公开(公告)号：JPS62212439A

公开(公告)日：1987-09-18

申请号：JP5636186

申请日：1986-03-14

Applicant: SHOWA DENKO KK

Inventor： WASHIYAMA JUNICHIRO ,  MINORIKAWA NAOKI

IPC: G02B1/04 ,  C08G75/02 ,  C08G75/04 ,  C08L33/12 ,  C08L81/02 ,  G11B7/24 ,  G11B7/24047 ,  G11B7/253 ,  G11B7/2533

Abstract: PURPOSE:To form a curable composition having properties necessary for the material of optical disk bases and good productivity, by mixing a specified acetal compound with a specified mercapto compound, a specified reactive unsaturated compound and a polymethyl methacrylate resin. CONSTITUTION:This curable composition contains the following four components (a)-(d). (a): a compound having at least two unsaturated cycloacetal groups per molecule, (b): a compound having at least two mercapto groups per molecule, (c): a compound having at least two reactive unsaturated bonds per molecule, and (d): polymethyl methacrylate resin. As component (c), a bisphenol, an isocyanuric acid derivative, a triazine compound or the like is preferable in respect of the heat resistance and water resistance of the curable composition.

公开(公告)号：JPS62211118A

公开(公告)日：1987-09-17

申请号：JP5535586

申请日：1986-03-13

Applicant: SHOWA DENKO KK

Inventor： WASHIYAMA JUNICHIRO ,  MINORIKAWA NAOKI

IPC: B29C33/06 ,  B29C45/00 ,  B29C45/26 ,  B29C45/77 ,  B29K101/10 ,  G11B7/26

Abstract: PURPOSE:To prevent the occurrence of a gap between a cavity and a molded body by moving the part of a mold so as to shrink the cavity, when high energy ray is radiated onto the hardening resin composition injected into the cavity of a mold and harden the resin composition. CONSTITUTION:A mold 1 is composed of a top force 2 and a bottom force 3, and a cavity 4 is formed in between the top and bottom forces. The window part 5 through which high energy ray can penetrate is provided on the top force 2. The window part 5 is composed of the first quartz glass plate 5a and the second quartz glass plate 5b, and the space between the first and the second quartz glasses becomes a cooling chamber 5c. In this process, while the hardening reaction of the composition is advanced by the radiation of high energy ray, the cavity 4 is caused to shrink so as to absorb the polymerization shrinkage of the composition. The shrinkage of the cavity 4 is achieved by energizing upward the bottom force 3 of the mold 1 with specified pressure, using the air cylinder of the molding device.

公开(公告)号：JPS62101631A

公开(公告)日：1987-05-12

申请号：JP24326885

申请日：1985-10-30

Applicant: SHOWA DENKO KK

Inventor： MINORIKAWA NAOKI ,  WASHIYAMA JUNICHIRO ,  SAEDA SHIGERU

IPC: C08G75/02 ,  G11B7/24 ,  G11B7/24047 ,  G11B7/253 ,  G11B7/2533

Abstract: PURPOSE:To obtain a curable composition which can give a transparent high- strength information recording disk, etc., by mixing an unsaturated cycloacetal group-containing compound with a mercapto group-containing compound and a compound having a triazine ring and a reactive unsaturated bond. CONSTITUTION:The purpose curable composition is obtained by mixing a compound (A) having at least two unsaturated cycloacetal groups in the molecule with a compound (B) having at least two mercapto groups in the molecule (e.g., dipentene dimercaptan) and a compound (C) having at least one triazine ring in the molecule and at least two reactive unsaturated bonds per triazine ring (e.g., N,N'-bisacryloylmethyl-N,N',N'',N'''-tetrakismethoxymethylmelamine). This curable composition can be suitably used as, e.g., a material for video disks.

公开(公告)号：JPH06322024A

公开(公告)日：1994-11-22

申请号：JP10829793

申请日：1993-05-10

Applicant: SHOWA DENKO KK

Inventor： MINORIKAWA NAOKI ,  TAJIMA KOICHI

IPC: C08F8/30

Abstract: PURPOSE:To provide the subject method which is useful for producing new compatibilizer, adhesive resin, etc. CONSTITUTION:Fluffs or pellets of a polyolefin are halogenated and then reacted with ammonia in the absence of a catalyst, under ultraviolet irradiation, in the presence of an amination catalyst, or in the presence of an amination catalyst under ultraviolet irradiation. Thus, controlling the dispersion characteristics of a polyolefin-based polymer alloy is facilitated, and the surface characteristics, such as coatability, adhesive properties, and printability, of a polyolefin are greatly improved.

