Title:
PRODUCTION OF EPOXY RESIN, AND EPOXY RESIN COMPOSITION
Document Type and Number:
Japanese Patent JPH04272919
Kind Code:
A
Abstract:
PURPOSE:To provide an epoxy resin excellent in resistance to heat and water, and a flame-retardant epoxy resin compsn. giving a stable prepreg and a heat- resistant cured article. CONSTITUTION:A mixture of a brominated phenol novolac epoxy resin with a nonbrominated bisphenol A epoxy resin is reacted with a brominated bisphenol A to give an epoxy resin wherein the above two epoxy resins are grafted onto each other through the bisphenol A. An epoxy resin compsn. contg. the resulting epoxy resin and a curing agent is impregnated into a glass cloth and dried to give a prepreg, which is highly stable and shows only a little reduction in gel time even after being stored for 7 days. Moreover, the resin compsn. gives a cured article having a higher heat resistance than conventional epoxy resin compsn.
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Inventors:
MORIYAMA HIROSHI
YAMAMOTO MITSURU
YOSHIZAWA MASAKAZU
EBARA TOSHIHARU
YAMAMOTO MITSURU
YOSHIZAWA MASAKAZU
EBARA TOSHIHARU
Application Number:
JP3405691A
Publication Date:
September 29, 1992
Filing Date:
February 28, 1991
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS
International Classes:
C08G59/14; C08G59/30; (IPC1-7): C08G59/14; C08G59/30
Attorney, Agent or Firm:
Takahashi victory