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公开(公告)号：JPH01228942A
公开(公告)日：1989-09-12
申请号：JP5547588
申请日：1988-03-09
Applicant: SHOWA DENKO KK
Inventor： MINORIKAWA NAOKI , MARUYAMA SATOSHI
Abstract: NEW MATERIAL:The compound of formula I (R1 and R2 are H or methyl; R3 and R4 are H or ]decane. USE:Useful as an optical material, coating agent, sealant, paint, adhesive, etc. It is a difunctional polymerizable monomer having low anaerobic property, excellent optical uniformity, low hygroscopicity and high heat-resistance, abrasion resistance, etc. PREPARATION:The compound of formula I can be produced by the ester interchange reaction of a diol of formula II or formula III (R5 and R are
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公开(公告)号：JPH01201306A
公开(公告)日：1989-08-14
申请号：JP2636788
申请日：1988-02-06
Applicant: SHOWA DENKO KK
Inventor： MARUYAMA SATOSHI , MINORIKAWA NAOKI , OTAKE ISAO , ARAKAWA TSUTOMU
IPC: G02B1/04 , C08F16/32 , C08F290/00 , C08F299/00 , G11B7/253
Abstract: PURPOSE:To provide an optical material having a low water absorptivity, excelling in optical homogeneity, abrasion resistance, etc., and suited for lenses, optical disc bases, etc., by constituting it from a (co)polymer of a specified alicyclic (meth)allyl ether compound. CONSTITUTION:This optical material is prepared from a polymer of a compound of formula I (wherein R1 and R2 are each H or methyl, l is 1-3, m and n are each 0-8, and 0
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公开(公告)号：JPS63297008A
公开(公告)日：1988-12-05
申请号：JP13436387
申请日：1987-05-29
Applicant: SHOWA DENKO KK
Inventor： SAEDA SHIGERU , MARUYAMA SATOSHI , ARAKAWA TSUTOMU , MINORIKAWA NAOKI
Abstract: PURPOSE:To produce the high quality plastic lens with good yield, while the surface contamination or unevenness of a molding, the mold release in polymerization process and the occurrence of voids are prevented by thermally polymerizing the raw material-monomer under the atmosphere whose oxygen concentration is lower than that of normal atmosphere until the stage where said monomer is polymerized and its gelation is initiated. CONSTITUTION:Two matrixes with desired curved surfaces are fixed oppositely by using an annular gasket, or two matrixes are positioned oppositely and are fixed by winding a tape around these matrixes. The raw material monomer containing a radical polymerization initiator and other additives is poured into the cavity between two matrixes, and is thermally polymerized under the atmosphere whose oxygen concentration is lower than that of normal atmosphere until the stage where its gelation is initiated. Next, the annular gasket or the tape is removed from the matrixes, and the thermal polymerization is further advanced and finished in the oxygen concentration of the normal atmosphere. The annular gasket or the tape is generally used as the means for fastening the matrixes, but the tape is preferably used from the point of operability.
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公开(公告)号：JPS62212602A
公开(公告)日：1987-09-18
申请号：JP5636086
申请日：1986-03-14
Applicant: SHOWA DENKO KK
Inventor： WASHIYAMA JUNICHIRO , NINAGAWA JINICHI , ENDO YOSHIKAZU , MINORIKAWA NAOKI
IPC: B32B9/00 , C08G75/02 , G02B1/04 , G11B7/24 , G11B7/24047 , G11B7/253 , G11B7/2533 , G11B7/256
Abstract: PURPOSE:To obtain a transparent base material which obviates the exfoliation of a medium layer even if the material is used for a long period of time by providing an aluminum oxide layer on the surface of a molding obtd. by molding and curing a compsn. consisting of an acetal compd. and mercapto compd. CONSTITUTION:The aluminum oxide layer is formed on the surface of the molding obtd. by during the compsn. consisting of the compd. having at least two unsatd. cycloacetal groups per molecule and the compd. having least two mercapto groups per molecule. The aluminum oxide layer exhibits extremely good affinity to said molding and has also the good adhesiveness with the medium layer which is provided on the base material and consists of Al, etc. The transparent base material is thereby made to be satisfactorily and tightly adhered with the medium layer consisting of the Al, etc., and the optical disk or the like consisting of such transparent base material is free from the generation of the exfoliation of the medium layer or the like even when the disk is used for a long period of time.
