Title:
UV硬化型液状ポリウレタン樹脂の製造法
Document Type and Number:
Japanese Patent JP3853351
Kind Code:
B2
Abstract:
(A) a polycarbonatediol, (B) a trifunctional alcohol, and (C) a diisocyanate are subjected to reaction in the presence of (D) a (meth)acrylate compound represented by the general formula CH2-CRCO(OCnH2n)pR' or CH2-CRCO(OCmH2m)qOCOCH-CH2, and (E) a di(meth)acrylate compound of alkylene glycol whose alkylene group is substituted as a lower alkyl group, and then (F) a hydroxyl group-containing (meth)acrylate is added to the resulting solution of urethane oligomers in (meth)acrylate to conduct terminal (meth)acrylating reaction of the urethane oligomers, thereby producing a UV-curable liquid polyurethane resin having a viscosity (25° C.) of preferably 150,000-1,000,000 mPa.s, where before or after the terminal (meth)acrylating reaction of the urethane oligomers (G) a photopolymerization initiator and (H) a hindered phenol-based antioxidant having a molecular weight of 500-2,000 are added thereto to form the UV-curable liquid polyurethane resin. The UV-curable liquid polyurethane resin can produce HDD gaskets, etc. in a cross-sectional shape with a good sealability by an automatic coating robot efficiently.
Inventors:
Tetsuya Watanabe
Chiba Takashi
Shuzo Yamada
Chiba Takashi
Shuzo Yamada
Application Number:
JP2005505296A
Publication Date:
December 06, 2006
Filing Date:
April 07, 2004
Export Citation:
Assignee:
UNIMATEC CO.,LTD.
NOK CORPORATION
NOK CORPORATION
International Classes:
C08G18/44; C08F290/06; C08G18/67; C09D175/16; F16J15/14; G11B31/00; H04N5/76; H04N5/782; H04N7/088
Domestic Patent References:
| JP63165418A | ||||
| JP6145276A | ||||
| JP892342A | ||||
| JP841147A |
Attorney, Agent or Firm:
Toshio Yoshida
Kazuko Yoshida
Kazuko Yoshida