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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：JP2002060574A
公开(公告)日：2002-02-26
申请号：JP2000249414
申请日：2000-08-21
Applicant: SHOWA DENKO KK
Inventor： KUMAKI TERUTOSHI , ARAKAWA TSUTOMU
Abstract: PROBLEM TO BE SOLVED: To obtain a vinyl chloride-based resin composition having excellent mechanical characteristics. SOLUTION: This vinyl chloride-based resin composition is characterized in that the vinyl chloride-based resin composition comprises 1 mass pts. to 30 mass pts. of a chlorinated polyolefin based on 100 mass pts. a resin composition composed of 50-90 mass pts. a vinyl chloride-based resin containing 0 mass % to 50 mass % of a plasticizer and 50 mass pts. to 1 mass pt. of a polyolefin resin and has 10 J/g-100 J/g crystal heat of fusion by a DSC method of the chlorinated polyolefin and 35 mass %-60 mass % chlorine content of amorphous part.
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公开(公告)号：JPH11246723A
公开(公告)日：1999-09-14
申请号：JP4955598
申请日：1998-03-02
Applicant: SHOWA DENKO KK
Inventor： KUMAKI TERUTOSHI , AOYANAGI TERU , ARAKAWA TSUTOMU
Abstract: PROBLEM TO BE SOLVED: To obtain a vinyl chloride resin compsn. excellent in mechanical properties, esp. impact strength, by compounding a vinyl chloride resin with specified amts. of an impact modifier and an inorg. filler surface-treated with a cationic polymer. SOLUTION: This compsn. comprises 100 pts.wt. vinyl chloride resin (e.g. PVC) pref. having an average degree of polymn. of 300-2,000, still pref. 400-1,800, esp. pref. 500-1,600, 3-20 pts.wt., pref. 5-15 pts.wt. impact modifier (e.g. a chlorinated polyolefin), and 5-150 pts.wt., pref. 10-100 pts.wt., inorg. filler (e.g. calcium carbonate) surface-treated with a cationic polymer [e.g. poly(vinyl chloride trimethylammonium)] and can be produced by a general mixing method using a mixing roll, a Banbury mixer, a kneader, an extruder, etc.
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公开(公告)号：JP2729672B2
公开(公告)日：1998-03-18
申请号：JP19107589
申请日：1989-07-24
Applicant: SHOWA DENKO KK
Inventor： ARAKAWA TSUTOMU , MARUYAMA SATOSHI , UCHIDA HIROSHI
IPC: C08F218/16 , C08F18/14 , C08F290/00 , C08F290/06 , C08F299/00
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公开(公告)号：JPH07228736A
公开(公告)日：1995-08-29
申请号：JP2058694
申请日：1994-02-17
Applicant: SHOWA DENKO KK
Inventor： ARAKAWA TSUTOMU
Abstract: PURPOSE:To obtain a resin composition and a molding thereof which have moderate flexibility, are excellent in flame retardancy and compression set, and are advantageous in cost by mixing a crystalline chlorinated polyolefin with a thermoplastic elastomer and a metal hydroxide. CONSTITUTION:100 pts.wt. resin composition comprising a crystalline chlorinated polyolefin (A), and a thermoplastic elastomer (B) in a proportion of 10/90 to 90/10 by weight is mixed with 20-30 pts.wt. metal hydroxide (C). Examples of the ingredient (A) include a chlorinated polyethylene and a chlorinated ethylene/propylene copolymer each having a chlorine content of 20-45wt.% and a heat of crystal fusion as measured by DSC of 3-25cal/g. Examples of the ingredient (B) include polyolefin elastomers. The ingredient (C) may be a hydroxide of a Group II or III metal of the Periodic Table, e.g. magnesium or aluminum, the hydroxide having an average particle diameter of 0.5-150mum.
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Patent Agency Ranking
公开(公告)号：JPH05339449A
公开(公告)日：1993-12-21
申请号：JP14590892
申请日：1992-06-05
Applicant: SHOWA DENKO KK
Inventor： ARAKAWA TSUTOMU , OZAKI KAZUYASU
IPC: C08K3/22 , C08K5/02 , C08K5/17 , C08K5/20 , C08L23/08 , C08L23/16 , C08L23/26 , C08L23/28 , C08L31/04
Abstract: PURPOSE:To provide a flame-retardant composition which shows excellent flame retardancy, toughness, heat resistance and coldness resistance, causes no delamination in molding or forming, and gives good appearance. CONSTITUTION:100 pts.wt. of a composition comprising (A) 15 to 40wt.% of propylene-ethylene random copolymer (ethylene content: 1 to 10wt.%; MFR: 1 to 100), (B) 10 to 50wt.% of chlorinated polyethylene (chlorine content: 20 to 50wt.%), and at least 10wt.% of ethylene-vinyl acetate copolymer (vinyl acetate content: 1 to 25wt.%; MFR: 5 to 30) are formulated with 5 to 50 pts.wt. of (D) a halogen-containing organic compound and/or (E) antimony oxide, (F) totally 5 to 50 pts.wt. of magnesium and/or aluminum hydroxides and (G) 0.1 to 2 pts.wt. of fatty acid amide.
