Epoxy phosphate ester resin, its production and coating composition containing the resin

U.S. Patent Number: 5389704

Abstract: The present invention provides a process for preparing an epoxy phosphate ester resin, which comprises (1) reacting an epoxy resin having an average of greater than one vicinal epoxy group with a phosphoric acid source material to obtain an epoxy phosphate ester; and (2) further reacting the obtained epoxy phosphate ester with a phosphoric acid source material. The present invention provides epoxy phosphate ester resins obtained by the above process, which exhibit good water-solubility. The coating compositions containing such epoxy phosphate ester resin show good coating properties such as good corrosion resistance, chemical resistance, heat resistance and flexibility.

Inventors: Yabu; Yoshimitsu (Gotemba, JP)

Assignee: The Dow Chemical Company (Midland, MI)

Application Number: 08/090,027

Issued: 1995-02-14

Expired: 2007-02-14

Classes: 523/406 ; 523/409; 523/433; 523/451; 528/108; 528/398; 528/89

Field of search: 528/89,108,398 523/433,451,414,406,409

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