Title:
AROMATIC POLYMER, OPTICAL TRANSPARENT MEMBER UTILIZING SAME AND PRODUCTION OF SAME
Document Type and Number:
Japanese Patent JPH02251527
Kind Code:
A
Abstract:
PURPOSE:To obtain the subject polymer having both high refractive index and heat resistance, thus useful as a raw material for optical lens by reaction between each specific pyridine and phenylmethane in the presence of an alkali metal compound. CONSTITUTION:A reaction is carried out in an organic solvent in the presence of an alkali metal compound between (A) a 2,6-dihalogenopyridine of formula l (X<1> and X<2> are each halogen) and (B) a 4,4'-dihydroxytetraphenylmethane of formula II (R<1>-R<4> are each H, halogen, 1 to 4C alkyl, phenyl or cyclohexyl), thus obtaining the objective polymer made up of recurring unit of formula III >=0.1dl/g in reduced viscosity in the form of its p-dichlorobenzene solution at a concentration of 0.2 g/dl at 60 deg.C.
Inventors:
BANDO TORU
Application Number:
JP7237389A
Publication Date:
October 09, 1990
Filing Date:
March 24, 1989
Export Citation:
Assignee:
IDEMITSU KOSAN CO
International Classes:
G02B1/04; C08G65/40; (IPC1-7): C08G65/40; G02B1/04
Attorney, Agent or Firm:
Naoki Fukumura
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