# US 11,306,203 B2 · Rubber-containing graft polymer, resin composition containing rubber-containing graft polymer, and shaped article thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,203 B2 - Document ID: US11306203B2 - Status: Granted - Kind: B2 - Application number: 16/818,306 - Filed: 2020-03-13 - Published: 2020-07-09 - Granted: 2022-04-19 - Earliest claimed: 2017-10-04 - Assignees: Mitsubishi Chemical Corporation - Applicants: Mitsubishi Chemical Corporation - Inventors: Shinji Matsuoka; Naotaka Suenaga; Saki Fujita; Masashi Iimori; Yuuta Maenaka; Misaki Hagi; Hiroya Arai - Web page: https://patentgrep.com/patent/US11306203B2 ## CPC - C08F 283/12: on to polysiloxanes - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - C08F 265/06: Polymerisation of acrylate or methacrylate esters on to polymers thereof - C08F 279/02: on to polymers of conjugated dienes - C08F 285/00: Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers - C08L 101/00: Compositions of unspecified macromolecular compounds - C08L 25/12: with unsaturated nitriles - C08L 2205/14: containing polymeric additives characterised by shape - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Provided is a rubber-containing graft polymer that can be uniformly dispersed in a thermoplastic resin containing an alloy in a particle size of 100 to 300 nm and can improve strength developability required as a rubber-containing graft polymer. In a rubber-containing graft polymer (A) of the present invention, a rubber to be grafted has a particle size of 100 to 300 nm, a content of an organic solvent insoluble component in the rubber-containing graft polymer (100% by mass) is 92% to 99.5% by mass, and an organic solvent soluble component of the rubber-containing graft polymer has a weight average molecular weight of 250,000 to 700,000. ## Claims ### Claim 1 A rubber-containing graft polymer, wherein a rubber to be grafted has a particle size of 100 to 300 nm, a content of an organic solvent insoluble component in the rubber-containing graft polymer (100% by mass) is 92% to 99.5% by mass, and an organic solvent soluble component of the rubber-containing graft polymer has a weight average molecular weight of 250,000 to 700,000. ### Claim 2 (depends on 1) The rubber-containing graft polymer according to claim 1, wherein a content of a methyl methacrylate-derived product in the organic solvent soluble component (100% by mass) of the rubber-containing graft polymer is 84% by mass or more. ### Claim 3 A rubber-containing graft polymer having, a content of a methyl methacrylate-derived product of 43% or higher grafted to the rubber-containing graft polymer, and a content of an organic solvent soluble component with a styrene-equivalent molecular weight of 300,000 or more determined by integral molecular weight distribution of 10% or higher obtainable by freeze-grinding an organic solvent insoluble component of the rubber-containing graft polymer. ### Claim 4 A rubber-containing graft polymer, which is obtainable by polymerizing, using a persulfate, a vinyl monomer for grafting containing 95% by mass or more of methyl methacrylate to rubber latex with a volume average particle size of 100 to 300 nm, which is obtainable by polymerizing, using a persulfate, 0.5 to 3.0 parts by mass of an aromatic vinyl monomer containing 100 parts by mass of acrylate (a1) and 0.1 to 0.7 parts by mass of allyl methacrylate (a2), or before polymerizing the vinyl monomer for grafting containing 95% by mass or more of the methyl methacrylate. ### Claim 5 (depends on 1) A resin composition containing a rubber-containing graft polymer, comprising: the rubber-containing graft polymer according to claim 1; and a thermoplastic resin (B). ### Claim 6 (depends on 5) The resin composition containing a rubber-containing graft polymer according to claim 5, wherein the thermoplastic resin (B) comprises an aromatic polycarbonate (b1). ### Claim 7 (depends on 5) The resin composition containing a rubber-containing graft polymer according to claim 5, wherein the thermoplastic resin (B) comprises a styrene-based resin (b2). ### Claim 8 (depends on 5) The resin composition containing a rubber-containing graft polymer according to claim 5, wherein the thermoplastic resin (B) comprises polyester (b3). ### Claim 9 (depends on 5) A shaped article obtained by shaping the resin composition containing a rubber-containing graft polymer according to claim 5. ### Claim 10 (depends on 9) The shaped article according to claim 9, which is an injection molded article. ### Claim 11 (depends on 1) The rubber-containing graft polymer according to claim 1, wherein the organic solvent insoluble components are components of (Rg+R0) derived from the rubber cross-linking component, wherein: Rg is a rubber cross-linking component and graft chain derived from vinyl monomer chemically bonding thereto; and R0 is a non-grafted rubber cross-linking component. ### Claim 12 (depends on 1) The rubber-containing graft polymer according to claim 1, wherein the rubber-containing graft polymer comprises: a rubber cross-linking component and graft chain derived from vinyl monomer chemically bonding thereto; a non-grafted rubber cross-linking component; a non-gross-linking rubber component and graft chain derived from vinyl monomer chemically bonding thereto; and a non-grafted rubber non-cross-linking component. ### Claim 13 (depends on 1) The rubber-containing graft polymer according to claim 1, wherein the rubber-containing graft polymer has a graft chain with length of 250,000 to 700,000 in terms of a weight average molecular weight. ### Claim 14 (depends on 1) The rubber-containing graft polymer according to claim 1, wherein a content of a methyl methacrylate-derived product in the graft chain is 84% by mass or more.