Abstract: A method for producing purified fine polymer particles (A), includes an organic solvent mixing step of mixing an organic solvent (B) and a latex that contains fine polymer particles (A) and an emulsifying agent having a polyethylene group to obtain a mixture, and a mixed state maintaining step of allowing the mixture to stand and/or stirring the mixture. The method can efficiently purify fine polymer particles from a latex and has reduced environmental impact.

Abstract: A resin composition contains polymer particles (A) and a matrix resin (B) such that the polymer particles (A) have a graft part having a glass transition temperature of ?25° C. to 18° C. The resin composition has excellent handleability.

Abstract: A powdery and/or granular material which achieves excellent dispersibility of fine polymer particles in a matrix resin is provided. The powdery and/or granular material contains specific fine polymer particles (A) and a specific resin (B), and has pores with an average pore diameter of 0.03 ?m to 1.00 ?m, where a total volume of the pores is not less than 0.0600 mL/g.

Abstract: An adhesive agent that is favorable in terms of peeling form, adhesive strength, and viscosity is provided. The adhesive agent contains an epoxy resin (A), fine polymer particles (B), and a non-crosslinked acrylic resin (C). With respect to 100 parts by mass of the epoxy resin (A), 1 part by mass to 100 parts by mass of fine polymer particles (B) and 1 part by mass to 100 parts by mass of a non-crosslinked acrylic resin (C) are contained in the adhesive agent. The fine polymer particles (B) contain a rubber-containing graft copolymer that includes (i) an elastic body containing a specific material and (ii) a graft part containing a specific material.

Abstract: A powdery and/or granular material for a thermosetting resin is provided. The powdery and/or granular material contains fine polymer particles (A) that contain a rubber-containing graft copolymer that includes an elastic body and a graft part grafted to the elastic body. The fine polymer particles (A) have a volume-average particle size of not less than 90 nm; and the polymer of the graft part has a weight-average molecular weight of not more than 200000.

Abstract: The present disclosure relates to a novel resin composition which imposes a reduced environmental load and which is excellent in dispersibility of fine polymer particles. Provided is a resin composition containing water, fine polymer particles (A) having a specific feature, and a thermosetting resin (B) having a specific feature. The resin composition contains the water, the fine polymer particles (A), and the thermosetting resin (B) in respective specific amounts, does not substantially contain an organic solvent, and contains sulfur (S) in an amount falling within a specific range and phosphorus (P) in an amount falling within a specific range.

Abstract: A powdery and/or granular material for thermosetting resin that is capable of being well dispersed in a thermosetting matrix resin is provided. The powdery and/or granular material for thermosetting resin may include fine polymer particles (A) having a polymer grafted therein, the polymer containing at least one type of monomer unit selected from the group consisting of aromatic vinyl monomers, vinyl cyanide monomers, and (meth)acrylate monomers, and a resin (B) having a specific viscosity such that the ratio between the fine polymer particles (A) and the resin (B) is a specific ratio.

Abstract: An object of the present invention is to provide an optical resin material and an optical film, which are very small in both orientation birefringence and photoelastic birefringence, excellent in transparency, have few defects due to foreign substances, and are excellent in heat resistance and mechanical strength. Provided is an optical resin material containing a graft copolymer (C) obtained by polymerizing a vinyl-based monomer mixture (B) in the presence of a vinyl-based polymer (A) having at least one crosslinked structure layer, wherein the graft copolymer (C) has an orientation birefringence of ?15×10?4 to 15×10?4 and a photoelastic constant of ?10×10?12 to 10×10?12 Pa?1.

Abstract: An object of the present invention is to provide a resin material capable of producing a molded body having few defects due to foreign substances, having high mechanical strength, very small in both orientation birefringence and photoelastic birefringence, and having high transparency, and having high transparency even when such a resin material is stretched. Provided is a resin composition containing a resin (A) and a multilayer structure polymer (B), wherein the multilayer structure polymer (B) has a crosslinked polymer layer and a hard polymer layer, and the hard polymer layer has at least two different hard polymer layers, at least one of which is a hard polymer layer (C) opposite in sign of a photoelastic constant to that of the resin (A).

Abstract: A resin composition includes an acrylic resin and a graft copolymer having a gel content of 65% to 84%, wherein the graft copolymer is a multistage-polymerized graft copolymer obtained by a multistage polymerization including the polymerization stages (I) to (III). In the polymerization stage (I), a first monomer mixture and a polyfunctional monomer are polymerized in a presence of a primary alkyl mercaptan-based chain transfer agent and/or a secondary alkyl mercaptan-based chain transfer agent to obtain a first hard polymer. In the polymerization stage (II), a second monomer mixture and a polyfunctional monomer are polymerized to obtain a soft polymer. In the polymerization stage (III), a third monomer mixture and a polyfunctional monomer are polymerized to obtain a second hard polymer.

