Cationic, advanced epoxy resin compositions

Details Cationic, advanced epoxy resin compositions Cationic, advanced epoxy resin compositions

1986-07-18

1987-10-06

Nielsen, Earl

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

523415, 523416, 525510, 525528, 528103, C25D 1300, C08L 6300

Patent

active

046981411

ABSTRACT:
A method for preparing an advanced epoxy cationic resin from an epoxy-based resin containing oxirane groups by converting at least some of the oxirane groups to cationic groups, wherein the improvement is using as the epoxy-based resin an advanced epoxy resin obtained by reacting in the presence of a suitable catalyst (1) a diglycidylether of a polyetherpolyol, such as a condensation product of dipropylene glycol and epichlorohydrin having an epoxy equivalent weight of 185, (2) a diglycidylether of a dihydric phenol, for example a diglycidyl ether of bisphenol A and (3) a dihydric phenol such as bisphenol A and optionally a capping agent such as p-nonylphenol.
Coating compositions suitable for electrodeposition are prepared from the product obtained by the process.

REFERENCES:
patent: 4048179 (1977-09-01), Shen et al.
patent: 4182831 (1980-01-01), Hicks
patent: 4419467 (1983-12-01), Wismer et al.
patent: 4552814 (1985-11-01), Cavitt et al.
patent: 4608313 (1986-08-01), Hickner et al.
patent: 4610769 (1986-09-01), Bosso et al.

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