Title:
【発明の名称】プラスチックレンズ
Document Type and Number:
Japanese Patent JP2851875
Kind Code:
B2
Abstract:
PURPOSE:To obtain the title lens material having high refractive index, excellent impact resistance and low specific gravity by blending a specific monomer with polyisocyanate compound and thiol compound, subjecting to thiourethanization reaction and radical polymerization reaction. CONSTITUTION:(A) A radically polymerizable unsaturated group-containing monomer having a thiol group or a hydroxyl group in the molecule is reacted with (B) a polyisocyanate compound containing plural isocyanate groups in the molecule, (C) a di-or trithiol compound and (D) a monomer containing an unsaturated monomer polymerizable with the component A and the component C and polymerized in the ratio wherein when total number of mols of thiol group or hydroxyl group of the component A is a, number of mols of isocyanate group of the component B is b and number of mols of thiol group of the component C is c, the value of b/c is <=1 and (a+b)/b is >=1.5 and the amount of the component D is 20-80wt.% based on the whole amounts to give the objective material.
Inventors:
SAKAGAMI TERUO
ARAKAWA NORYUKI
WATANABE NOBUHIRO
ARAKAWA NORYUKI
WATANABE NOBUHIRO
Application Number:
JP21410989A
Publication Date:
January 27, 1999
Filing Date:
August 22, 1989
Export Citation:
Assignee:
KUREHA KAGAKU KOGYO KK
International Classes:
G02C7/00; C08F290/00; C08F299/00; C08G18/38; C08G18/67; C08G18/72; C08G75/04; C08G75/045; G02B1/04; G02C7/02; (IPC1-7): G02B1/04; G02C7/02
Domestic Patent References:
| JP196208A | ||||
| JP222601A | ||||
| JP1163702A | ||||
| JP60199016A |
Attorney, Agent or Firm:
Masahiko Oi