US 4,251,414 AGranted

Cathodic sediment type of electrodeposition paint position

AssigneeNippon Soda Co., Ltd.

InventorsHisao Nakada, Michisuke Harada, Yukio Yamase, Ryuji Matsui

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Abstract

A cathodic sediment type of electrodeposition paint composition which consists of an aqueous medium, a resinous binder dissolved or dispersed therein and an accelerating catalyst. The resinous binder is an acid neutralized reaction mixture of a first and a second component in a weight ratio of 99 to 20 parts of the first component to 1 to 80 parts of the second component. The first component is an addition material of a polybutadiene terminating in an epoxy group and a primary or secondary amino compound. The second component is an addition material of an epoxy resin and a primary or secondary amino compound. The accelerating catalyst is selected from the group consisting of an oleosoluble organic acid salt of a transition metal, the metal in turn being selected from the group consisting of iron, vanadium and titanium.

A cathodic sediment type of electrodeposition paint composition which comprises using as a main component an addition material made of a butadiene polymer having an epoxy group and an amino compound as a first component and an addition material of epoxy resin or a modified epoxy resin and an amino compound as a second component, wherein, said butadiene polymer having an epoxy group consists of material selected from the group consisting of:

(A) a butadiene homopolymer having an epoxy group at the terminal of the polymer chain, or a butadiene copolymer consisting of 30 to 100 weight percent of butadiene as a constituent of the polymer chain and 70 to zero weight percent of .alpha.-methyl styrene or styrene,
(B) a derivative of a butadiene polymer having an epoxy group at the terminal part or the intramolecular part of the polymer chain obtained by treating the aforementioned butadiene homopolymer or butadiene copolymer with an organic peroxide, and,
(C) a butadiene polymer having an epoxy group at the intramolecular part of the polymer chain produced by treating the aforementioned butadiene homopolymer or copolymer by a polymerization process with an organic peroxide;
said amino compound used in both said first and second components consists of material selected from the group consisting of mono- or di-alkylamines, including propylamine, butyle amine, diethyl amine, dipropylamine, alkanol amines including ethanol amine, diethanol amine, dipropanol amine, mono or polyalkylene polyamines including ethylene diamine, propylene diamine, hexamethylene diamine, diethylene triamine, triethylene tetramine N-amino ethanol amine and diethyl aminopropyl amine;
and, the modified epoxy resin consisting of the aforementioned epoxy resins reacted with a cresol, novolak type of resin, or a bisphenol type, and an alkylene oxide having 1 to 4 carbon atoms with an an addition reaction step;
said first and second components being homogeneously chemically bonded by using about 99% to about 20% of the first component to about 1% to about 80% by weight of the second component, the amino compound having from about 50% to 95% by weight of amine equivalent in proportion to the equivalent epoxy group.

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Abstract

Claims17