C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/270, 402/59,
C08G 59/42 (2006.01) C08G 59/14 (2006.01) C09D 5/44 (2006.01)
Patent
CA 1185397
ABSTRACT The invention relates to binders for the formulation of electrophoretic coating compositions. The binders, which are water-dilutable upon partial or total neutralization with acids, are epoxy resin ester based, and are character- ized in that they are produced by n process in which the epoxy groups of a resin like compound with at least 2 1,2-epoxy groups per molecule and an epoxy equivalent of at least 160 are reacted completely at 60 - 75°C, in the presence of inert solvents, with a semi-ester of an aliphatic, cycloaliphatic or aromatic dicarboxylic acid and an N-2-hydroxyalkyl oxazolidine having the general formula Image R1 being a saturated or unsaturated aliphatic, cycloaliphatic or aromatic hydro- carbon radical, R2 being a straight chain or branched alkylene radical, R3 being a hydrogen atom or an alkyl radical and R4 being a hydrogen atom or an alkyl radical with up to 6 C-atoms and, optionally, together with further compounds for introducing additional crosslinking functions and/or other functions influ- encing film formation and/or film surface, the quantity of oxazolidine semi- ester being chosen such that the epoxy-fr?. final product has a theoretical amine number of at least 35, preferably 50 to 140 mg KOH/g.
363470
Bleikolm Anton
Leitner Wolfgang
Pampouchidis Georg
Fetherstonhaugh & Co.
Vianova Kunstharz Aktiengesellschaft
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