PLASTIC OPTICAL FIBER
    91.
    发明专利

    公开(公告)号:JPH0274908A

    公开(公告)日:1990-03-14

    申请号:JP23024488

    申请日:1988-09-09

    Abstract: PURPOSE:To improve heat resistance, moisture resistance and mechanical properties by copolymerizing at least one selected from specific compds. and a specific compd. and forming specific transparent polyester as a core. CONSTITUTION:At least one selected from the compd. expressed by formula I and the compd. selected from terephthalic acid, etc., and the compd. having halogen or hydrocarbon group in at least one of 1', 2', 4', 5' positions in formula II (1 to 5 and 1' to 5' are the positions of substituent) are copolymerized. The transparent polyester formed by incorporating >=15mol% compd. which has >=120 deg.C glass transition temp. and is expressed by formula II is formed as the core. In formula, X is selected from a group consisting of O, S, etc., and alkylidene group; Y is selected from OH or the reactive deriv. group thereof; A1, A2 are selected from a group consisting of halogen and hydrocarbon group. The plastic optical fiber having the excellent heat resistance, light transmission performance, and wet heat resistance is obtd. in this way.

    OPTICAL DISK SUBSTRATE
    92.
    发明专利

    公开(公告)号:JPH023128A

    公开(公告)日:1990-01-08

    申请号:JP20083988

    申请日:1988-08-11

    Abstract: PURPOSE:To obtain the substrate having high heat resistance, transparency and low hygroscopicity and further extremely low double refractions by using a material essentially consisting of thermoplastic arom. polyester contg. a specific structural unit. CONSTITUTION:The extremely low double refractive optical disk substrate which is improved in the heat resistance, transparency and low hygroscopicity and has

    FLUORINATED COATING COMPOSITION
    93.
    发明专利

    公开(公告)号:JPH01242652A

    公开(公告)日:1989-09-27

    申请号:JP7117888

    申请日:1988-03-24

    Abstract: PURPOSE:To obtain a coating composition excellent in smoothness, friction reduction and running durability, by mixing a fluorinated alkyl or alkenyl (meth) acrylate monomer with a specified vinyl monomer and a specified perfluoropolyether. CONSTITUTION:This fluorinated coating composition comprises the following components A, B and C, wherein the amount of B is 0.001-40wt.% and the amount of C is 0.1-50wt.% both based on component A. (A): a copolymer comprising 3-80wt.% 5C or higher fluorinated alkyl or alkenyl methacrylate or acrylate monomer (a), 1-30wt.% functional group-containing vinyl monomer (b), and 1-96wt.% vinyl monomer (c) having an unsaturated group on its end and (B): a perfluoropolyether of formula I or II.

    FLUORINE-CONTAINING URETHANE-BASED COATING COMPOSITION

    公开(公告)号:JPH01223168A

    公开(公告)日:1989-09-06

    申请号:JP4936988

    申请日:1988-03-02

    Abstract: PURPOSE:To obtain the title composition capable of giving cured films of outstanding weatherability, stain and corrosion resistances, water repellency, etc., by blending an isocyanate compound and a specific fluorine-contg. copolymer with the glass transition temperature in a specified range. CONSTITUTION:The objective composition can be obtained by blending (A) a fluorine-contg. copolymer with a glass transition temperature of 30-60 deg.C, produced from (i) 3-30wt.% of a monomer of the formula [Rf is perfluoroalkyl with >=10 fluorine atoms.; n is 1 or 2; R is H or CH3], (ii) 3-30wt.% of a hydroxyl group-contg. vinyl monomer and (iii) 70-94wt.% of a unsaturated group-terminated vinyl monomer and (B) an isocyanate compound in the equivalent ratio NCO/OH=0.5-1.5.

    PRODUCTION OF POLYURETHANE RESIN
    95.
    发明专利

    公开(公告)号:JPS6414232A

    公开(公告)日:1989-01-18

    申请号:JP10062188

    申请日:1988-04-22

    Abstract: PURPOSE:To obtain the title resin being free of highly toxic volatile monomer and containing nonpungent compounds, by reacting 1,8-diisocyanato-4- isocyanatomethyloctane with acryl polyol at a specified ratio. CONSTITUTION:1,8-Diisocyanato-4-isocyanatomethyloctane is reacted with acryl polyol at an NCO to OH molar ratio of 0.5-2.0. In this way, the purpose polyurethane resin having a carbamide group concentration of 5X10 -50X10 mol per g of the reaction product and a crosslinking parameter of 150-1500 is obtained. Said trifunctional 1, 8-diisocyanato-4-isocyanatomethyloctane used is a new compound having a chemical structure of the formula. This compound has a low vapor pressure near room temperature, is not irritating to the human body and can be handled safely.

