Abstract: Disclosed is a resin composition for an optical material which contains a base polymer (A), a photopolymerizable compound (B), and a photopolymerization initiator (C). Also disclosed is a resin film for an optical material which is made of such a resin composition for an optical material. Specifically disclosed is a resin composition for an optical material which has high transparency and high heat resistance, while enabling formation of a thick film with high precision. This resin composition is particularly useful for a resin film which is used for forming optical waveguides. Also specifically disclosed are a resin film for an optical material using such a resin composition and an optical waveguide using such a resin film.

Abstract: The present invention relates to a resin composition for an optical waveguide comprising (A) a photopolymerizable monomer, (B) a binder polymer and (C) a photoinitiator, wherein the photopolymerizable monomer (A) contains a hydroxyl group-containing fluorinated mono(meth)acrylate base compound. Provided are a resin composition for an optical waveguide which has a high transparency in a wavelength of 1.3 ?m and which is excellent in formation of a thick film and an adhesive property and an optical waveguide prepared by using the same.

Abstract: A resin composition for an optical material, which is excellent in heat resistance and transparency and is soluble in an aqueous alkali solution, a resin film for an optical material made of the resin composition, and an optical waveguide using the same are provided. The resin composition for an optical material includes: (A) an alkali-soluble (meth)acrylate polymer containing a maleimide skeleton in a main chain; (B) a polymerizable compound; and (C) a polymerization initiator. The resin film for an optical material is made of the resin composition for an optical material. The optical waveguide has a core part and/or a clad layer formed using the resin composition for an optical material or the resin film for an optical material.

Abstract: Disclosed is a resin composition for an optical material which contains a base polymer (A), a photopolymerizable compound (B), and a photopolymerization initiator (C). Also disclosed is a resin film for an optical material which is made of such a resin composition for an optical material. Specifically disclosed is a resin composition for an optical material which has high transparency and high heat resistance, while enabling formation of a thick film with high precision. This resin composition is particularly useful for a resin film which is used for forming optical waveguides. Also specifically disclosed are a resin film for an optical material using such a resin composition and an optical waveguide using such a resin film.

Abstract: A resin composition for an optical material, which is excellent in heat resistance and transparency and is soluble in an aqueous alkali solution, a resin film for an optical material made of the resin composition, and an optical waveguide using the same are provided. The resin composition for an optical material includes: (A) an alkali-soluble (meth)acrylate polymer containing a maleimide skeleton in a main chain; (B) a polymerizable compound; and (C) a polymerization initiator. The resin film for an optical material is made of the resin composition for an optical material. The optical waveguide has a core part and/or a clad layer formed using the resin composition for an optical material or the resin film for an optical material.

Abstract: The present invention relates to a process for producing an optical waveguide, including the steps of applying a cladding layer-forming resin onto a substrate and curing the resin to form a lower cladding layer; laminating a core layer-forming resin film on the lower cladding layer to form a core layer; subjecting the core layer to exposure to light and development to form a core pattern; and applying a cladding layer-forming resin over the core pattern to embed the core pattern therebeneath, and curing the resin to form an upper cladding layer, wherein the step of forming the core layer includes the steps of (1) allowing the core layer-forming resin film to be temporarily attached onto the lower cladding layer using a roll laminator, and (2) thermocompression-bonding the temporarily attached core layer-forming resin film onto the lower cladding layer under a reduced pressure. There is provided the process for producing an optical waveguide having a uniform core with a good productivity.

Abstract: The present invention relates to a resin composition for an optical material comprising (A) a carboxylic acid-modified phenoxy resin, (B) a polymerizable compound and (C) a polymerization initiator, a resin film for an optical material comprising the above resin composition and an optical waveguide having a core part and/or a cladding layer formed by using the same. Provided are a resin composition for an optical material which is excellent in a heat resistance and a transparency and which is soluble in an alkaline aqueous solution, a resin film for an optical material comprising the above resin composition and an optical waveguide produced by using the same.

Abstract: The present invention relates to a flexible optical waveguide including a core portion and a cladding layer which has an increment of insertion loss of 0.1 dB or less upon subjecting the waveguide to a 360° bending test at a radius of curvature of 2 mm, as well as an optical module using the flexible optical waveguide. There are provided a flexible optical waveguide having high flexing property, heat resistance and transparency, as well as an optical module using the flexible optical waveguide.

Abstract: A resin composition for an optical material, which is excellent in heat resistance and transparency and is soluble in an aqueous alkali solution, a resin film for an optical material made of the resin composition, and an optical waveguide using the same are provided. The resin composition for an optical material includes: (A) an alkali-soluble (meth)acrylate polymer containing a maleimide skeleton in a main chain; (B) a polymerizable compound; and (C) a polymerization initiator. The resin film for an optical material is made of the resin composition for an optical material. The optical waveguide has a core part and/or a clad layer formed using the resin composition for an optical material or the resin film for an optical material.

