Title:
SELF-EMULSIFIABLE EPOXY RESIN AND ITS COMPOSITION
Document Type and Number:
Japanese Patent JP3185051
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an epoxy resin composition which is excellent in emulsion stability and gives a cured film excellent in corrosion resistance and water resistance by reacting a compound having terminal isocyanato groups with an epoxy resin to give a reaction product having an oxazolidone ring in the molecule and a specified epoxy equivalent.
SOLUTION: The compound having terminal isocyanato groups is obtained by reacting a polyalkylene glycol compound with a polyisocyanate compound at an equivalent ratio of isocyanato groups to hydroxyl groups of (1.5 to 3.0):1. The molecular weight of the polyalkylene glycol compound used is 500 to 15,000. The polyisocyanate compound comprises, e.g. 2,4-tolylene diisocyanate. The epoxy resin used has at least two epoxy groups in the molecule and comprises, e.g. bisphenol A epoxy resin. The specified epoxy equivalent mentioned above is 250-10,000 g/eq. The epoxy resin and the compound having terminal isocyanato groups are reacted at an equivalent ratio of epoxy groups to isocyanato groups of (1.5 to 5.0):1 at 110-200°C for 1 to 10 hr.
Inventors:
Kazuhiko Yoshida
Yasuyuki Takeda
Yasuyuki Takeda
Application Number:
JP8104497A
Publication Date:
July 09, 2001
Filing Date:
March 31, 1997
Export Citation:
Assignee:
Toto Kasei Co., Ltd.
International Classes:
C08L63/00; C08G18/10; C08G18/58; C08G59/14; C08G59/50; (IPC1-7): C08G18/58; C08G59/14; C08L63/00
Domestic Patent References:
| JP5035232A | ||||
| JP786463A |
Attorney, Agent or Firm:
Hiroshi Tanaka (1 outside)