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公开(公告)号：JPH0249088A
公开(公告)日：1990-02-19
申请号：JP20034788
申请日：1988-08-11
Applicant: SHOWA DENKO KK
Inventor： TAGOSHI HIROTAKA , YOSHIDA HARUO , ABE KAZUTO , ARAKAWA TSUTOMU , MINORIKAWA NAOKI , MARUYAMA SATOSHI
Abstract: PURPOSE:To obtain a curable composition, containing 3,3'-divinylbiphenyl as one component and capable of providing optical materials, coating agents, sealing media, etc., having a high refractive index and excellent in curability heat resistance, low water absorbability and optical homogeneity. CONSTITUTION:The objective composition consisting of (A) 10-90wt.% polymerizable monomer consisting of 3,3'-divinylbiphenyl expressed by the formula and (B) 90-10wt.% other vinylic monomers [e.g. unsaturated fatty acid ester, aromatic vinyl compound, unsaturated fatty acid (derivative), unsaturated dibasic acid (derivative) or vinyl cyanide compound, such as (meth)acrylonitrile] copolymerizable with the component (A). Furthermore, the component (A) is synthesized by a method for, e.g. reacting a 3-halogenostyrene with metallic magnesium in an ethereal solvent, such as tetrahydrofuran, to prepare an active organomagnesium compound and reacting the resultant compound with an Ni complex catalyst, such as Ni(Cl2)(bpy).
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公开(公告)号：JPH01201316A
公开(公告)日：1989-08-14
申请号：JP2477288
申请日：1988-02-03
Applicant: SHOWA DENKO KK
Inventor： MARUYAMA SATOSHI , MINORIKAWA NAOKI , OTAKE ISAO , ARAKAWA TSUTOMU
IPC: C08F299/00 , C08F290/00
Abstract: PURPOSE:To form an optical material possessing properties such as optical homogeneity, low water absorptivity, heat resistance and abrasion resistance, by using a polymer of a specified alicyclic (meth)allyl carbonate compound or a copolymer of said compound with another compound copolymerizable therewith as the raw material. CONSTITUTION:This optical material is formed from a polymer of at least one compound of formula I or a copolymer of this compound with another compound copolymerizable therewith. In formula I, R1 and R2 are the same or different, and are each a hydrogen atom or a methyl group, l is an integer of 1-3, m and n are integers of 0-8, and the sum of m and n is in the range of 0
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公开(公告)号：JPH01171914A
公开(公告)日：1989-07-06
申请号：JP33014787
申请日：1987-12-28
Applicant: SHOWA DENKO KK
Inventor： ARAKAWA TSUTOMU , MINORIKAWA NAOKI , MARUYAMA SATOSHI
Abstract: PURPOSE:To manufacture a plastic lens of a favorable quality at a favorable yield by eliminating generating of surface contamination or annular irregularities of a molding and preventing mold release during polymerization, by a method wherein thermal polymerization is performed under water where the density of dissolved oxygen is specific or below at least until a stage where gelation begins by polymerizing a raw material monomer. CONSTITUTION:Thermal polymerization is performed under water where density of dissolved oxygen is 5ppm or lower at least until a stage where gelation begins by polymerizing a raw material monomer, in a method manufacturing a plastic lens by polymerizing thermally by casting the raw material monomer into an air gap of two matrices arranged in a confronting state. Thermal polymerization of the usable raw materials suffers form oxygen regardless of a degree of the same and, for example, an aryl compound or its pre-reactant, an allylidene compound or its pre-reactant and (meth)acrylate compound or its pre-reactant are available. In addition, the raw material monomer is used by adding 0.001-10 pts.wt. radical polymerization initiator per 100 pts.wt. raw material monomer.
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公开(公告)号：JPS62111706A
公开(公告)日：1987-05-22
申请号：JP25318685
申请日：1985-11-12
Applicant: SHOWA DENKO KK
Inventor： WASHIYAMA JUNICHIRO , MINORIKAWA NAOKI , SAEDA SHIGERU
Abstract: PURPOSE:To improve production efficiency by shortening the molding cycle of a disk along with molding of a foamless optical information recording disk, by a method wherein the inside of a cavity of a mold is evacuated, a crosslinking type curing resin composite is cast within the cavity through injection and said resin composite is cured by irradiation with high-energy rays from the outside of the mold through an aperture part. CONSTITUTION:The inside of a cavity 4 is evacuated up to 10 Torr by clamping a mold 1. A predetermined quantity of a resin composite is cast at pressure of 10kg/cm by making use of a metering pump. Ultraviolet rays are directed to the resin composite through an aperture part 5 constituted of quartz plates 5a, 5b of the mold 1. Cooling is performed by passing cooling water kept at 30 deg.C through the mold 1 during irradiation with the ultraviolet rays. A disk is taken out by making use of the mold 1 after that.
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公开(公告)号：JPS625819A
公开(公告)日：1987-01-12
申请号：JP14493885
申请日：1985-07-02
Applicant: SHOWA DENKO KK
Inventor： WASHIYAMA JUNICHIRO , MINORIKAWA NAOKI , SAEDA SHIGERU
Abstract: PURPOSE:To facilitate to control the curing reaction of resin and effect resin molding having short molding cycle by a method wherein hardening resin composition is injected into a mold consisting of a material, whose one part permeates high energy rays, and the high energy rays are projected against the resin composition through the mold. CONSTITUTION:The hardening resin, polymerization initiating agent and the like are sent out of material tanks 9A, 9B respectively to introduce them into a mixing and metering unit 10 and mix them uniformly after metering necessary amount in the mixing and metering unit 10, thereafter, they are sent into an injection molding machine 8. The injection molding machine 8 pressurizes the composition and injects them into a cavity through the pouring port of the mold 6. On the other hand, laser beams 2, generated in a laser beam generating unit 1, are expanded so as to be adaptable to the mold 6 by a diaphragm 3 and the group of lenses 4, 5 and are projected against the composition in the cavity through a window 7. After projecting the beams for a predetermined time, the resin, cured in the cavity, is taken out of the cavity.
