyl group-containing vinyl units. ### Claim 10 (depends on 1) The resin composition, according to claim 1, wherein further inorganic particles (E) are comprised, the length of the minor axes of the inorganic particles in the resin composition being 1 to 300 nm, and the length of the major axes being 1 to 1,000 nm. ### Claim 11 (depends on 10) The resin composition, according to claim 10, wherein the inorganic particles (E) contain silicon. ### Claim 12 (depends on 1) A molded article made of the resin composition as set forth in claim 1. ### Claim 13 (depends on 3) A molded article made of the resin composition as set forth in claim 3. ### Claim 14 (depends on 8) A molded article made of the resin composition as set forth in claim 8. ### Claim 15 (depends on 10) A molded article made of the resin composition as set forth in claim 10.