摘要:
Resinous binders for cathodic electrodeposition, containing tertiary amino groups and derived from amines, diglycidyl ethers of dihydric phenols, are substituted by one or more groups derived from a glycidyl ester of a monocarboxylic acid, preferably an alpha-branched saturated aliphatic acid.
摘要:
Theromosetting binder composition for coating, comprising:
(I) (1) A non-acidic resinous compound, saturated, molecular weight at least 900, alcoholic hydroxyl content at least 0.2 eq./100 g;
(2) as cross-linking agent a non-acidic polyester of a polycarboxylic acid, having more than one β-hydroxyl ester group per molecule, at least one of components (1) and (2) having an alcoholic hydroxyl functionality of more than 2, and
(II) as curing catalyst a transesterification-promoting metal salt or complex which is soluble in liquid hydrocarbons.
For aqueous compositions component (I) (1) is preferably a neutralized epoxy resin/amine adduct and component (II) should be insoluble in water; the can be used for cathodic electrodeposition.
摘要:
Phenolic curing agents, in particular for powder coatings, are prepared by reacting a dihydric phenol (diphenyiol propane), a diepoxide (liquid diglycidyl ether of diphenylol propane), and a dicarboxylic acid (adipic acid) with the phenolic functionality in excess over the difference between the epoxy functionality and the acid functionality.
摘要:
Phenolic curing agents, in particular for powder coatings, are prepared by reacting a dihydric phenol (diphenyiol propane), a diepoxide (liquid diglycidyl ether of diphenylol propane), and a dicarboxylic acid (adipic acid) with the phenolic functionality in excess over the difference between the epoxy functionality and the acid functionality.