Title:
【発明の名称】低比重で耐衝撃性の優れた光学材料、該光学材料を用いた光学成形体およびそれらの製法
Document Type and Number:
Japanese Patent JPH0826105
Kind Code:
B2
Abstract:
PURPOSE:To obtain the title optical material having high transparency, heat resistance and refractive index by casting a mixture of a bifunctional (meth) acrylate, an aromatic vinyl and a comonomer together with a radical polymerization initiator to a mold, gradually raising temperature, polymerizing and curing. CONSTITUTION:The objective optical material having low density and excellent impact strength, comprising a resin obtained by subjecting a polymerizable monomer mixture composed of (A) 30-80wt.% one or more of bifunctional (meth) acrylates (e.g. tetramethylene glycol dimethacrylate) shown by the formula (R<1>, R<2> and R<4> are H or CH3; n is 3-18 integer), (B) 20-70wt.% one or more aromatic vinyl monomers (e.g. styrene) and (C) 0-50wt.% one or more of polymerizable monomer (e.g. methyl methacrylate) having a polymerizable double bond and >=98 molecular weight and a polymerizable oligomer to radical polymerization.
Inventors:
Tatsuto Matsuda
Funae Yasuaki
Masahiro Yoshida
Tetsuya Yamamoto
Takemura Manabu
Funae Yasuaki
Masahiro Yoshida
Tetsuya Yamamoto
Takemura Manabu
Application Number:
JP31910890A
Publication Date:
March 13, 1996
Filing Date:
November 21, 1990
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
G02B1/04; C08F32/00; C08F212/00; C08F212/06; C08F220/28; C08F290/00; C08F290/06; C08F299/02; G11B7/24047; G11B7/2533; (IPC1-7): C08F290/06; G02B1/04; G11B7/24
Domestic Patent References:
| JP58201812A |
Attorney, Agent or Firm:
Ueki Kuichi
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