Abstract:
An ionizing radiation-resistant carbonate resin composition comprising 100 parts by weight of a carbonate resin and 0.1-10 parts by weight of an organic compound having in its molecule an unsaturated carbon-carbon double bond which forms a non-bonding orbital. The composition is useful as the material of medical parts which undergo little deterioration in color tone and various properties even when irradiated with an ionizing radiation for sterilization.
Abstract:
A process for producing copolymer latex by the emulsion polymerization of an aliphatic conjugated diene monomer and another monomer copolymerizable therewith in the presence of a cyclic unsaturated hydrocarbon having one unsaturated bond in the ring, characterized in that the addition of a monomer mixture containing the diene monomer is followed by the addition of another monomer mixture free from the diene monomer, or that part of a chain transfer agent is added after the addition of the monomers. The obtained latex is useful as an adhesive composition, paper coating composition, carpet backing adhesive composition, rock fiber base adhesive composition, gravure paper coating composition, color developing agent composition for pressure-sensitive paper, and the like.
Abstract:
The present invention provides a light diffusing thermoplastic resin composition comprising polycaprolactone, specific silicone rubber particles, and, when desired, a fluorescent brightening agent, an antioxidant and/or an ultraviolet light absorber. A light diffusion sheet can be obtained by molding the light diffusing thermoplastic resin composition, which has superior light diffusion properties, luminance, mechanical strength, thermal stability and light resistance
Abstract:
A polycarbonate resin film, which is prepared by molding a resin composition, which comprises 100 parts by weight of a polycarbonate resin (A), 0.10 to 0.18 parts by weight of an alkali metal or alkaline earth metal salt compound (B) of a perfluoroalkane sulfonic acid and 0.05 to 0.35 parts by weight of a silicone compound (C), wherein a main chain of the silicone compound (C) is branched and the film has: (1) an average thickness of 200 to 500 μm, (2) a degree of haze of 5% or lower as measured according to the conditions specified in JIS K7105, and (3) a flame retardance of VTM-1 or VTM-O at a thickness of 300 μm as measured according to the UL94 test specified by the Underwriters Laboratories (UL). The polycarbonate resin film of the present invention exhibits excellent flame retardance without using a flame retarding agent comprising a halogen or phosphorus and has extremely excellent environmental compatibility with no concern for generating a halogen containing gas during combustion. In addition the film has a high degree of clarity and contributes to make the assembly work more efficient, for example, by shortening the time requirement when the film is utilized as an electrical insulating film.
Abstract:
A flame retardant polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin (A), 0.01 to 3 parts by weight of silsesquioxane (B), 0.005 to 1.0 part by weight of an organic metal salt compound (C) and 0.01 to 3 parts by weight of a fibril- forming type fluorinated polymer (D), wherein said silsesquioxane (B) is characterized by a specific structure (a triangular cone shape). The flame retardant polycarbonate resin composition of the present invention can achieve a high degree of flame retardance even in thin- walled molded products without generating a gas containing chlorine or bromine during combustion originating from a chlorine type or bromine type flame retardant since said flame retardant is not used. Therefore, the flame retardant polycarbonate resin composition of the present invention can ideally be used in housings and parts for electrical, electronic, ITE and the like products, and its industrial utility value is extremely high.
Abstract:
A method of producing a polymeric latex by emulsifying and polymerizing a polymeric monomer, being characterized in that polymerization is performed by using a polymerizing tank, the polymerizing tank being in turn characterized in that: a stirring shaft (1) adapted to be rotated from the outside of the polymerizing tank is disposed in the central portion of the tank; that a bottom paddle (2) is mounted on the shaft (1), the bottom paddle having a sweep-back angle alpha of 30 to 60 DEG at the leading end thereof arranged at a tank bottom portion with the lower end portion thereof close to the bottom wall surface of a stirring tank, that a flat paddle (3) is mounted on the stirring shaft (1) at a portion above the bottom paddle (2), the flat paddle having a crossed axes angle beta of 40 to 100 DEG relative to the bottom paddle (2) and having a plate-like fin (4) extending downwardly at the leading end thereof, and that a plurality of baffle plates (5) each extending in the axial direction along the sidewall surface of the stirring tank from the lower to upper portion thereof are disposed at certain intervals. This method makes it possible to remarkably reduce the amount of fine solidified substances.
Abstract:
A thermoplastic resin composition containing glass fibers, which is excellent in the balance between processability and tapping strength and in the thermal resistance, comprises: A) 10-60 wt.% of a terpolymer composed of N-phenylmaleimide, styrene and acrylonitrile, B) 5-20 wt.% of a graft polymer prepared by grafting styrene and acrylonitrile onto at least one rubber selected from among a conjugated diene rubber, an ethylene/propylene rubber and an ethylene/butylene rubber, C) 10-80 wt.% of a copolymer composed of styrene and acrylonitrile, and D) 5-35 wt.% of glass fibers, and satisfies the following conditions: a) the terpolymer has an intrinsic viscosity of 0.20 to 0.70, b) the copolymer has an intrinsic viscosity of 0.40 to 1.00, c) the intrinsic viscosity of the terpolymer is less than or equal to that of the copolymer, and d) the styrene content of the copolymer minus that of the terpolymer ranges from +20 to -5.