Abstract: The present invention provides a composite semipermeable membrane achieving high permeate amount and having high capability to inhibit adhesion of foulants to the membrane surface. The present invention relates to a composite semipermeable membrane including: a supporting membrane which includes a substrate and a porous supporting layer; and a polyamide separation functional layer formed on the porous supporting layer, in which an acidic group-containing hydrophilic polymer is introduced onto the surface of the separation functional layer via amide linkage, and relates to a method for producing such a composite semipermeable membrane.

Abstract: Provided is a composite semipermeable membrane having a high salt removal rate and a high water permeability. The composite semipermeable membrane comprises a substrate, a porous support layer formed on the substrate, and a separation functional layer formed on the porous support layer, the hydrophilic macromolecule concentration on the substrate-side surface of the porous support layer being higher than that on the separation functional layer-side surface.

Abstract: To provide a resin composition for sealing an optical semiconductor, which is a raw material for a sealing resin layer having good curability and excellent storage stability; preferably a raw material for a sealing resin layer further having excellent weather resistance. The surface sealant for an optical semiconductor of Embodiment 1 according to the present invention contains epoxy resin (a) having two or more epoxy groups in a molecule, and metal complex (b1) which contains at least one metal ion selected from the group consisting of Zn, Bi, Ca, Al, Cd, La and Zr, a tertiary amine capable of forming a complex with the metal ion and having no N—H bond and an anionic ligand having a molecular weight of 17 to 200, in which the surface sealant has a viscosity of 10 to 10000 mPa·s, as measured by E-type viscometer at 25° C. and 1.0 rpm.

Abstract: To provide a composite semipermeable membrane capable of maintaining high removal performance even after its supporting membrane has come into contact with an aqueous solution high in salt concentration. A composite semipermeable membrane including: a supporting membrane which includes a substrate and a porous supporting layer; and a separation functional layer provided on the porous supporting layer, in which a strength to peel the porous supporting layer away from the substrate is 1.1 N/25 mm or higher.

Abstract: In order to obtain a composite separation membrane which has excellent chemical resistance, separation performance and water permeability at the same time, the present invention provides a composite separation membrane comprising a separation function layer on a porous supporting membrane, characterized in that the separation function layer contains at least a polymer of a polyhedral silsesquioxane represented by the following general formula (a) and a hydrophilic monomer. (R1SiO1.5)n(R2SiO1.5)m ??General Formula (a) (In the formula, R1 includes a polymerizable reactive moiety; R2 represents a hydrogen atom or an alkyl group, which may be substituted; and n and m each represent an integer satisfying n>2 or m>0, with n+m being 8, 10 or 12.

Abstract: The present invention addresses the issue of providing a surface sealing agent which can be cured at low temperatures and which exhibits excellent storage stability. In order to resolve this issue, provided is a surface sealing agent for an organic EL element, the surface sealing agent including an epoxy resin (A) having at least two epoxy groups in a molecule, and a curing accelerator (B) which is a salt of a specific quaternary ammonium ion, wherein 0.1-10 parts by weight of the curing accelerator (B) is contained relative to 100 parts by weight of the surface sealing agent.

Abstract: A composite semipermeable membrane includes: a supporting membrane having a substrate and a porous supporting layer; and a separation functional layer provided on the supporting membrane, in which, when any 10 cross sections of the composite semipermeable membrane, having a length of 2.0 ?m in a membrane surface direction, are observed using an electron microscope, an average number density of projections on the separation functional layer, which have a height equivalent to or higher than ? of a 10-point average surface roughness of the separation functional layer, is 10.0 pieces/?m or more, in each cross section, and an average height of the projections is 100 nm or more.

Abstract: An object of the present invention is to provide a composite semipermeable membrane which has excellent chemical resistance, separation performance, and water permeability, and the composite semipermeable membrane has the following structure. The present invention provides a composite semipermeable membrane in which an separation function layer is formed on a microporous supporting membrane, wherein the separation function layer is formed from (A) a silicon compound in which a reactive group having an ethylenically unsaturated group and a hydrolyzable group are directly bonded to silicon atoms, and (B) a compound having an ethylenically unsaturated group other than the silicon compound, by condensation of the hydrolyzable group of the silicon compound (A) and polymerization of the ethylenically unsaturated group of the silicon compound (A) and the ethylenically unsaturated group of the compound (B) having the ethylenically unsaturated group.

Abstract: To provide a resin composition for sealing an optical semiconductor, which is a raw material for a sealing resin layer having good curability and excellent storage stability; preferably a raw material for a sealing resin layer further having excellent weather resistance. The surface sealant for an optical semiconductor of Embodiment 1 according to the present invention contains epoxy resin (a) having two or more epoxy groups in a molecule, and metal complex (b1) which contains at least one metal ion selected from the group consisting of Zn, Bi, Ca, Al, Cd, La and Zr, a tertiary amine capable of forming a complex with the metal ion and having no N—H bond and an anionic ligand having a molecular weight of 17 to 200, in which the surface sealant has a viscosity of 10 to 10000 mPa·s, as measured by E-type viscometer at 25° C. and 1.0 rpm.

