Controlled film build epoxy coatings using glycidyl ethers of ox

Details Controlled film build epoxy coatings using glycidyl ethers of ox Controlled film build epoxy coatings using glycidyl ethers of ox

1991-10-25

1993-06-01

McCamish, Marion E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523404, 525524, 525525, 525528, C08K 320, C08F28300, C08G 5950, C08L 6302

Patent

active

052160459

ABSTRACT:
Advanced epoxy cationic resins are prepared from an epoxy-based resin containing oxirane groups by converting at least some of the oxirane groups to cationic groups is improved by using as the epoxy-based resin a blend of (I) an epoxy-based resin obtained by reacting in the presence of a suitable catalyst (1) a diglycidylether of an oxyalkylated aromatic or cycloaliphatic diol, such as a condensation product of bisphenol A, ethylene oxide and epichlorohydrin, optionally (2) a diglycidylether of a dihydric phenol, for example a diglycidyl ether of bisphenol A, (3) a dihydric phenol such as bisphenol A, and optionally (4) a capping agent such as p-nonylphenol and (II) a different cationic epoxy-based resin. Such resin blends can be utilized in cathodic electrodeposition coating systems. Use of the diglycidylether of an oxyalkylated diol provides coating compositions with lower viscosity and produces deposition coatings of higher film build and better surface appearance than compositions without this component.

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