Abstract: The present invention relates to a flexible optical waveguide including a core portion and a cladding layer which has an increment of insertion loss of 0.1 dB or less upon subjecting the waveguide to a 360° bending test at a radius of curvature of 2 mm, as well as an optical module using the flexible optical waveguide. There are provided a flexible optical waveguide having high flexing property, heat resistance and transparency, as well as an optical module using the flexible optical waveguide.

Abstract: The present invention discloses a sulfur-containing phenolic resin which comprises an organic group represented by the following formula (1): —R1—S—R2—S—R1—??(1) wherein R1 represents a hydrocarbon group having 2 to 6 carbon atoms, R2 represents a hydrocarbon group having 1 to 10 carbon atoms, between a phenolic carbon and a phenolic carbon, phenol derivatives represented by the following formula (5): wherein R5 represents a C2-3 alkylene group, R6 represents a C1-10 alkylene group, G represents H, a C1-10 alkyl group, etc., and an epoxy resin composition containing (A) a curing agent of the above-mentioned formula (5) and (B) an epoxy resin as essential components.

Abstract: The present invention relates to a phenoxy resin for an optical material obtained by subjecting at least one selected from specific difunctional epoxy resins and at least one selected from specific difunctional phenols to polyaddition reaction, wherein a film comprising the above phenoxy resin has a refractive index of 1.580 or less at 25° C. and a wavelength of 830 nm, a resin composition for an optical material containing the above phenoxy resin, a resin film for an optical material comprising the above resin composition and an optical waveguide produced by using the above resin composition and/or the above resin film.

Abstract: The present invention discloses a sulfur-containing phenolic resin which comprises an organic group represented by the following formula (1): —R1—S—R2—S—R1—??(1) wherein R1 represents a hydrocarbon group having 2 to 6 carbon atoms, R2 represents a hydrocarbon group having 1 to 10 carbon atoms, between a phenolic carbon and a phenolic carbon, phenol derivatives represented by the following formula (5): wherein R5 represents a C2-3 alkylene group, R6 represents a C1-10 alkylene group, G represents H, a C1-10 alkyl group, etc., and an epoxy resin composition containing (A) a curing agent of the above-mentioned formula (5) and (B) an epoxy resin as essential components.

Abstract: The present invention relates to a flexible optical waveguide prepared by using a resin film for forming an optical waveguide for at least one of a lower cladding layer, a core layer and an upper cladding layer, wherein a ten point average roughness (Rz) on a surface of either one of the lower cladding layer and the upper cladding layer is 0.5 ?m or more and 10 ?m or less, a production process for the same and an optical module prepared by using the flexible optical waveguide. Provided are a flexible optical waveguide which is excellent in an adhesive property in compounding with an electric printed wiring board and turning a flexible optical waveguide into a multilayer, a production process for the same and an optical module prepared by using the flexible optical waveguide.

Abstract: Disclosed is a resin composition for an optical material which contains a base polymer (A), a photopolymerizable compound (B), and a photopolymerization initiator (C). Also disclosed is a resin film for an optical material which is made of such a resin composition for an optical material. Specifically disclosed is a resin composition for an optical material which has high transparency and high heat resistance, while enabling formation of a thick film with high precision. This resin composition is particularly useful for a resin film which is used for forming optical waveguides. Also specifically disclosed are a resin film for an optical material using such a resin composition and an optical waveguide using such a resin film.

Abstract: The present invention discloses a sulfur-containing phenolic resin which comprises an organic group represented by the following formula (1): —R1—S—R2—S—R1—??(1) wherein R1 represents a hydrocarbon group having 2 to 6 carbon atoms, R2 represents a hydrocarbon group having 1 to 10 carbon atoms, between a phenolic carbon and a phenolic carbon, phenol derivatives represented by the following formula (5): wherein R5 represents a C2-3 alkylene group, R6 represents a C1-10 alkylene group, G represents H, a C1-10 alkyl group, etc., and an epoxy resin composition containing (A) a curing agent of the above-mentioned formula (5) and (B) an epoxy resin as essential components.

Abstract: The present invention discloses a sulfur-containing phenolic resin which comprises an organic group represented by the following formula (1): —R1—S—R2—S—R1—??(1) wherein R1 represents a hydrocarbon group having 2 to 6 carbon atoms, R2 represents a hydrocarbon group having 1 to 10 carbon atoms, between a phenolic carbon and a phenolic carbon, phenol derivatives represented by the following formula (5): wherein R5 represents a C2-3 alkylene group, R6 represents a C1-10 alkylene group, G represents H, a C1-10 alkyl group, etc., and an epoxy resin composition containing (A) a curing agent of the above-mentioned formula (5) and (B) an epoxy resin as essential components.

Abstract: The present invention relates to an optical resin comprising a poly(benzoazole) having repeating units represented by the following general formula (1) as a constituent; and an optical waveguide, an optical filter and an optical lens prepared using the optical resin: 1