Abstract: Provided is a polarizer protective film, which has high heat resistance, high transparency, high optical characteristics, and high mechanical strength, and is excellent in adhesion with respect to a polarizer. Further, provided are a polarizing plate using such a polarizer protective film and a polarizer, which has high adhesion with respect to the polarizer protective film and the polarizer and is excellent in optical characteristics, and an image display apparatus of high quality using such a polarizing plate. A polarizer protective film according to the present invention includes a (meth)acrylic resin having a lactone ring structure and core-shell type nanoparticles having a core layer made of a rubber polymer and a shell layer made of a glass polymer.

Abstract: Disclosed is an optical planar thermoplastic resin composition including a lactone ring-containing polymer as a main component thereof, or including a lactone ring-containing polymer and at least one other thermoplastic resin. The optical planar thermoplastic resin composition of the present invention has high transparency, high heat resistance, and high optical isotropy, and therefore, can sufficiently exhibit characteristics according to various optical applications.

Abstract: To realize a resin composition which enables formation of a film having excellent film formability and bending resistance and having a small retardation. A resin composition of the present invention comprises: an acrylic resin as a main component; and organic fine particles whose average particle diameter ranges from 0.01 ?m to 1 ?m, wherein a glass transition temperature of the acrylic resin ranges from 110° C. to 200° C., and each of the organic fine particles has a structural unit of a vinyl cyanide monomer and a structural unit of an aromatic vinyl monomer.

Abstract: Disclosed is a thermoplastic resin composition contains including a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, and at least one kind of metal compound selected from metal salts, metal complexes, and metal oxides, wherein a content of the metal compound in the composition is from 10 to 10,000 ppm in terms of metal atom based on a mass of the methacrylic resin, and a process for producing such a thermoplastic resin composition, the process including carrying out, when preparing a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, cyclization condensation reaction using a catalyst to form the ring structure; and then adding a deactivator of the catalyst.

Abstract: To realize a resin composition which enables formation of a film having excellent film formability and bending resistance and having a small retardation. A resin composition of the present invention comprises: an acrylic resin as a main component; and organic fine particles whose average particle diameter ranges from 0.01 ?m to 1 ?m, wherein a glass transition temperature of the acrylic resin ranges from 110° C. to 200° C., and each of the organic fine particles has a structural unit of a vinyl cyanide monomer and a structural unit of an aromatic vinyl monomer.

Abstract: Disclosed is an optical planar thermoplastic resin composition including a lactone ring-containing polymer as a main component thereof, or including a lactone ring-containing polymer and at least one other thermoplastic resin. The optical planar thermoplastic resin composition of the present invention has high transparency, high heat resistance, and high optical isotropy, and therefore, can sufficiently exhibit characteristics according to various optical applications.

Abstract: Provided is a polarizer protective film, which has high heat resistance, high transparency, high optical characteristics, and high mechanical strength, and is excellent in adhesion with respect to a polarizer. Further, provided are a polarizing plate using such a polarizer protective film and a polarizer, which has high adhesion with respect to the polarizer protective film and the polarizer and is excellent in optical characteristics, and an image display apparatus of high quality using such a polarizing plate. A polarizer protective film according to the present invention includes a (meth)acrylic resin having a lactone ring structure and core-shell type nanoparticles having a core layer made of a rubber polymer and a shell layer made of a glass polymer.

Abstract: The present invention is to provide: a polarizer protective film having an excellent UV absorbing ability, excellent heat resistance, and excellent optical transparency; a polarizing plate having less defects in an outer appearance using the polarizer protective film and a polarizer; and an image display apparatus of high quality using the polarizing plate. The polarizer protective film of the present invention includes as a main component a (meth) acrylic resin and a UV absorber, in which: a light transmittance at 380 nm of the polarizer protective film is 30% or less when the film has a thickness of 80 ?m; a difference between a Tg of the polarizer protective film and a Tg of the same film as the polarizer protective film except that it does not contain the UV absorber is within 3° C.; and YI at a thickness of 80 ?m is 1.3 or less.

Abstract: Disclosed is a thermoplastic resin composition contains including a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, and at least one kind of metal compound selected from metal salts, metal complexes, and metal oxides, wherein a content of the metal compound in the composition is from 10 to 10,000 ppm in terms of metal atom based on a mass of the methacrylic resin, and a process for producing such a thermoplastic resin composition, the process including carrying out, when preparing a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, cyclization condensation reaction using a catalyst to form the ring structure; and then adding a deactivator of the catalyst.

Abstract: The lactone ring-containing polymer of the present invention meets the following conditions that: (1) the content of polymer gels of 50 ?m or greater in average particle diameter is lower than or equal to 100 pieces/100 g, and the weight average molecular weight of the polymer is 50,000 to 170,000; and/or (2) an increasing rate of viscosity after heated at 280° C. for 30 minutes is 2.0 times or smaller. The lactone ring-containing polymer of the present invention contains very few foreign matters and does not easily cause gelation, in addition to being excellent in transparency and heat resistance as well as having the desired properties such as mechanical strength and forming and processing properties. The forming material obtained by heating and granulating such a polymer are suitable for use in, for example, optical components such as light guide materials, optical lenses, and optical films.

Abstract: The present invention provides a biodegradable film which hardly pollutes the environment even when being discarded, and is excellent in transparency while satisfing adequate flexibility required in a film, and a process for producing a biodegradable film excellent in transparency. The transparent biodegradable film obtained from a resin component containing a polyethylene succinate-based polymer as an essential component, wherein a ratio of the polyethylene succinate-based polymer occupied in the resin composition is 30 to 100% by mass, and a relationship between a haze value and a film thickness satisfies the following inequality (1). H/T<0.

Abstract: The present invention provides a packaging material including a biodegradable packaging material for suppressing scattering of an article to be packaged which has a volatile substance and/or a smell. Specifically, the invention provides a packaging material for packaging a volatile substance and/or a smell generating substance, and the packaging material has a layer including a biodegradable resin material containing 30 to 100% by weight of a polyethylene succinate-based polymer.

Abstract: The present invention provides a (meth)acrylic molding material comprising (A) a (meth)acrylic polymer obtained by polymerization of monomer components essentially containing a monomer having (a) carboxyl group(s) and an alkyl (meth)acrylate monomer, and (B) one or more kinds of monomers containing a vinyl group, wherein 30-600 parts by weight of aluminum hydroxide and 0.01-10 parts by weight of a succinic acid derivative are added for 100 parts by weight of the total of said polymer (A) and monomer (B). The (meth)acrylic molding material is thickened by aluminum hydroxide and the thickening behavior is controlled by the succinic acid derivative to prevent the viscosity from increasing with time, accordingly, the (meth)acrylic molding material shows good workability.