Resin composition for coating
AssigneeKansai Paint Co., Ltd.
InventorsKoji Kamikado, Reiziro Nishida
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Abstract
The present invention provides a resin composition for coating, capable of forming a coating film excellent in electrodeposition property, coating surface smoothness and anticorrosivity in spite of small content of organic solvent and without containing a lead compound, and comprising a modified epoxy-polyamine resin (i), obtained by first reacting a diepoxide compound (a), wherein a specified amount of alkylene oxide has been introduced, and a bisphenol A type epoxy resin of an epoxy equivalent 170-500 with a bisphenol (b), reacting the epoxy resin (c) thus obtained with a cyclic ester (d), and further reacting the modified epoxy resin (e) thus obtained with an amine compound having active hydrogen.
Claims29
A resin composition for coating comprising a modified epoxy-polyamine resin (f), obtained by first reacting a diepoxide compound (a) selected from the group consisting of the compounds represented by the following general formulae (I) and (II)
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- wherein R1 represents a hydrogen atom or an alkyl group of 1-6 carbon atoms,
- m and n are respectively a number of 0 or more, and the sum of m and n is in the range of 1-20,
- x is an integer of 1-9,
- y is a number of 1-50,
- and a bisphenol A type epoxy resin of an epoxy equivalent 170-500 with a bisphenol (b), reacting the epoxy resin (c) thus obtained with a cyclic ester (d) represented by the following general formula (III)
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- wherein
- R2 represents a hydrogen atom or a methyl group,
- p is an integer of 3-6, and further reacting an amine compound containing active hydrogen to the modified epoxy resin (e) thus obtained.
Dependencies are inferred from the claim text.