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
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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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