Abstract: The present invention aims at providing a composite semipermeable membrane excellent in water permeability and salt-blocking rate, and including an extremely small amount of unreacted polyfunctional amine components in the membrane, and at providing a process for producing the composite semipermeable membrane. A composite semipermeable membrane having a skin layer formed on the surface of a porous support, the skin layer comprising a polyamide resin obtained by interfacial polymerization of a polyfunctional amine component and a polyfunctional acid halide component, wherein the content of an unreacted polyfunctional amine component is 200 mg/m2 or less after formation of the skin layer and before a membrane washing treatment, and the content of the unreacted polyfunctional amine component after the membrane washing treatment is 20 mg/m2 or less.

Abstract: A polarizer used for an image display such as a liquid crystal display, a plasma display, and an electroluminescence display, and the polarizer suppresses coloring of transmitted light. The polarizer includes a polymer film having a difference of 10% or less between the maximum and the minimum of a first transmittance in a wavelength ranging from 400 nm to 700 nm.

Abstract: A polarizer of the invention comprises a polyvinyl alcohol-based film which is at least dyed with at least iodine and uniaxially stretched, having a single transmittance of 43% or more, a polarizing efficiency of 99.9% or more, and a dichroic ratio of 30 or more, wherein the dichroic ratio is calculated from a parallel transmittance (Tp) and a crossed transmittance (Tc) at a wavelength of 440 nm, and have good hue.

Abstract: The present invention provides a medical adhesive composition containing a copolymer obtained by copolymerization of a monomer mixture containing an acrylic acid alkyl ester having C4-C12 alkyl group, a (meth)acrylic acid, and a methacrylic acid alkyl ester having C1-C4 alkyl group, which mixture is free of a multifunctional monomer having two or more unsaturated double bonds in a molecule, wherein the copolymer has a gel-sol ratio of 35:65 to 55:45 and a weight average molecular weight of the sol portion of 300,000 to 500,000, or a copolymer obtained by copolymerization of the above-mentioned monomer mixture and having a gel fraction of 35 to 55% and a swelling ratio of a gel portion of 50 to 90 times. The medical adhesive of the present invention is superior in the balance between adhesiveness and cohesiveness and can be preferably used for various medical adhesive tapes or sheets.

Abstract: The present invention provides a polarizer used for an image display such as a liquid crystal display, a plasma display, and an electroluminescence display, and the polarizer suppresses coloring of transmitted light. The polarizer includes a polymer film having a difference of 10% or less between the maximum and the minimum of a first transmittance in a wavelength ranging from 400 nm to 700 nm.

Abstract: The present invention provides a medical adhesive composition containing a copolymer obtained by copolymerization of a monomer mixture containing an acrylic acid alkyl ester having C4-C12 alkyl group, a (meth)acrylic acid, and a methacrylic acid alkyl ester having C1-C4 alkyl group, which mixture is free of a multifunctional monomer having two or more unsaturated double bonds in a molecule, wherein the copolymer has a gel-sol ratio of 35:65 to 55:45 and a weight average molecular weight of the sol portion of 300,000 to 500,000, or a copolymer obtained by copolymerization of the above-mentioned monomer mixture and having a gel fraction of 35 to 55% and a swelling ratio of a gel portion of 50 to 90 times. The medical adhesive of the present invention is superior in the balance between adhesiveness and cohesiveness and can be preferably used for various medical adhesive tapes or sheets.