公开(公告)号：JPH0641390A

公开(公告)日：1994-02-15

申请号：JP8115292

申请日：1992-04-02

Applicant: SHOWA DENKO KK

Inventor： MINORIKAWA NAOKI ,  NAKAYAMA TAKASHI ,  TAJIMA KOICHI ,  ASAI KUNIHIKO ,  AOKI TAKAAKI ,  KOBAYASHI HIROSHI

IPC: C08K3/00 ,  C08L9/00 ,  C08L21/00 ,  C08L23/00 ,  C08L23/08 ,  C08L51/00 ,  C08L51/06 ,  C08L57/00

Abstract: PURPOSE:To provide an inexpensive composition containing a polyolefin based resin grafted with a monomer having plural hydroxyl groups, a copolymer of hydroxyl group-containing monomer and ethylene, a thermoplstic elstomer and an inorganic filler and having good coating properties and dyeability. CONSTITUTION:The resin composition having easy coating properties is obtained by blending (A) 10-80wt.% polyolefin based resin (e.g. polypropylene homopolymer) grafted with 4-600 (mmol/kg-polyolefin based resin) compound expressed by the formula (R is H or CH,), e.g. glycerin mono(meth)acrylate with (B) 5-40wt.% copolymer obtained by radically polymerizing at least 2 components of ethylene and a polymerizable compound having OH group binding to the carbon other than polymerizable unsaturated carbon (e.g. 2-hydroxyethyl methacrylate) under a high pressure, (C) 5-35wt.% thermoplastic elastomer (e.g. ethylene-propylene rubber) and (D) 3-15wt.% inorganic filter (e.g. talc).

公开(公告)号：JPH04202216A

公开(公告)日：1992-07-23

申请号：JP33128890

申请日：1990-11-29

Applicant: SHOWA DENKO KK

Inventor： ABE KAZUTO ,  MINORIKAWA NAOKI ,  ARAKAWA TSUTOMU ,  MARUYAMA SATOSHI

IPC: C08G18/50

Abstract: PURPOSE:To obtain a resin composition which is excellent in curability and can give a cured product having transparency and a high refractive index by mixing a compound having a specified aromatic sulfide group and two hydroxyl groups with a compound having a plurality of isocyanate groups. CONSTITUTION:A high-refractive index resin composition is obtained by mixing 4,4-bis[CO--hydropoly(oxyalkylene)thio]diphenyl sulfide of the formula (wherein m and n are each 1-5; and R is H or CH3) with a compound having at least two NCO groups in the molecule (e.g. hexamethylene diisocyanate). This composition excels in curability, and a resin prepared by curing it has transparency and a high refractive index, so that it is useful in industrial fields of optical materials, spectacle lenses, coating materials, sealing materials, paints, adhesives, etc., especially in the field of optical materials.

公开(公告)号：JPH0457977A

公开(公告)日：1992-02-25

申请号：JP16183790

申请日：1990-06-20

Applicant: SHOWA DENKO KK

Inventor： MARUYAMA SATOSHI ,  OTAKE ISAO ,  MINORIKAWA NAOKI ,  ARAKAWA TSUTOMU ,  ABE KAZUTO

IPC: D06P1/60 ,  D06P5/00

Abstract: PURPOSE:To carry out the uniform dyeing of plastic lens with favorable color tone by immersing and treating plastic lens in a dying solution prepared by adding a specific carrier to an aqueous disperse dye solution. CONSTITUTION:Plastic lens, esp. made from a low water-absorptive resin material containing aromatic ring and/or halogen element is immersed and treated at 50-100 deg.C for 5sec to 1hr or so in a dyeing bath containing a disperse dye, formulated with a carrier consisting of a propylene glycol monomethyl ether of formula I R is 1-3C alkyl; R is CH2-CH(CH3) or CH2CH2CH2; (n) is 1-2) and/or compound of formula II [R and R are each H or 1-3C alkyl; R is of formula III or formula IV (R is H or 1-3C alkyl); where, R , R and R are not H at the same time; (m) is 1-2)] (e.g. 3-methoxy-1,2-propanediol), thus accomplishing the objective uniform dyeing of the lens. The lens thus dyed is suitable as sunglass, etc.

