Abstract: A fluororesin including a residue unit of formula (1) and having a haze value equal to 2% or less of a heat-press molded product (thickness 1 mm) with a small haze value of a melt-molded product and a method for producing the same, Rf1, Rf2, Rf3 and Rf4 each independently represent one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, and a cyclic perfluoroalkyl group having 3 to 7 carbon atoms, the perfluoroalkyl group may have an ethereal oxygen atom, Rf1, Rf2, Rf3 and Rf4 may be linked to each other to form a ring having 4 or more and 8 or less carbon atoms, and the ring may include an ethereal oxygen atom.

Abstract: The present invention relates to resin particles including a residue unit represented by the following general formula (1) and having a volume average particle diameter equal to or more than 5 ?m and equal to or less than 2008 ?m, and a method for producing thereof. Fruthermore the present invention relates to a fluororesin comprising a residue unit represented by a general formula (1) and having a weight average molecular weight Mw in a range of 5×104 to 3×105, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280° C. of equal to or less than 6, and a method for producing thereof. In the formula (1), Rf1, Rf2, Rf3, and Rf4 are each independently one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, or a cyclic perfluoroalkyl group having 3 to 7 carbon atoms. The perfluoroalkyl group may have an ethereal oxygen atom.

Abstract: The present invention relates to resin particles including a residue unit represented by the following general formula (1) and having a volume average particle diameter equal to or more than 5 ?m and equal to or less than 2000 ?m, and a method for producing thereof. Furthermore the present invention relates to a fluororesin comprising a residue unit represented by a general formula (1) and having a weight average molecular weight Mw in a range of 5×104 to 3×105, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280° C. of equal to or less than 6, and a method for producing thereof. In the formula (1), Rf1, Rf2, Rf3, and Rf4 are each independently one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, or a cyclic perfluoroalkyl group having 3 to 7 carbon atoms. The perfluoroalkyl group may have an ethereal oxygen atom.

Abstract: The present invention relates to resin particles including a residue unit represented by the following general formula (1) and having a volume average particle diameter equal to or more than 5 ?m and equal to or less than 2000 ?m, and a method for producing thereof. Furthermore the present invention relates to a fluororesin comprising a residue unit represented by a general formula (1) and having a weight average molecular weight Mw in a range of 5×104 to 3×105, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280° C. of equal to or less than 6, and a method for producing thereof. In the formula (1), Rf1, Rf2, Rf3, and Rf4 are each independently one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, or a cyclic perfluoroalkyl group having 3 to 7 carbon atoms. The perfluoroalkyl group may have an ethereal oxygen atom.

Abstract: The present invention relates to resin particles including a residue unit represented by the following general formula (1) and having a volume average particle diameter equal to or more than 5 ?m and equal to or less than 2000 ?m, and a method for producing thereof. Furthermore the present invention relates to a fluororesin comprising a residue unit represented by a general formula (1) and having a weight average molecular weight Mw in a range of 5×104 to 3×105, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280° C. of equal to or less than 6, and a method for producing thereof. In the formula (1), Rf1, Rf2, Rf3, and Rf4 are each independently one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, or a cyclic perfluoroalkyl group having 3 to 7 carbon atoms. The perfluoroalkyl group may have an ethereal oxygen atom.

Abstract: The present invention relates to a fluororesin including a residue unit represented by a following general formula (1) and having a haze value equal to or less than 2% of a heat-press molded product (thickness 1 mm) with a small haze value of a melt-molded product and a method for producing the same. In the formula (1), Rf1, Rf2, Rf3 and Rf4 each independently represent one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, and a cyclic perfluoroalkyl group having 3 to 7 carbon atoms, the perfluoroalkyl group may have an ethereal oxygen atom, Rf1, Rf2, Rf3 and Rf4 may be linked to each other to form a ring having 4 or more and 8 or less carbon atoms, and the ring may include an ethereal oxygen atom. The present invention further relates to a method for producing fluororesin particles that each include a fluorine-containing aliphatic ring structure.

Abstract: Optical compensation layers are provided which have an optically compensating function imparted thereto upon coating fluid application or upon coating fluid application and subsequent uniaxial stretching and which have a small wavelength dependence of retardation.

Abstract: To provide a retardation film and an optical compensation film which have excellent optical properties and are useful as a compensation film for compensating the contrast and viewing-angle characteristics of liquid-crystal displays and as an antireflection film.

Abstract: A novel fumaric diester copolymer suitable for used in an optical material having excellent heat resistance and transparency is provided. The fumaric diester copolymer comprises a specific fumaric diester residue, and at least one (meth)acrylic ester residue unit selected from a specific (meth)acrylic ester residue unit having an oxetanyl group and a specific (meth)acrylic ester residue unit having a tetrahydrofurfuryl group, and has a number average molecular weight of from 1,000 to 500,000.

Abstract: Optical compensation layers are provided which have an optically compensating function imparted thereto upon coating fluid application or upon coating fluid application and subsequent uniaxial stretching and which have a small wavelength dependence of retardation.

Abstract: To provide a retardation film and an optical compensation film which have excellent optical properties and are useful as a compensation film for compensating the contrast and viewing-angle characteristics of liquid-crystal displays and as an antireflection film.