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Patent Agency Ranking
公开(公告)号：JPH093282A
公开(公告)日：1997-01-07
申请号：JP14908295
申请日：1995-06-15
Applicant: SHOWA DENKO KK
Inventor： KIRA SATOSHI , TANAKA TETSUTADA , MINORIKAWA NAOKI
Abstract: PURPOSE: To obtain a chlorinated polyolefin resin composition excellent in flexibility, flame resistance, mechanical characteristics, heat resistance and adhesiveness to a polyester fiber. CONSTITUTION: This chlorinated polyolefin resin composition is obtained by blending 100 pts.wt. of a composition comprising (A) 20-80wt.% of a chlorinated polyolefin and (B) 80-20 pts.wt. of a polyolefin-based resin containing at least one functional group selected from the group consisting of an acid anhydride group, a carboxyl group and a metal carboxylate with (C) 0.1-10 pts.wt. of an epoxy compound and (D) 1.0-20 pts.wt. of antimony oxide.
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公开(公告)号：JPH04119178A
公开(公告)日：1992-04-20
申请号：JP22990790
申请日：1990-08-31
Applicant: SHOWA DENKO KK
Inventor： ARAKAWA TSUTOMU , MINORIKAWA NAOKI , ABE KAZUTO , OTAKE ISAO , MARUYAMA SATOSHI
Abstract: PURPOSE:To obtain a dyed plastic lens resistant to fading with ultraviolet ray and heat by dyeing a specific plastic lens with an aqueous solution of a disperse dye containing a specific amount of nickel p-toluenesulfonate in the solution. CONSTITUTION:A dyed plastic lens resistant to fading of the dye with ultraviolet ray, heat, etc., can be produced by dyeing a plastic lens having a relatively high refractive index and containing aromatic ring, halogen atom (excluding fluorine), sulfur atom, etc., (e.g. copolymer of polystyrene diacrylate and CR-39) at 50-100 deg.C in a dyeing bath produced by adding 0.001-5wt.% of nickel p- toluenesulfonate to an aqueous solution containing a disperse dye.
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公开(公告)号：JPH03243626A
公开(公告)日：1991-10-30
申请号：JP4074590
申请日：1990-02-21
Applicant: SHOWA DENKO KK
Inventor： MINORIKAWA NAOKI , ARAKAWA TSUTOMU , MARUYAMA SATOSHI , TAGOSHI HIROTAKA
Abstract: PURPOSE:To obtain the subject composition useful as optical materials or a sealing agent, etc., having excellent storing stability by adding radical polymerization initiator to monomeric components comprising a specific prepolymer and a polymerizable monomer copolymerizable with said prepolymer. CONSTITUTION:A (meth)acryloyl group of a compound expressed by formula I (R and R are H or methyl; m and n are 1-5) is subjected to addition polymerization together with mercapto functional group of a polythiol expressed by formula II (R is organic group composed of polyfunctional aliphatic or aromatic hydrocarbon; n is integer of >=2) in an equivalent ratio of 0.02-1.01 preferably in the presence of a basic catalyst such as triphenylphosphine to obtain a prepolymer having a polythiol skeleton. Next, a radical polymerization initiator, preferably in an amount of 0.01-10 mol%, is added to monomer components composed of 30 wt.% said prepolymer and 70 wt.% polymerizable monomer copolymerizable with said prepolymer to afford the aimed composition.
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公开(公告)号：JPH03195733A
公开(公告)日：1991-08-27
申请号：JP33599289
申请日：1989-12-25
Applicant: SHOWA DENKO KK
Inventor： ABE KAZUTO , TAKOSHI HIROTAKA , YOSHIDA HARUO , MARUYAMA SATOSHI , MINORIKAWA NAOKI , ARAKAWA TSUTOMU
Abstract: PURPOSE:To obtain the title composition consisting of dimercaptodiphenylsulfide and a polyisocyanate compound and having excellent curing property, capable of giving a transparent cured article having high refractive index and useful for optical material, eye lens, coating, sealing agent, paint, adhesive, etc., CONSTITUTION:The aimed composition consisting of (A) 4,4'- dimercaptodiphenylsulfide expressed by the formula and (B) a compound (e.g. hexamethylenediisocyanate, isophoronediisocyanate or 4,4'- dicyclohexamethanediisocyanate) having at least two isocyanate groups in one molecule. Furthermore, molar ratio of isocyanate group of the component B to mercapto group of the component A is preferably 0.5-1.5.
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公开(公告)号：JPH0321638A
公开(公告)日：1991-01-30
申请号：JP15752889
申请日：1989-06-20
Applicant: SHOWA DENKO KK
Inventor： MINORIKAWA NAOKI , ARAKAWA TSUTOMU , MARUYAMA SATOSHI , YOSHIDA HARUO , TAGOSHI HIROTAKA
Abstract: PURPOSE:To obtain the subject composition having excellent curability and giving a cured material having excellent optical uniformity and high refractive index by using a specific sulfide, other vinyl monomer copolymerizable with said sulfide and a polythiol as essential components. CONSTITUTION:The objective composition is composed of (A) 4,4'-bis(methacryloylthio)diphenyl sulfide of formula, (B) other vinyl monomer copolymerizable with the component A and (C) a polythiol of formula R-(SH)n (R is polyvalent organic group; n is integer of >=2). The content of the component C is 10-90% based on A+B+C and the equivalent ratio of the mercapto group of the component C to the methacryloyl group of the component A is 0. 001-1.01.
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