公开(公告)号：JPH03199218A

公开(公告)日：1991-08-30

申请号：JP34033989

申请日：1989-12-27

Applicant: SHOWA DENKO KK

Inventor： MINORIKAWA NAOKI ,  MARUYAMA SATOSHI ,  UCHIDA HIROSHI

IPC: C08F299/00 ,  C08F290/00 ,  C08F290/06 ,  C08G63/21 ,  C08G63/47 ,  G02B1/04

Abstract: PURPOSE:To obtain the title readily moldable composition suitable as plastic lens, having high refractive index, excellent heat resistance, impact resistance, etc., by blending a specific diallyl phthalate-based oligomer with vinyl-based monomer and radical polymerization initiator. CONSTITUTION:(A) >=10wt.% diallyl phthalate-based oligomer shown by the formula (R is 2-20C hydrocarbon; Ar is phenylene; n is 1-100) and having 20-100 degree of unsaturation is blended with (B) a vinyl-based monomer such as methyl acrylate copolymerizable with the component A and (C) preferably 0.001-20mol% radical polymerization initiator such as 2,2'-azobisisobutylonitrile to give the objective composition.

公开(公告)号：JPH03163120A

公开(公告)日：1991-07-15

申请号：JP30356389

申请日：1989-11-22

Applicant: SHOWA DENKO KK

Inventor： ARAKAWA TSUTOMU ,  MINORIKAWA NAOKI ,  MARUYAMA SATOSHI ,  YOSHIDA HARUO ,  TAKOSHI HIROYUKI

IPC: G03F7/004 ,  C08F290/00 ,  C08F299/00 ,  G03F7/038

Abstract: PURPOSE:To prepare the title compsn. having an excellent curability and giving a cured product with a high refractive index and low water absorption by compounding a specific diphenyl sulfide compd. and a specific polythiol compd. as the essential components. CONSTITUTION:The title compsn. is prepd. by compounding as the essential components 4,4'-bis[omega-(meth)acryloyl(polyoxyalkylene)thio]diphenyl sulfide compd. of formula I (wherein R1 and R2 are each H or CH3; and m and n are each 1-5) and a polythiol compd. of formula II (wherein R is a polyvalent org. group; and n is an integer of 2 or higher) (e.g. pentaerithritol tetrathiopropionate). The compsn. has an excellent curability and gives a cured product with high impact strength and high refractive index and a low water absorption, so that it is useful for an optical material as well as for a coating material, sealant, adhesive, etc.

公开(公告)号：JPH0354226A

公开(公告)日：1991-03-08

申请号：JP19020389

申请日：1989-07-21

Applicant: SHOWA DENKO KK

Inventor： MINORIKAWA NAOKI ,  ARAKAWA TSUTOMU ,  MARUYAMA SATOSHI ,  YOSHIDA HARUO ,  TAKOSHI HIROTAKA

IPC: C08G75/00 ,  C08G75/02 ,  C08G75/04 ,  C08G75/26 ,  G02B1/04

Abstract: PURPOSE:To prepare a curable compsn. giving a cured product excellent in the optical homogeneity and low water absorption properties by reacting 4,4'-bis- methacryloylthio)diphenyl sulfide with a specific polythiol in another polymerizable monomer. CONSTITUTION:4,4'-Bis(methacryloylthio)diphenyl sulfide of formula I is reacted with a polythioether of formula II (wherein R is an org. group comprising an aliph. or arom. hydrocarbon group; and n is 2 or higher) (e.g. ethylene glycol dithioglycolate) in such an amt. that the equivalent ratio of the mercapto group of the polythioether to the methacryloyl group of the sulfide is 0.02-1.01 in another polymerizable monomer (e.g. styrene) in the presence of a basic catalyst (e.g. diethylamine) and a solvent at 0-100 deg.C to produce a curable compsn. contg. a prepolymer having a polythioether backbone formed by the reaction of the sulfide with the polythioether and the polymerizable monomer.