Abstract: Disclosed is a (meth)acrylate-based resin composition comprising a poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer comprising phenyl(meth)acrylate having excellent surface hardness and a high refractive index, as a base resin and a (conjugated diene (meth)acrylate) graft copolymer having excellent impact absorption efficiency, the (meth)acrylate-based resin composition providing excellent transparency by exhibiting excellent impact resistance even using a small amount of impact modifier. The (meth)acrylate-based resin composition having excellent impact resistance and transparency comprises 1 to 29 wt % of the (conjugated diene-(meth)acrylate) graft copolymer and 71 to 99 wt % of the poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer.

Abstract: Disclosed are a heat-resistant SAN resin, a method of producing the same and a heat-resistant SAN resin composition comprising the same. More specifically, disclosed are a heat-resistant SAN resin produced using ingredients comprising 52 to 78% by weight of alpha-methylstyrene, 20 to 40% by weight of a vinyl cyanide compound and 2 to 8% by weight of hydroxyalkyl (meth)acrylate, a method of producing the same and a heat-resistant SAN resin composition comprising the same. Advantageously, provided are a heat-resistant SAN resin with maintained heat resistance, improved polymerization conversion rate and increased weight average molecular weight, a method of producing the same, and a heat-resistant SAN resin composition containing the same with excellent chemical resistance, superior mechanical properties and good balance between properties.

Abstract: The present invention relates to method for preparing a modified acrylonitrile-butadiene-styrene resin having excellent matteness, impact resistance, and heat resistance, as well as having a low total volatile organic compounds content, and to a modified acrylonitrile-butadiene-styrene resin prepared thereby.

Abstract: Provided is a styrene resin composition including ?-methyl styrene, acrylonitrile and t-butyl methacrylate, and having an improved conversion rate while maintaining excellent mechanical and chemical properties, a styrene resin composition including the same, and a styrene resin molded product manufactured therefrom. Accordingly, the heat-resistant styrene copolymer is effective in improving a conversion rate without deformation and mechanical and chemical property decline of the material itself, and as a result, commercialization may be readily accomplished due to enhanced productivity. In addition, the styrene resin molded product manufactured from the styrene resin composition according to the present invention includes the heat-resistant styrene copolymer as a matrix copolymer, and therefore, has excellent impact strength, tensile strength, tensile elongation and flowability while having high heat resistance.

Abstract: The present invention relates to a retardation film that comprises a blend resin of 1) an acryl-based copolymer resin that comprises an alkyl methacrylate-based monomer and a cycloalkyl methacrylate-based monomer, and 2) a resin that comprises an aromatic ring or aliphatic ring in a polymer main chain, a method for manufacturing the retardation film, and a liquid crystal display device that comprises the retardation film. The retardation film according to the present invention has excellent heat resistance, optical transparency, mechanical strength, and durability.

Abstract: Disclosed are a heat-resistant SAN resin, a method of producing the same and a heat-resistant SAN resin composition comprising the same. More specifically, disclosed are a heat-resistant SAN resin produced using ingredients comprising 52 to 78% by weight of alpha-methylstyrene, 20 to 40% by weight of a vinyl cyanide compound and 2 to 8% by weight of hydroxyalkyl (meth)acrylate, a method of producing the same and a heat-resistant SAN resin composition comprising the same. Advantageously, provided are a heat-resistant SAN resin with maintained heat resistance, improved polymerization conversion rate and increased weight average molecular weight, a method of producing the same, and a heat-resistant SAN resin composition containing the same with excellent chemical resistance, superior mechanical properties and good balance between properties.

Abstract: Provided is a styrene resin composition including ?-methyl styrene, acrylonitrile and vinyl imidazole, and having an improved conversion rate while maintaining excellent mechanical and chemical properties, a styrene resin composition including the same, and a styrene resin molded product manufactured therefrom. Accordingly, the heat-resistant styrene copolymer is effective in improving a conversion rate without deformation and mechanical and chemical property decline of the material itself, and as a result, commercialization may be readily accomplished due to enhanced productivity. In addition, the styrene resin molded product manufactured from the styrene resin composition according to the present invention includes the heat-resistant styrene copolymer as a matrix copolymer, and therefore, has excellent impact strength, tensile strength, tensile elongation and flowability while having high heat resistance.

Abstract: Provided are a resin composition for an optical film including an alkyl(meth)acrylate unit, a benzyl(meth)acrylate unit, a (meth)acrylic acid unit, and a unit expressed by Chemical Formula I, an optical film, a polarizing plate, and an image display device using the resin composition.