Abstract: An object of the present invention is to provide a composite semipermeable membrane which has excellent chemical resistance, separation performance, and water permeability, and the composite semipermeable membrane has the following structure. The present invention provides a composite semipermeable membrane in which an separation function layer is formed on a microporous supporting membrane, wherein the separation function layer is formed from (A) a silicon compound in which a reactive group having an ethylenically unsaturated group and a hydrolyzable group are directly bonded to silicon atoms, and (B) a compound having an ethylenically unsaturated group other than the silicon compound, by condensation of the hydrolyzable group of the silicon compound (A) and polymerization of the ethylenically unsaturated group of the silicon compound (A) and the ethylenically unsaturated group of the compound (B) having the ethylenically unsaturated group.

Abstract: In order to obtain a composite separation membrane which has excellent chemical resistance, separation performance and water permeability at the same time, the present invention provides a composite separation membrane comprising a separation function layer on a porous supporting membrane, characterized in that the separation function layer contains at least a polymer of a polyhedral silsesquioxane represented by the following general formula (a) and a hydrophilic monomer. (R1SiO1.5)n(R2SiO1.5)m??General Formula (a) (In the formula, R1 includes a polymerizable reactive moiety; R2 represents a hydrogen atom or an alkyl group, which may be substituted; and n and m each represent an integer satisfying n?2 or m?0, with n+m being 8, 10 or 12.

Abstract: An acrylic elastomer composition comprising (A) a halogen-containing acrylic elastomer, (B) a polyvalent carboxylic acid, (C) a quaternary onium salt and (D) a hydrotalcite can be vulcanized within a shorter vulcanization time to give a vulcanization product having distinguished normal state physical properties and compression set characteristics, even without any secondary vulcanization.

Abstract: An acrylic elastomer composition comprising (A) a halogen-containing acrylic elastomer, (B) a polyvalent carboxylic acid, (C) a quaternary onium salt and (D) a hydrotalcite can be vulcanized within a shorter vulcanization time to give a vulcanization product having distinguished normal state physical properties and compression set characteristics, even without any secondary vulcanization.

Abstract: A butenedioic acid monoalkyl ester-copolymerized acrylic elastomer containing 0.1-30% by mole of unreacted butenedioic acid monoalkyl ester on the basis of carboxyl groups copolymerized in the acrylic elastomer or its cross-linkable composition. The cross-linkable composition can give cross-linking products having distinguished vulcanization characteristics and stably showing good compression set characteristics.

Abstract: An acrylic elastomer composition comprising (A) a halogen-containing acrylic elastomer, (B) a polyvalent carboxylic acid, (C) a quaternary onium salt and (D) a hydrotalcite can be vulcanized within a shorter vulcanization time to give a vulcanization product having distinguished normal state physical properties and compression set characteristics, even without any secondary vulcanization.

Abstract: A butenedioic acid monoalkyl ester-copolymerized acrylic elastomer containing 0.1-30% by mole of unreacted butenedioic acid monoalkyl ester on the basis of carboxyl groups copolymerized in the acrylic elastomer or its cross-linkable composition. The cross-linkable composition can give cross-linking products having distinguished vulcanization characteristics and stably showing good compression set characteristics.

Abstract: A butenedioic acid monoalkyl ester-copolymerized acrylic elastomer containing 0.1-30% by mole of unreacted butenedioic acid monoalkyl ester on the basis of carboxyl groups copolymerized in the acrylic elastomer or its cross-linkable composition. The cross-linkable composition can give cross-linking products having distinguished vulcanization characteristics and stably showing good compression set characteristics.

Abstract: A modified acrylic rubber having distinguished molding characteristics and O-ring compression set characteristic is produced by mixing an acrylic rubber having reactive functional groups such as active chlorine groups, carboxylic groups, epoxy groups, active ester groups, etc. with an unsaturated compound reactive with the reactive functional group with heating in the absence of a solvent.

Abstract: A butenedioic acid monoalkyl ester-copolymerized acrylic elastomer containing 0.1-30% by mole of unreacted butenedioic acid monoalkyl ester on the basis of carboxyl groups copolymerized in the acrylic elastomer or its cross-linkable composition. The cross-linkable composition can give cross-linking products having distinguished vulcanization characteristics and stably showing good compression set characteristics.

Abstract: An acrylic elastomer composition, which comprises an acrylic elastomer obtained by copolymerization with 0.1 to 10% by weight of fumaric acid mono-lower alkyl ester on the basis of total monomer mixture, an aromatic diamine compound vulcanizing agent and a guanidine compound vulcanization promoter is distinguished in metal corrosion resistance, oil resistance, compression set characteristics, etc. and is effectively applicable as a vulcanization molding material for seal members or hose members to be used at contact sites with metal members, oil, etc.