Title:
PREPARATION OF NOVEL TETRACARBOXYLIC ANHYDRIDE
Document Type and Number:
Japanese Patent JPS5569572
Kind Code:
A
Abstract:
PURPOSE: To obtain the title compound usable as a raw material for epoxy, polyimide, and polyamide resins in high yield, by reacting methyl-tetrahydrophthalic anhydride with sulfur mono- or dichloride.
CONSTITUTION: One mole of methyltetrahydrophthalic anhydride is reacted with 0.3W1mol, preferably 0.5W0.7mol, of sulfur mono- or dichloride in an inert solvent at 0W100°C, preferably 20W80°C, to give a low-melting tetrahydrocarboxylic anhydride of the formula (n is 1 or 2), (m.p.≤100°C).
USE: Epoxy resin hardeners having improved oprating efficiency, due to good compatibility with epoxy nesins at low temperatures.
Inventors:
YAMATO MOTOTOSHI
NATSUUME IKUO
NATSUUME IKUO
Application Number:
JP14159478A
Publication Date:
May 26, 1980
Filing Date:
November 16, 1978
Export Citation:
Assignee:
NIPPON ZEON CO
International Classes:
C07D307/89; (IPC1-7): C07D307/89