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公开(公告)号：JPS62212438A
公开(公告)日：1987-09-18
申请号：JP5635986
申请日：1986-03-14
Applicant: SHOWA DENKO KK
Inventor： WASHIYAMA JUNICHIRO , MINORIKAWA NAOKI
IPC: G02B1/04 , C08G75/02 , C08G75/04 , G11B7/24 , G11B7/24047 , G11B7/253 , G11B7/2533
Abstract: PURPOSE:To form a curable composition excellent in heat resistance, water resistance and optical properties and suitable as the material of optical disk bases, by mixing a specified acetal compound with a specified mercapto compound and a specified isocyanuric acid derivative. CONSTITUTION:This curable composition contains the following three com ponents A-C. (A): a compound having at least two unsaturated cycloacetal groups per molecule, (B): a compound having at least two mercapto groups per molecule, and (C): an isocyanuric acid derivative compound having a total of at least two acryloyl groups and/or methacryloyl groups per molecule. Said composition can be cured by irradiation with actinic radiations, heating or a combination thereof.
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Patent Agency Ranking
公开(公告)号：JP2011122141A
公开(公告)日：2011-06-23
申请号：JP2010247999
申请日：2010-11-05
Applicant: Showa Denko Kk , 昭和電工株式会社
Inventor： TAKENOSHITA YOICHIRO , MINORIKAWA NAOKI
Abstract: PROBLEM TO BE SOLVED: To provide a chloroprene polymer latex excellent in the balance of temporal stability of flexibility and tensile strength and tensile elongation and useful as a raw material for expendable gloves for medical use etc. SOLUTION: In this chloroprene polymer latex, the fraction of each monomer unit constituting the polymer, when the total of the monomer units is represented in 100 mass%, comprises 85-95 mass% chloroprene (A-1) and 15-5 mass% 2,3-dichloro-1,3-butadiene (A-2), or 77-95 mass% chloroprene (A-1), 15-5 mass% 2,3-dichloro-1,3-butadiene (A-2) and 0.2-13 mass% monomer (A-3)capable of copolymerizing with them, and the quantity of tetrahydrofuran insoluble in the polymer is 3-34 mass% and crystallization rate R äR represents the time required for the increase of hardness by 5 points from the initial (time=0) hardness measured at -10°C based on JIS K6253}, which is represented by the increase in the hardness at -10°C of the dried polymer, is not less than 200 hours. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：提供在柔韧性，拉伸强度和拉伸伸长率的时间稳定性的平衡方面优异的氯丁二烯聚合物胶乳，并且作为用于医疗用途的消耗性手套的原料是有用的。解决方案：在这 氯丁二烯聚合物胶乳，构成聚合物的各单体单元的分数，当单体单元总量为100质量％时，含有85-95质量％氯丁二烯（A-1）和15-5质量％ 或二氯-1,3-丁二烯（A-2）或77-95质量％氯丁二烯（A-1），15-5质量％2,3-二氯-1,3-丁二烯（A-2） 能够与它们共聚的13质量％单体（A-3），不溶于聚合物的四氢呋喃的量为3-34质量％，结晶化率RäR表示从初始浓度增加5分钟所需的时间 （基于JIS K6253）在-10℃下测量的（时间= 0）硬度，其由干燥聚合物的-10℃下的硬度的升高表示，不小于 n 200小时。 版权所有（C）2011，JPO＆INPIT
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公开(公告)号：JPH0948881A
公开(公告)日：1997-02-18
申请号：JP19876595
申请日：1995-08-03
Applicant: SHOWA DENKO KK
Inventor： MINORIKAWA NAOKI , UENO MASAHIRO , OKAMOTO KOJI
Abstract: PROBLEM TO BE SOLVED: To obtain the subject composition excellent in low neck-in properties without causing molding trouble such as thickening of both film selvedges or the film caught by rolls and further a resin loss due to the cutting of both the selvedges by blending a specific polyolefin-based resin mixture with an inorganic filler. SOLUTION: This resin composition for laminating is obtained by blending (A) 100 pts.wt. polyolefin-based resin mixture comprising (A1 ) a polyolefin-based resin containing functional groups such as an ethylene-maleic anhydride copolymer or an ethylene-(meth)acrylic acid (metallic salt) copolymer and (A2 ) a polyolefin-based resin such as polyethylene or polypropylene at 0-80wt.% mixing ratio of the component (A2 ) with (B) 0.01-4 pts.wt. inorganic filler such as talc or clay.
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公开(公告)号：JPH07228734A
公开(公告)日：1995-08-29
申请号：JP2125394
申请日：1994-02-18
Applicant: SHOWA DENKO KK
Inventor： MINORIKAWA NAOKI , YAMAMOTO KUNIO , NAKAYAMA TAKASHI , HASHIMOTO AKIRA , AIZAWA TOSHIYUKI
Abstract: PURPOSE:To obtain a modified polyolefin resin composition which is not only usable as a modifier having an excellent balance between rigidity and impact resistance and satisfactory moldability but also useful CONSTITUTION:This composition comprises an acid-modified polyolefin resin having a content of acid anhydride groups of 0.01-1.5mol/kg and an amide- modified polyolefin resin obtained by mixing 100 pts.wt. polyolefin resin which is in, e.g. a molten state or solution state with 0.1-10 pts.wt. N-vinylalkylamide in the presence of an organic peroxide.
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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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