公开(公告)号：JPH10110084A

公开(公告)日：1998-04-28

申请号：JP26722196

申请日：1996-10-08

Applicant: KYOWA YUKA KK

Inventor： MATSUSHITA SEISHIROU ,  SHIMIZU IKUO ,  IKUTA MASANORI ,  HOTTA IWAO ,  ITANI IZUMI

IPC: C08L33/14 ,  C08F220/38

Abstract: PROBLEM TO BE SOLVED: To provide an ultraviolet-curing cross-linker which contains a compd. having two 5-member-cyclic dithiocarbonate groups and obtd. by reacting a corresponding oxirane compd. with carbon disulfide and which is useful for coating materials, adhesives, and ink. SOLUTION: This cross-linker contains a compd. having two 5-member-cyclic dithiocarbonate groups represented by the formula (wherein R1 and R2 are each a lower alkyl group provided they may combine with each other to form a satd. hydrocarbon ring). This compd. is obtd. by reacting a polyhydroxy compd., such as a polyhydric phenol (e.g. bisphenol A) or a low-mol.-wt. alcohol (e.g. glycerin), with epichlorohydrin and reacting the resultant oxirane compd., such as a polyvalent glycidyl ether or glycidyl methacrylate, with carbon disulfide in the presence of LiBr, etc. An acrylic monomer having a 5-member-cyclic dithiocarbonate group can form a copolymer with other copolymerizable monomers. This cross-linker is used jointly with a photosensitizer, a pigment, a thickener, etc., in accordance with the purpose.

公开(公告)号：JP2002234259A

公开(公告)日：2002-08-20

申请号：JP2001036632

申请日：2001-02-14

Applicant: RICOH KK ,  KYOWA HAKKO KOGYO KK ,  KYOWA YUKA KK

Inventor： NOGUCHI SO ,  SATO TSUTOMU ,  TOMURA TATSUYA ,  SHIMIZU IKUO ,  TOYODA HIROSHI ,  KINUGASA MOTOHARU ,  YAMADA SHIHO ,  IKUTA MASANORI ,  MUTO KENJI

IPC: B41M5/26 ,  B32B9/00 ,  B32B15/08 ,  B32B15/20 ,  C07D209/14 ,  C07D209/88 ,  C07D401/12 ,  C07D403/08 ,  C07D417/12 ,  C07D455/04 ,  C07D487/04 ,  C09B23/00 ,  C09B45/00 ,  C09B45/14 ,  C09B45/18 ,  C09B45/20 ,  C09B45/22 ,  C09B57/00 ,  G11B7/0045 ,  G11B7/24 ,  G11B7/244 ,  G11B7/258

Abstract: PROBLEM TO BE SOLVED: To provide a recording material, contained in an optical recording medium, which can be applied to a DVD-R disc system using a semiconductor laser having an oscillated wave length on the short wave length side, compared to a conventional system and especially shows outstanding light resistance and shelf stability in the optical recording medium using a conventional squalirium coloring matter as well as a recording method using the recording material. SOLUTION: In the optical recording medium with a recording layer formed on a substrate, the recording layer contains a squalirium compound and at least one kind each of an azo compound represented by formula (I) (wherein, A and B are independently a residue forming an aromatic ring which may have a substituent group or a heterocycle which may have a substituent group, together with a carbon atom with which the residue is bonded; and X is a substituent group having an active hydrogen group) and an azo metal chelate compound comprising a metal.

公开(公告)号：JP2001322356A

公开(公告)日：2001-11-20

申请号：JP2001036663

申请日：2001-02-14

Applicant: RICOH KK ,  KYOWA HAKKO KOGYO KK ,  KYOWA YUKA KK

Inventor： NOGUCHI SO ,  SATO TSUTOMU ,  TOMURA TATSUYA ,  SASA NOBORU ,  UENO YASUNOBU ,  AZUMA YASUHIRO ,  SHIMIZU IKUO ,  TOYODA HIROSHI ,  KINUGASA MOTOHARU ,  YAMADA SHIHO ,  IKUTA MASANORI ,  MUTO KENJI

IPC: B41M5/26 ,  C09B23/00 ,  C09B45/00 ,  G11B7/24 ,  G11B7/244 ,  G11B7/258

Abstract: PROBLEM TO BE SOLVED: To provide a recording technique, which is excellent in light resistance and storage stability, in an optical recording medium, which is applicable for an DVD-R disc system using a semiconductor laser having an oscillating wave length in a short wave length and in which a conventional squalilium coloring matter is employed. SOLUTION: In this optical recording medium, in which at least a recording layer is provided on a substrate, the recording layer includes respectively at least one kind of the squalilium compound and of an azo-metallic chelate compound consisting of a metal and an azo-compound represented by general formula (I), in which A represents a residue, which forms a heterocycle together with a carbon atom and a nitrogen atom bonding therewith, B represents a residue, which forms an aromatic ring or a heterocycle togetherwith two carbon atoms bonding therwith, and X represents a sustituent with an active hydrogen.

公开(公告)号：JPH11246632A

公开(公告)日：1999-09-14

申请号：JP5397598

申请日：1998-03-05

Applicant: KYOWA YUKA KK

Inventor： JINBO SHINICHIRO ,  MATSUSHITA SEISHIROU ,  SHIMIZU IKUO ,  HOTTA IWAO ,  IKUTA MASANORI ,  ITANI IZUMI

IPC: C08K5/17 ,  C08F220/38 ,  C08F230/08 ,  C08L33/14 ,  C09D133/14

Abstract: PROBLEM TO BE SOLVED: To obtain the subject copolymer having a rapid hardening rate, manifesting high hardness, water resistance, chemical resistance or the like and useful for uses such as a coating material by allowing the copolymer to include a specified 5-membered cyclic dithiocarbonate group and a specific group. SOLUTION: The objective copolymer contains a 5-membered cyclic dithiocarbonate group of formula I (R to R are each H or a lower alkyl) and a group of formula II (R to R are each H, an alkyl, an aralkyl, a halogen, an alkoxy, an amino or the like). The copolymer is obtained, for example, by copolymerizing (A) 0.1-50 wt.% vinyl-based monomer having the group of formula I, (B) 0.1-30 wt.% vinyl-based monomer having the group of formula II and (C) a vinyl-based monomer copolymerizable with these monomers. The component A is preferably a monomer of formula III [R is H, methy] or ethyl; (n) is 1-6]. Preferably, γ-methacryloxypropyltrimethoxysilane or the like is used as the component B.