Method for recycling waste paint slag of water-soluble paint

A water-soluble, paint-based technology, applied in the direction of coating, etc., to achieve the effect of recycling, good economic and environmental benefits
CN104893398AActive Publication Date: 2015-09-09YONGKANG HONGYI TRADE
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
YONGKANG HONGYI TRADE
Publication Date
2015-09-09

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Abstract

The invention discloses a method for recycling waste paint slag of water-soluble paint. The method comprises the following steps of: (1) collecting a mixed paint slag solution, adjusting the pH value to be 3-5, standing for 12-24 hours, filtering and taking filter residue, adjusting the pH value of the filter residue to be 8-11, standing for 2-3 hours, filtering and collecting filtrate and filter residue respectively, drying the filter residue to obtain recycled pigment, and concentrating the filtrate to obtain a recycled resin solution; and (2) compounding the recycled pigment and the recycled resin solution with a dispersing agent, grinding resin, a water-soluble alcohol solvent, deionized water, a defoaming agent, a thickening agent and a pH regulator to obtain regenerated water-soluble paint. According to the method disclosed by the invention, pigment particles and resin which are dispersed into an emulsion system are settled by a demulsification method by adjusting the pH value, and the resin is separated from the pigment particles from the sediment by utilizing the alkali solubility characteristic of the resin, so that the pigment particles and the resin component are recycled, and the recycled pigment particles and the recycled resin component are further applied to production of water-soluble paint products with the same physicochemical properties and application performance.
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Description

technical field

[0001] The invention relates to a recovery process of waste paint slag, in particular to a recycling method for waste paint slag of water-soluble paint. Background technique

[0002] Water-based paint (water-based paint), as an environmentally friendly paint with low volatile organic compounds (VOC), has important environmental benefits and economic value in replacing organic solvent-based paints in industries such as machinery, automobiles, and hardware. In developed countries, the utilization rate of water-based paint has reached more than 80%. With the increasingly serious problem of environmental pollution in our country, and the promulgation and continuous improvement of new environmental protection laws and related regulations, the use of water-based paint in various industries in our country will also increase.

[0003] During paint spraying operations, the effective application efficiency of paint is limited. Under normal circumstances, when using a...

Claims

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