    RESIN COMPOSITION HAVING HIGH REFRACTIVE INDEX

    公开(公告)号:JPS63170401A

    公开(公告)日:1988-07-14

    申请号:JP202087

    申请日:1987-01-08

    Abstract: PURPOSE:To obtain the titled composition having long-period preservation stability and heat stability, not inhibiting initiator activity of polymerization initiator, free from problem of bad smell, by adding a specific polymerization initiator to a radically polymerizable polyfunctional vinyl monomer. CONSTITUTION:An aromatic ring-containing radically polymerizable polyfunctional vinyl monomer is blended with usually 0.01-1,000ppm N- nitrosophenylhydroxylamine salt compound shown by formula I (n is 1-4; X is metal or 1-4 valance or NH4). A di(meth)acrylate shown by formula II (R is H or CH3; X is Cl, Br or F; n is 0-4; m is 0-6; A is -SO2-, etc.) or an isocyanate modified monomer shown shown by formula III (R1 and R2 are CH3 or H; X is Cl, Br or F; Z is polyfunctional isocyanate residue; A is SO2; m and n are 0-4 and m+n=0-4; p is 0-4; q is 2 or 3) is preferable as the monomer.

    PREPARATIOM OF PLASTIC LENS
    97.
    发明专利

    公开(公告)号:JPS63166505A

    公开(公告)日:1988-07-09

    申请号:JP30993486

    申请日:1986-12-27

    Abstract: PURPOSE:To obtain an optically uniform plastic lens having an excellent appearance, by covering the outer circumference of a space held with a gasket and two glass molds with a heat insulating material at the time when a liquid curable compound is poured into the space. CONSTITUTION:Only an outer circumferential zone may be insulated on the upper face of the outer circumferential part formed with a gasket 2 and two glass molds 1, but the bottom face and side face parts are preferably wholely covered for heat insulation. By covering and heat-insulating it, a whole lens can be uniformly heated to obtain a lenz free of striae. As the heat insulating material, an asbestos foam or 4a polypropylene foam may be preferably used. The liquid curable compound to be poured has a refractive index of 1.50 or more and is an organic compound being formable into a crosslinked structure and containing 5 wt.% or more of a polyfunctional organic vinyl monomer containing an aromatic ring and being radically-polymerizable.

    PLASTIC LENS HAVING HIGH REFRACTIVE INDEX

    公开(公告)号:JPS6280602A

    公开(公告)日:1987-04-14

    申请号:JP22041885

    申请日:1985-10-04

    Abstract: PURPOSE:To form a plastic lens having high refractive index and >=35 Abbe's number and >=1.60 refractive index by constituting the lens of specified recurrent structural units as principal component. CONSTITUTION:A plastic lens is constituted of recurrent structural units expressed by the formula I as principal component. In the formula I, -CHmHnXp is a halogen-contg. aliphatic and/or halogen-contg. alicyclic group; R is H or methyl; X is a halogen atom except F; l is 1-3; m is 1-12; n+p is an integer 1-25. Since the plastic lens has >=1.60 refractive index, the thickness of the external periphery of the lens can be made thin. Further, since the lens has >=35 Abbe's number, the chromatic aberration of the lens is made smaller than the chromatic aberration of conventional lenses having high refractive index.

    PLASTIC LENS HAVING HIGH REFRACTIVE INDEX AND ITS PRODUCTION

    公开(公告)号:JPS6234102A

    公开(公告)日:1987-02-14

    申请号:JP17454485

    申请日:1985-08-08

    Abstract: PURPOSE:To obtain a lens having a high refractive index, superior formability and heat resistance by using a resin having specified three kinds of structural units as essential components and having a three-dimensional structure. CONSTITUTION:A composition contg. repeating units represented by formula I (where X is halogen other then F and m=1-5), formula II (where R is H or methyl, X is halogen other than F, Y is a unit represented by formula III, 3=3-5 and n=0-2) and formula IV [where R is H or methyl and A is a group represented by formula V (where R is H or methyl and n=1-10)] as essential components is copolymerized, and the resulting resin having a three- dimensional cross-linked structure is used to obtain a three-dimensional cross- linked structure is used to obtain a plastic lens. The preferred amount of the repeating units represented by the formulae I, II, IV are 20-85pts.wt., 5-70pts. wt. and 20-60pts.wt., respectively. The plastic lens has >=1.60 refractive index and >=35 Abbe's number and also has superior casting work efficiency, heat and shock resistances. The thickness of the peripheral part of the lens can be reduced and the lens has small chromatic aberration and superior post- workability.

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