Abstract: A novel fumaric diester copolymer suitable for used in an optical material having excellent heat resistance and transparency is provided. The fumaric diester copolymer comprises a specific fumaric diester residue, and at least one (meth)acrylic ester residue unit selected from a specific (meth)acrylic ester residue unit having an oxetanyl group and a specific (meth)acrylic ester residue unit having a tetrahydrofurfuryl group, and has a number average molecular weight of from 1,000 to 500,000.

Abstract: A plastic substrate for display, having little coloration and excellent in optical characteristics, heat resistance, resistance to thermal coloration and mechanical properties, and a display element using the same are provided. The plastic substrate for display comprises a fumaric acid diester resin which comprises 60 mol % or more of a fumaric acid diester residue unit represented by the following formula (1): wherein R1 and R2 each independently represent a branched alkyl group or a cyclic alkyl group, having 3–12 carbon atoms, and has a number average molecular weight of 1,000–500,000 as determined by a gel permeation chromatography and converted into standard polystyrene, the substrate having a thickness 30–600 ?m.

Abstract: The present invention provides a method of preparation of optical compensation films using a polymer stabilization technique so as to enable continuous roll-to-roll production. The films can be applied for reflective liquid crystal displays. They are prepared by photo-polymerizing a mixture comprising a reactive monomer (or mixture of monomers), a small amount of photoinitiator and liquid crystal. The concentration of the reactive monomer (mesogenic or non-mesogenic) in the reactive mixtures can be as low as 5% or as high as 99% by weight. The materials that can function as the optical compensation films in the present invention include, but are not limited to, mixtures of liquid crystal and reactive mesogenic monomers (rod-like, bent-shaped, and disc-like mesogenic monomers) containing polymerizable groups (monofunctionaly or multifunctional) selected from acrylate, methacrylate, vinyls, butadiene, vinyl ethers, or epoxide.

Abstract: A plastic substrate for display, having little coloration and excellent in optical characteristics, heat resistance, resistance to thermal coloration and mechanical properties, and a display element using the same are provided. The plastic substrate for display comprises a fumaric acid diester resin which comprises 60 mol % or more of a fumaric acid diester residue unit represented by the following formula (1): wherein R1 and R2 each independently represent a branched alkyl group or a cyclic alkyl group, having 3-12 carbon atoms, and has a number average molecular weight of 1,000-500,000 as determined by a gel permeation chromatography and converted into standard polystyrene, the substrate having a thickness 30-600 ?m.

Abstract: The present invention provides a method of preparation of optical compensation films using a polymer stabilization technique so as to enable continuous roll-to-roll production. The films can be applied for reflective liquid crystal displays. They are prepared by photo-polymerizing a mixture comprising a reactive monomer (or mixture of monomers), a small amount of photoinitiator and liquid crystal. The concentration of the reactive monomer (mesogenic or non-mesogenic) in the reactive mixtures can be as low as 5% or as high as 99% by weight. The materials that can function as the optical compensation films in the present invention include, but are not limited to, mixtures of liquid crystal and reactive mesogenic monomers (rod-like, bent-shaped, and disc-like mesogenic monomers) containing polymerizable groups (monofunctionaly or multifunctional) selected from acrylate, methacrylate, vinyls, butadiene, vinyl ethers, or epoxide.

Abstract: A process for producing a succinimide resin composition is provided which comprises reacting a maleic anhydride-olefin type copolymer constituted of 40-60 mol % of maleic anhydride units, 60-40 mol % of olefin units, and 0-20 mol % of a copolymerizable monomer units with one or more amine compounds for imide formation in the presence of a second polymer other than the succinimide resin. This process improves the productivity by lowering the torque in the extrusion reaction, giving a succinimide copolymer resin composition having low yellowness and high transparency with high production efficiency.

Abstract: A process for producing a succinimide resin composition is provided which comprises reacting a maleic anhydride-olefin type copolymer constituted of 40-60 mol % of maleic anhydride units, 60-40 mol % of olefin units, and 0-20 mol % of a copolymerizable monomer units with one or more amine compounds for imide formation in the presence of a second polymer other than the succinimide resin. This process improves the productivity by lowering the torque in the extrusion reaction, giving a succinimide copolymer resin composition having low yellowness and high transparency with high production efficiency.

Abstract: There is disclosed a resin composition comprising about 99-1% by weight of a vinyl chloride resin and about 1-99% by weight of a copolymer of about 30-70 mol % N-substituted maleimide structural unit and about 70-30 mol % olefinic structural unit. The composition has excellent forming and molding properties and provides formed or molded products of improved heat resistance and mechanical properties.

Abstract: Disclosed is a laminate comprising N-alkyl-substituted maleimide-olefin type copolymer and aromatic polycarbonate, wherein the thickness of N-alkyl-substituted maleimide-olefin type copolymer layer x and the thickness of aromatic polycarbonate layer y in the laminate satisfy the following formula.0.4<x/(x+y)<0.98A laminate with excellent transparency, heat resistance, strength and rigidity that improves low impact resistance having been a drawback of N-alkyl-substituted maleimide-olefin type copolymers is provided.