PRODUCTION OF HIGH-PURITY FLAME-RETARDANT EPOXY RESIN

PURPOSE:To obtain the subject resin having remarkably reduced rate of Br<-> elimination under boiling at high temperature by using an amino group- containing compound after the bromination of a novolak resin in the production of a brominated novolak resin to be used as a raw material. CONSTITU...

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Bibliographic Details
Main Authors KAJIWARA YOSHITAKA, MOGI SHIGERU, UEDA YOSHIHIKO, MORITA HIROMI, OTA MAKOTO
Format Patent
LanguageEnglish
Published 16.03.1990
Subjects
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOSITIONS BASED THEREON
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
SEMICONDUCTOR DEVICES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PURPOSE:To obtain the subject resin having remarkably reduced rate of Br<-> elimination under boiling at high temperature by using an amino group- containing compound after the bromination of a novolak resin in the production of a brominated novolak resin to be used as a raw material. CONSTITUTION:A novolak resin of formula (R is H or methyl; n is 0-10 on an average) is brominated with bromine in the presence of an amino group- containing compound and/or the brominated reaction product is treated with an amino group-containing compound after bromination. The obtained brominated novolak resin is made to react with an epihalohydrin in the presence of an alkali preferably at 40-80 deg.C to obtain the objective resin. The amino group-containing compound is e.g., hydrazine, methylamine or urea. The bromination reaction is carried out preferably at 10-50 deg.C.
Bibliography:Application Number: JP19890182527