Abstract: An object of the present invention is to provide an optical thermoplastic resin having excellent transparency and color tone, and also excellent heat stability, as well as being extremely low in both orientation birefringence and photoelastic birefringence; and a formed body made of said resin. This optical thermoplastic resin has a rate of reduction in melt viscosity of less than 20%, an orientation birefringence of ?1.7×10?4 to 1.7×10?4, a photoelastic constant of ?2×10?12 to 2×10?12 Pa?1, and, when formed into a 2 mm-thick formed body, has a haze of 1% or less.

Abstract: Disclosed herein is a non-birefringent resin material that is very small in both orientation birefringence and photoelastic birefringence, has high transparency, and is capable of providing a molded article having few foreign matter defects and a film made of such a material. The non-birefringent resin material contains a resin (A) and a polymer (B) and has an orientation birefringence of ?1.7×10?4 to 1.7×10?4 and a photoelastic constant of ?4×10?12 to 4×10?12 Pa?1.

Abstract: A resin composition includes an acrylic resin and a graft copolymer having a gel content of 65% to 84%, wherein the graft copolymer is a multistage-polymerized graft copolymer obtained by a multistage polymerization including the polymerization stages (I) to (III). In the polymerization stage (I), a first monomer mixture and a polyfunctional monomer are polymerized in a presence of a primary alkyl mercaptan-based chain transfer agent and/or a secondary alkyl mercaptan-based chain transfer agent to obtain a first hard polymer. In the polymerization stage (II), a second monomer mixture and a polyfunctional monomer are poloymerized to obtain a soft polymer. In the polymerization stage (III), a third monomer mixture and a polyfunctional monomer are polymerized to obtain a second hard polymer.

Abstract: An optical thermoplastic resin has a rate of reduction in melt viscosity of less than 20%, an orientation birefringence of ?1.7×10?4 to 1.7×10?4, a photoelastic constant of ?3.7×10?12 to 3.7×10?12 Pa?1, and, when formed into a 2 mm-thick formed body, has a haze of 1% or less.

Abstract: An object of the present invention is to provide a resin material capable of producing a molded body having few defects due to foreign substances, having high mechanical strength, very small in both orientation birefringence and photoelastic birefringence, and having high transparency, and having high transparency even when such a resin material is stretched. Provided is a resin composition containing a resin (A) and a multilayer structure polymer (B), wherein the multilayer structure polymer (B) has a crosslinked polymer layer and a hard polymer layer, and the hard polymer layer has at least two different hard polymer layers, at least one of which is a hard polymer layer (C) opposite in sign of a photoelastic constant to that of the resin (A).

Abstract: The present invention aims to provide a moisture-curable reactive hot-melt adhesive composition which contains no vinyl chloride resin, which is excellent in adhesion to oily steel sheets and electroplated steel sheets, which has high strength immediately after application to effectively improve the production cycle, and which can be suitably used in vehicle applications. This challenge is solved by a moisture-curable reactive hot-melt adhesive that includes an oxyalkylene polymer containing a reactive silyl group, an alkyl (meth)acrylate (co)polymer, a tackifying resin, and a specific inorganic filler in combination.

Abstract: An object of the present invention is to provide an optical resin material and an optical film, which are very small in both orientation birefringence and photoelastic birefringence, excellent in transparency, have few defects due to foreign substances, and are excellent in heat resistance and mechanical strength. Provided is an optical resin material containing a graft copolymer (C) obtained by polymerizing a vinyl-based monomer mixture (B) in the presence of a vinyl-based polymer (A) having at least one crosslinked structure layer, wherein the graft copolymer (C) has an orientation birefringence of ?15×10?4 to 15×10?4 and a photoelastic constant of ?10×10?12 to 10×10?12 Pa?1.

Abstract: Disclosed herein is a non-birefringent resin material that is very small in both orientation birefringence and photoelastic birefringence, has high transparency, and is capable of providing a molded article having few foreign matter defects and a film made of such a material. The non-birefringent resin material contains a resin (A) and a polymer (B) and has an orientation birefringence of ?1.7×10?4 to 1.7×10?4 and a photoelastic constant of ?4×10?12 to 4×10?12 Pa?1.

Abstract: The present invention aims to provide a moisture-curable reactive hot-melt adhesive composition which contains no vinyl chloride resin, which is excellent in adhesion to oily steel sheets and electroplated steel sheets, which has high strength immediately after application to effectively improve the production cycle, and which can be suitably used in vehicle applications. This challenge is solved by a moisture-curable reactive hot-melt adhesive that includes an oxyalkylene polymer containing a reactive silyl group, an alkyl (meth)acrylate (co)polymer, a tackifying resin, and a specific inorganic filler in combination.