C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/5904, 204/97
C08G 59/16 (2006.01) C08G 59/06 (2006.01) C08G 59/22 (2006.01) C08G 59/30 (2006.01) C09D 5/44 (2006.01) C25D 13/06 (2006.01)
Patent
CA 1325858
ABSTRACT OF THE DISCLOSURE 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 improve- ment is using as the epoxy-based resin an advanced epoxy resin obtained by reacting in the presence of a suitable catalyst (1) diglycidylether of an aliphatic diol which is essentially free of ether oxygen atoms, such as a diglycidyl ether of 1,4-butanediol, (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 electro- deposition are prepared from the product obtained by the process.
542364
Hickner Richard A.
Rao Nancy A.
Smart & Biggar
The Dow Chemical Company
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