Title:
PRODUCTION OF EPOXY RESIN
Document Type and Number:
Japanese Patent JP3760612
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To efficiently obtain the subject resin of increased α-glycol content that improves the processability, water resistance and corrosion resistance by increasing the content of α-glycol in the macromolecular epoxy resin and is useful as a coating and the like with excellent productivity by treating the epihalohydrin with dilute alkali before the reaction thereof with polyfunctional phenol.
SOLUTION: An aqueous solution of an alkali metal hydroxide in a 1-20% concentration is added to epihalohydrin to effect the reactions, then the water layer in the reaction system is removed to obtain a mixture of epihalohydrin and glycidol. Subsequently, the reaction mixture is mixed with a polyfunctional phenol and an aqueous alkali metal hydroxide solution of 5-50% concentration for the reaction. In a preferred embodiment, the a glycol content of the resultant resin is 0.10-0.50 meq/g.
Inventors:
Hideya Suzuki
Keiichi Hamanaka
Kazuyuki Onodera
Keiichi Hamanaka
Kazuyuki Onodera
Application Number:
JP34910697A
Publication Date:
March 29, 2006
Filing Date:
December 18, 1997
Export Citation:
Assignee:
Dainippon Ink and Chemicals Co., Ltd.
International Classes:
C08G59/06; (IPC1-7): C08G59/06
Attorney, Agent or Firm:
Kono Tsuyo
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