Water resin composition for treating steel plate coated with aluminium-zinc alloy, its coating method and steel plate coated with aluminium-zinc alloy

A technology of water-based resin and zinc alloy, which is applied in the direction of superimposed layer plating, metal material coating process, coating, etc., can solve the problems of unfavorable environment, toxicity, and lack of alkali resistance of the coating, etc., and achieve improvement Adhesive effect

Active Publication Date: 2004-07-14
立邦(上海)化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, since such treating agents contain vanadium, their toxicity becomes a problem, and the treating agents substantially require etchants such as inorganic acids, organic acids, and fluorine compounds to ensure their performance, which is not environmentally friendly.
In addition, the resulting coating does not have sufficient alkali resistance
[0011] As described above, various treatment agents for steel sheets coated with aluminum-zinc alloys have been proposed, but there is no treatment agent capable of forming such a coating that has a high resistance to blackening. Excellent performance, high corrosion resistance and adhesion to the coating film, and the coating enables the coated steel plate to have high processing performance, so further research and development of the treatment agent is required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8 and comparative example 1-6

[0072] (Preparation of water-based resin composition for treating steel plate coated with aluminum-zinc alloy)

[0073] Anionic water-dispersible polyurethane, silane coupling agent and zirconium compound, its kind is shown in Table 1, according to the concentration of each solid matter shown in Table 1, join in the container with described order, stir The mixture was mixed for 5 minutes, and then the concentration of solid matter of the aqueous resin composition was adjusted to 25% by adding deionized water to obtain an aqueous resin composition for treating aluminum-zinc alloy plated steel sheets.

Embodiment 9-16

[0075] Anionic water-dispersible polyurethane, silane coupling agent, zirconium compound, crosslinking agent and wax, the kinds of which are shown in Table 1, in the stated order according to the concentration of each solid substance shown in Table 1 Added to a container, stirred the mixture for 10 minutes, and then adjusted the concentration of solid matter of the aqueous resin composition to 25% by adding deionized water to obtain an aqueous resin composition for treating aluminum-zinc alloy-coated steel sheets.

[0076] The types (a1-a5) of the anionic water-dispersible polyurethanes shown in Table 1 are as follows.

[0077] a1: SUPERFLEX 420 (water-dispersible polyurethane of polycarbonate, solid content 32%; produced by DAI-ICHI KOGYO SEIYAKU CO., LTD.)

[0078] a2: SUPERFLEX 150HS (water-dispersible polyurethane of polyester polyether, solid content 38%; produced by DAI-ICHI KOGYO SEIYAKU CO., LTD.)

[0079] a3: SUPERFLEX 110 (water-dispersible polyether polyurethane, s...

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Abstract

It is an object of the present invention to provide a water-borne resin composition for treating a steel sheet plated with an aluminum-zinc alloy which can be suitably applied to a steel sheet plated with an aluminum-zinc alloy and can impart the high ability to be processed, and the high corrosion resistance, resistance to blackening, weather resistance and adhesion to a coating film to the steel sheet and is also superior in the storage stability, a method of coating a steel sheet plated with an aluminum-zinc alloy using the same and a steel sheet plated with an aluminum-zinc alloy. A water-borne resin composition for treating a steel sheet plated with an aluminum-zinc alloy comprising an anionic water-dispersed polyurethane (a), a silane coupling agent (b) and a water-soluble zirconium compound (c) , said anionic water-dispersed polyurethane (a) having a glass transition temperature (Tg) of 50 DEG C or lower, and said water-soluble zirconium compound (c) being a substance, a pH of which becomes 7 to 11 in dissolving it in water, and having a pH of 7 to 10.

Description

technical field [0001] The present invention relates to an aqueous resin composition for treating a steel sheet coated with an aluminum-zinc alloy, a method of coating a steel sheet coated with an aluminum-zinc alloy, and a steel sheet coated with an aluminum-zinc alloy. Background technique [0002] A steel sheet coated with an aluminum-zinc alloy is generally a steel sheet coated with an alloy consisting of 4-75% by weight of aluminium, the balance mostly zinc and other trace elements silicon, magnesium, etc. [0003] At present, there are two kinds of steel plates coated with aluminum-zinc alloys that are actually used and commercialized, namely, a steel plate coated with low aluminum-zinc alloys, and the low aluminum-zinc alloys are composed of 4-10% by weight of aluminum, About 0.1% by weight of magnesium and the like and the balance being made of zinc, the other is a steel plate coated with a high aluminum-zinc alloy consisting of 55% by weight of aluminum, 43.4% by we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/00C09D5/08C09D175/04C09D191/06C23C22/00C23C22/60C23C22/66C23C28/00
CPCC23C2222/20C09D175/04C08L91/06
Inventor 当仲敦彦和田裕
Owner 立邦(上海)化工有限公司
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