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公开(公告)号：JPH0586245A
公开(公告)日：1993-04-06
申请号：JP25177091
申请日：1991-09-30
Applicant: SHOWA DENKO KK
Inventor： ENDO MAKOTO , ARAKAWA TSUTOMU , TAKEMURA KENJI
Abstract: PURPOSE:To obtain the subject composition improved in heat stability, prevented in coloring of a molded body and useful as a characteristics improver of a large-sized molded product by mixing a chlorinated polyethylene with a phosphorus based reducing agent. CONSTITUTION:The objective composition obtained by mixing (A) 100 pts.wt. chlorinated polyethylene having 15-50wt.%, preferably 20-40wt.% chlorine content with (B) 0.01-5 pts.wt., preferably 0.05-4 pts.wt. phosphorus based reducing agent (e.g. ammonium hypophosphite or sodium hypophosphite). The composition is prepared by e.g. a method by adding the component B to the component A in an aqueous solution in the production process of the component A, method by dry-mixing the powdery component B with powder of the component A using a Henshel mixer, etc., and method melting and kneading the component A with the component B using a kneader, etc. Furthermore, melting, kneading and molding of the composition are preferably carried out at
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公开(公告)号：JPH0457980A
公开(公告)日：1992-02-25
申请号：JP17048990
申请日：1990-06-28
Applicant: SHOWA DENKO KK
Inventor： MARUYAMA SATOSHI , OTAKE ISAO , MINORIKAWA NAOKI , ARAKAWA TSUTOMU , ABE KAZUTO
Abstract: PURPOSE:To accomplish the uniform, stable dyeing of plastic lens by treating the surface of plastic lens with a specific carrier followed by immersing and treating the resultant lens in a disperse dye-contg. dyeing bath. CONSTITUTION:Plastic lens, esp. consisting of a low water-absorptive resin containing aromatic ring and/or halogen element is immersed in an aqueous solution (or organic solvent solution) of a carrier of the formula (R and R are each H, aliphatic hydrocarbon or aromatic hydrocarbon; R is 2-10C alkylene; where, R and R are not H at the same time; (m) is 1-10) to treat the surface of said lens followed by treating the resultant lens in a disperse dye-contg. dyeing bath at 50-l00 deg.C for 5sec to 1hr or so, thus accomplishing the objective uniform dyeing of the lens with a desired hue.
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公开(公告)号：JPH02113027A
公开(公告)日：1990-04-25
申请号：JP26577888
申请日：1988-10-20
Applicant: SHOWA DENKO KK
Inventor： ARAKAWA TSUTOMU , MINORIKAWA NAOKI , MARUYAMA SATOSHI , TAKOSHI HIROTAKA , YOSHIDA HARUO
Abstract: PURPOSE:To provide a curable composition giving cured products having excellent curability, high refractive index, low water absorptivity and excellent optical uniformity and suitable as an optical material, etc., by comprising 4,4'- dimercaptodiphenyl sulfide dimethacrylate and polythiol. CONSTITUTION:A curable composition comprises (A) 4,4'-dimercaptodiphenyl sulfide dimethacrylate (e.g., prepared by dissolving a dithiol of formula II in an alkali aqueous solution and subsequently reacting the dissolved dithiol with methacrylic chloride), (B) a polythiol of formula III (R is polyvalent organic group; n is >=2) (e.g., 9,10-anthracenedimethanethiol) preferably in a B/A functional group equivalent ratio of 0.01-1.0 and preferably a radical polymerization initiator such as 2,2'-azobisisobutyronitrile.
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公开(公告)号：JP2003160735A
公开(公告)日：2003-06-06
申请号：JP2002260024
申请日：2002-09-05
Applicant: SHOWA DENKO KK
Inventor： TSUKAMOTO SHINJI , SAKAE ICHIRO , ARAKAWA TSUTOMU
IPC: C08L101/00 , C08K3/00
Abstract: PROBLEM TO BE SOLVED: To provide a resin composition which is highly filled with a filler such as a magnetic powder and the like, and has excellent strength and flexibility. SOLUTION: The resin composition contains 50-95 pts.mass of an elastomer (A) having a weight average molecular weight of ≥300,000 measured by gel permeation chromatography, 50-5 pts.mass of an ethylene copolymer (B) having a melting point of ≤110°C and 100-2,000 pts.mass of a filler based on 100 pts. mass of (A)+(B). COPYRIGHT: (C)2003,JPO
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