FORMATION OF POLYMERIZED FILM ON LIQUID CRYSTAL CELL SUBSTRATE

    公开(公告)号:JP2001051276A

    公开(公告)日:2001-02-23

    申请号:JP2000208722

    申请日:2000-07-10

    Abstract: PROBLEM TO BE SOLVED: To form a polymerized film, which controls interaction between a substrate and a liquid crystal, on a cell substrate by incorporating a divinyl compound into the liquid crystal and photopolymerizing the divinyl compound on a cell substrate by being irradiated with light from a transparent substrate side. SOLUTION: A polymerized film is formed on a liquid crystal cell substrate in which a liquid crystal is encapsulated between two substrates at least one of which is a transparent substrate. For this purpose, a divinyl compound is incorporated into the liquid crystal and photopolymerized on the substrate by being irradiated with light from the side of the transparent substrate. The used divinyl compound has two vinyl groups in its molecule and is a low molecular weight compound having a molecular weight of 1,000 or lower, preferably 400 or lower. The lower limit of the molecular weight is normally about 250. The divinyl compound expressed by the formula is preferably used. In the formula, A denotes a linear molecule backbone part and R3-R8 each denotes hydrogen or a substituent. The linear molecule backbone part A includes a linear bivalent aliphatic group and the like.

    NEW DIVINYL COMPOUND AND ITS PRODUCTION

    公开(公告)号:JPH11322690A

    公开(公告)日:1999-11-24

    申请号:JP14213298

    申请日:1998-05-08

    Abstract: PROBLEM TO BE SOLVED: To produce a new divinyl compound capable of forming a three- dimensional network structure capable of manifesting high secondary nonlinear optical characteristics and useful as an organic secondary nonlinear optical material by carrying out a photopolymerization while applying an electrical field. SOLUTION: This compound is represented by formula I [R is H or methyl; R is a lower alkyl; (n) is 4-8], e.g. 4-biphenylphenyl 4'-[N-(6- methacryloyloxyhexyl)-N-methylamino]-azobenzene-4-carboxylate. The compound represented by formula I is produced by reacting a compound represented by formula II (e.g. N-methacryloyloxyhexyl-N-methylaniline) with 4-aminobenzoic acid and a nitrite such as sodium nitrite, forming an azo compound represented by formula III e.g. 4'-[N-(6-methacryloyloxyhexyl)-N-methylamino]-azobenzene-4- carboxylic acid}, then converting the resultant compound into an acid halide and subsequently reacting the prepared acid halide with p-vinylphenol.

    CIRCUMFERENTIAL WELDING METHOD OF STEEL PIPE CLAD WITH CU-NI ALLOY

    公开(公告)号:JPH0647551A

    公开(公告)日:1994-02-22

    申请号:JP22099492

    申请日:1992-07-29

    Abstract: PURPOSE:To circumferentially weld steel pipes clad with Cu-Ni alloys to each other on one side from the outer peripheral side. CONSTITUTION:Beads of single layer or plural layers are formed side by using a welding material of the same material as that of the material to be welded having the same compsn. as the compsn. of cladding metals 2 or the compsn. analogous therewith at the time of joining the steel pipes clad with the Cu-Ni alloys as the cladding metals 2 to each other. The beads of the single layer or plural layers are then formed on the upper layer thereof by using an Cu-Ni alloy or Ni-Cr-Mo alloy welding material, by which these steel pipes are circumferentially welded. Then, the steel pipes clad with the Cu-Ni alloys are efficiently joined to each other by one-side welding; in addition, the excellent weldability is obtd.

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