Title:
A hardening agent of an epoxy resin, a process, and its use
Document Type and Number:
Japanese Patent JP6052868
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a novel epoxy resin curing agent which has high flame retardancy, high heat resistance and high flow property, and a composition and a cured product using the same.SOLUTION: An epoxy resin curing agent is composed of a mixed product, which is obtained by mixing a phenolic compound having a hydroxyl equivalent of 50-250 g/eq and a 150°C melt viscosity of 50-500 mPa s and having two or more phenolic hydroxyls in one molecule, a bismaleimide compound represented by general formula (1), and a dihydroxynaphthalene compound represented by general formula (3) at a weight ratio of the bismaleimide compound to the phenolic compound of 0.5-5.0 and a weight ratio of the dihydroxynaphthalene compound to the phenolic compound of 0.1-1.0 and in a temperature range of 100-200°C. The mixed product has a 150°C melt viscosity of 50-500 mPa s and a hydroxyl equivalent of 250-400 g/eq.
Inventors:
Wataru Takahashi
Application Number:
JP2012252154A
Publication Date:
December 27, 2016
Filing Date:
November 16, 2012
Export Citation:
Assignee:
Air Water Inc.
International Classes:
C08G59/40; C08G59/62; C08L63/00; H01L23/14; H01L23/29; H01L23/31
Domestic Patent References:
| JP2000086745A | ||||
| JP2004168930A | ||||
| JP5331263A | ||||
| JP2008063371A | ||||
| JP7090054A |
Attorney, Agent or Firm:
Naozumi Ono
Shigemitsu Nakajima
Shigemitsu Nakajima