摘要:
Thermosetting bidder 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 beta-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 compound which is insoluble in liquid hydrocarbons. The compositions can be used in solvent-based lacquers and paints, in coating powders, aqueous powder suspensions, in aqueous coating compositions for cathodic electrodeposition; for aqueous compositions component (I) (1) is preferably an epoxy resin/amine adduct.
摘要:
Aqueous. powder suspensions for thermoset coatings are prepared by intimately blending a mixture of
(a) an epoxy resin/amine adduct having terminal amine groups; (b) a curing agent (phenolic resin, aminoplast resin, nonacidic polyester + transesterification catalyst), and (c) optionally a solid epoxy resin, the blend having a softening point of at least 70 °C, and milling down in water to a particle size below 20 micrometres.
摘要:
Water-thinnable curable binders for coatings are prepared by reacting a polyglycidyl ether of a polyhydric phenol with neutralized sulphanilic acid in a ratio of from 0.9 to 1.1 amino hydrogen equivalent per epoxy equivalent.
摘要:
Thermosetting bidder 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 beta-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 compound which is insoluble in liquid hydrocarbons.
The compositions can be used in solvent-based lacquers and paints, in coating powders, aqueous powder suspensions, in aqueous coating compositions for cathodic electrodeposition; for aqueous compositions component (I) (1) is preferably an epoxy resin/amine adduct.
摘要:
Thermosetting binders, in particular for aqueous can lacquers, are prepared by reacting an epoxy resin with an aliphatic amino acid (glycine, alanine, glutamic acid, taurine) in which at least 50% of the acid groups have been neutralized with a base (alkali metal hydroxide, tertiary amine or quaternary ammonium hydroxide).