# US 2010/0168332 A1 · Polylactic Acid Resin Composition and Molded Product Using the Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0168332 A1 - Document ID: US20100168332A1 - Status: Published application - Kind: A1 - Application number: 12/649,471 - Filed: 2009-12-30 - Published: 2010-07-01 - Earliest claimed: 2008-12-30 - Assignees: Cheil Industries Inc. - Inventors: Young-Mi CHUNG; Doo-Han HA; Chang-Do JUNG - Web page: https://patentgrep.com/patent/US20100168332A1 ## CPC - C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) - C08L 25/12: with unsaturated nitriles - C08L 33/08: Homopolymers or copolymers of acrylic acid esters - C08L 51/04: grafted on to rubbers - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Disclosed are a polylactic acid resin composition that includes (A) about 10 to about 80 wt % of a polylactic acid resin; (B) about 5 to about 50 wt % of a rubber modified vinyl-based graft copolymer; (C) about 10 to about 80 wt % of a vinyl-based copolymer; and (D) about 5 to about 75 wt % of poly(meth)acrylic acid alkyl ester, and a molded product made using the same. ## Claims ### Claim 1 A polylactic acid resin composition comprising: (A) about 10 to about 80 wt % of a polylactic acid resin; (B) about 5 to about 50 wt % of a rubber modified vinyl-based graft copolymer; (C) about 10 to about 80 wt % of a vinyl-based copolymer; and (D) about 5 to about 75 wt % of poly(meth)acrylic acid alkyl ester ### Claim 2 (depends on 1) The polylactic acid resin composition of claim 1, wherein the rubber modified vinyl-based graft copolymer (B) comprises about 5 to about 95 wt % of a vinyl-based polymer comprising about 50 to about 95 wt % of a first vinyl-based monomer comprising an aromatic vinyl monomer, an acrylic-based monomer, or a combination thereof; and about 5 to about 50 wt % of a second vinyl-based monomer comprising an unsaturated nitrile monomer, an acrylic-based monomer that is different from the first acrylic-based monomer of the rubber modified vinyl-based graft copolymer (B), or a combination thereof, which are grafted onto about 5 to about 95 wt % of a rubber polymer comprising a butadiene rubber, an acrylic rubber, an ethylene/propylene rubber, a styrene/butadiene rubber, an acrylonitrile/butadiene rubber, an isoprene rubber, an ethylene-propylene-diene terpolymer, a polyorganosiloxane/polyalkyl(meth)acrylate rubber composite, or a combination thereof. ### Claim 3 (depends on 1) The polylactic acid resin composition of claim 1, wherein the vinyl-based copolymer (C) comprises a copolymer comprising about 40 to about 95 wt % of a first vinyl-based monomer comprising an aromatic vinyl monomer, an acrylic-based monomer, a heterocyclic monomer, or a combination thereof; and about 5 to about 60 wt % of a second vinyl-based monomer comprising an unsaturated nitrile monomer, an acrylic-based monomer that is different from the first acrylic-based monomer of the vinyl-based copolymer (C), a heterocyclic monomer that is different from first heterocyclic monomer of the vinyl-based copolymer (C), or a combination thereof. ### Claim 4 (depends on 1) The polylactic acid resin composition of claim 1; wherein the poly(meth)acrylic acid alkyl ester (D) is derived from (meth)acrylic acid alkyl ester monomer represented by the following Chemical Formula 1: wherein in the above Chemical Formula 1, R2 is hydrogen or methyl, and R3 is substituted or unsubstituted C1 to C8 alkyl. ### Claim 5 (depends on 1) The polylactic acid resin composition of claim 1, wherein the poly(meth)acrylic acid alkyl ester (D) has a weight average molecular weight of about 10,000 to about 500,000 g/mol. ### Claim 6 (depends on 1) The polylactic acid resin composition of claim 1, wherein the polylactic acid resin composition includes about 0.01 to about 20 parts by weight of an (E) impact-reinforcing agent based on about 100 parts by weight of the polylactic acid resin composition. ### Claim 7 (depends on 6) The polylactic acid resin composition of claim 6, wherein the impact-reinforcing agent (E) comprises a core-shell type copolymer, a polyester-based copolymer, a polyolefin-based copolymer, or a combination thereof. ### Claim 8 (depends on 7) The polylactic acid resin composition of claim 7, wherein the core-shell type copolymer comprises a copolymer including an unsaturated compound grafted on to a rubber polymer, wherein the unsaturated compound comprises an acrylic-based monomer, a heterocyclic monomer, an aromatic vinyl monomer, an unsaturated nitrile monomer, or a combination thereof, and the rubber polymer is obtained polymerization of a monomer comprising a diene-based monomer, an acrylic-based monomer, a silicon-based monomer, or a combination thereof. ### Claim 9 (depends on 7) The polylactic acid resin composition of claim 7, wherein the polyester-based copolymer or polyolefin-based copolymer is a copolymer including an epoxy group or anhydride functional group grafted on to a polyester or polyolefin main chain. ### Claim 10 (depends on 1) A molded product made using the polylactic acid resin composition according to claim 1.