A non-sulfonated aqueous metal complex dye with low heavy metal content

Abstract

The invention relates to a non-sulfonated water-based metal complex dye with low heavy metal content, which comprises non-sulfonated metal complex toner, a water-miscible organic solvent, a surfactant and water, and is characterized in that it is ammonia water or organic alcohol Amines and carboxyl-containing resins are used as a new component in the dye to replace all or part of its surfactants, wherein the carboxyl-containing resin accounts for 20-60% of the mass of the dye after drying. The beneficial effects of the present invention are: when the dye is dried, the ammonia water or the organic alcohol amine will completely volatilize, and the resin left in the solid coating loses the effect of the surfactant because there is no hydrophilic amine salt end, and the coating meets water Or acid insoluble, so as to achieve the purpose of reducing the content of soluble heavy metals in the detection solution, which is safe and environmentally friendly; Therefore, the content of soluble heavy metals is naturally reduced during detection.

Description

technical field [0001] The invention belongs to the field of metal complex dyes, in particular to a non-sulfonated water-based metal complex dye with low heavy metal content. Background technique [0002] Under the general trend of energy saving and environmental protection, water-based wood coatings have been widely used in indoor wood products and furniture. The transparent colored coatings mainly use water-soluble dyes with sulfonic acid groups and metal complexes without sulfonic acid groups. compound dyes. Sulfonic acid-based water-soluble dyes are gradually discontinued due to their migration and light resistance in the coating film, and their color is dark. Metal complex dyes are widely used due to their excellent gloss retention, non-migration, and bright colors. Waterborne metal complex dyes in the prior art usually contain high-boiling-point surfactant components, and the surfactant will not volatilize during the coating drying process (drying temperature is not ...

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Problems solved by technology

[0004] From the above test method, it can be seen that: (1) the heavy metal test is based on the solid content of a certain amount of sample. When the number of heavy metal ions in the sample is constant, the higher the solid content of the test sample, the lower the test value; (2) when the water-based dye The easier it is to dissolve with water, the more heavy metals will be contained in the filtered solution to be tested, and the environmental protection of the product will be worse, resulting in the detection failing to meet the standard

At present, the water-based method (adding surfactant components) adopted by metal complex dyes solves the compatibility problem with water-based paints, but sacrifices the environmental protection advantages of the product itself, causing the environmentally friendly water-based paints to become heavy metals. Unsafe materials that seriously exceed the standard

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