Title:
RESIN COMPOSITION FOR OPTICAL MATERIAL
Document Type and Number:
Japanese Patent JPH03121108
Kind Code:
A
Abstract:
PURPOSE:To provide the title composition having a low specific gravity and excellent transparency, heat resistance, impact resistance, etc., by mixing a specified N-substituted phenylmaleimide with a diphenic acid derivative and a bisphenol A derivative in a specified weight ratio. CONSTITUTION:A resin composition for optical materials is produced by mixing 1-50wt.% N-substituted phenylmaleimide of formula I wherein X is H, a 1-5C aliphatic group, an aromatic group or a halogen atom; and a is 1-5 with 5-50wt.% diphenic acid derivative of formula II wherein X is H or a methyl and 1-30wt.% bisphenol A derivative of formula III wherein X and Y are each H or a methyl; and a+b=2-50, as the essential components. The refractive index, crosslinking density, etc., of the resin composition can be controlled by further adding a monomer having a radical-polymerizable functional group containing a C-C double bond in the molecule (e.g. styrene or phenyl acrylate) to the composition.
Inventors:
KASHIWAGI HISAZUMI
MAEDA KOICHI
TAKIGAWA AKIO
MAEDA KOICHI
TAKIGAWA AKIO
Application Number:
JP18657690A
Publication Date:
May 23, 1991
Filing Date:
July 13, 1990
Export Citation:
Assignee:
NIPPON SHEET GLASS CO LTD
International Classes:
C08F218/16; C08F18/14; C08F20/10; C08F22/36; C08F220/30; C08F222/40; (IPC1-7): C08F218/16; C08F220/30; C08F222/40
Attorney, Agent or Firm:
Ohno Seiichi