Abstract: Disclosed are a heat-resistant SAN resin, a method of preparing the same, and a heat-resistant ABS resin composition comprising the same. More particularly, a heat-resistant SAN resin comprising 60 to 75 wt % of ?-methylstyrene, 25 to 35 wt % of a vinyl cyan compound, and 0 to 10 wt % of an aromatic vinyl compound (except for ?-methylstyrene), the heat-resistant SAN resin having a degree of branching of 0.40 to 0.60, a molecular weight of 90,000 to 150,000 g/mol, and a glass transition temperature (Tg) of 124 to 140° C., a method of preparing the same, and a heat-resistant ABS resin composition comprising the same are disclosed.

Abstract: There is provided a method for preparing an acrylic copolymer resin for an optical film includes: suspension-polymerizing an acrylic monomer containing a benzene ring, an alkyl(meth)acrylate monomer, and a (meth)acrylic acid monomer to prepare a copolymer; and thermally treating the copolymer at a temperature ranging from 240° C. to 300° C. As the method for preparing an acrylic copolymer of the present invention, a resin having an effectively lowered CTE can be manufactured by inducing the formation of a glutaric anhydride structure by using suspension polymerization that facilitates adjustment of the molecular weight of a resin.

Abstract: Disclosed is a (meth)acrylate-based resin composition comprising a poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer comprising phenyl(meth)acrylate having excellent surface hardness and a high refractive index, as a base resin and a (conjugated diene (meth)acrylate) graft copolymer having excellent impact absorption efficiency, the (meth)acrylate-based resin composition providing excellent transparency by exhibiting excellent impact resistance even using a small amount of impact modifier. The (meth)acrylate-based resin composition having excellent impact resistance and transparency comprises 1 to 29 wt % of the (conjugated diene-(meth)acrylate) graft copolymer and 71 to 99 wt % of the poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer.

Abstract: Disclosed are a heat-resistant SAN resin, a method of preparing the same, and a heat-resistant ABS resin composition comprising the same. More particularly, a heat-resistant SAN resin comprising 60 to 75 wt % of ?-methylstyrene, 25 to 35 wt % of a vinyl cyan compound, and 0 to 10 wt % of an aromatic vinyl compound (except for ?-methylstyrene), the heat-resistant SAN resin having a degree of branching of 0.40 to 0.60, a molecular weight of 90,000 to 150,000 g/mol, and a glass transition temperature (Tg) of 124 to 140° C., a method of preparing the same, and a heat-resistant ABS resin composition comprising the same are disclosed.

Abstract: Provided is an acrylic copolymer comprising; an alkyl (meth)acrylate monomer; a monomer comprising a cyclic pendant structure; and a tert-butyl (meth)acrylate monomer and/or (meth)acrylamide monomer. Also provided is a resin composition comprising the same and an optical film and an IPS mode liquid crystal display device using the same.

Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alkyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.

Abstract: The present invention relates to an acrylic copolymer having high heat resistance and high strength, and an optical film comprising the same, and more particularly, to an acrylic copolymer for optical films in which alkyl (meth)acrylate monomers; (meth)acrylate monomers comprising aromatic rings and/or aliphatic rings; and (meth)acrylamide monomers are included and polymerized. An acrylic copolymer according to the present invention is excellent in heat resistance while maintaining transparency. Further, an optical film comprising a compound resin including the acrylic copolymer has superior transparency and heat resistance and is excellent in formability, adhesion, retardation properties, and durability.

Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alkyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.

Abstract: The present invention relates to a resin composition for an optical film comprising a copolymer which includes an alkyl (meth)acrylate unit, a (meth)acrylate unit having a benzene ring, and a (meth)acrylic acid unit, wherein a content of a residual monomer is less than 2000 ppm in the resin composition and an optical film using the same.

Abstract: Provided are a resin composition for an optical film including an alkyl(meth)acrylate unit, a benzyl(meth)acrylate unit, a (meth)acrylic acid unit, and a unit expressed by Chemical Formula I, an optical film, a polarizing plate, and an image display device using the resin composition.

Abstract: There is provided a method for preparing an acrylic copolymer resin for an optical film includes: suspension-polymerizing an acrylic monomer containing a benzene ring, an alkyl(meth)acrylate monomer, and a (meth)acrylic acid monomer to prepare a copolymer; and thermally treating the copolymer at a temperature ranging from 240° C. to 300° C. As the method for preparing an acrylic copolymer of the present invention, a resin having an effectively lowered CTE can be manufactured by inducing the formation of a glutaric anhydride structure by using suspension polymerization that facilitates adjustment of the molecular weight of a resin.

Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alklyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.