Coating thickening agent and preparation method thereof

Abstract

The invention discloses a coating thickening agent and a preparation method thereof. The coating thickening agent is prepared from 13kg of industrial grade acrylic acid, 3.5kg of methylacrylic acid, 5kg of emulsifying agent OP-10, 0.075kg of ammonium persulfate, 4kg of ammonium hydroxide, 10kg of 200# gasoline and 100kg of water. Preparation steps of the coating thickening agent include: stirring and dissolving 1 / 5 of water and the emulsifying agent OP-10; adding the industrial grade acrylic acid and the methylacrylic acid, and stirring mixture for 0.5 hour; then adding the ammonium persulfate, increasing the temperature to 70-80 DEG C, and reacting for 2 hours; adding the ammonium hydroxide for neutralizing to reach ph (potential of hydrogen) 7; stirring and simultaneously adding the 200# gasoline; finally, fast stirring at the speed of 1440r / min, then adding residual 4 / 5 of the water, and stirring the mixture to obtain a milk product. The novel thickening agent is prepared from the industrial grade acrylic acid, the methylacrylic acid, the emulsifying agent OP-10, the ammonium persulfate, the ammonium hydroxide, the 200# gasoline and the water. By the aid of the thickening agent, coating paste can be thickened, serous fluid is prevented from excessively permeating, film-forming properties are improved, later coating is facilitated, and the thickening agent can achieve thickening effects when the thickening agent interacts with alkali.

Description

technical field [0001] The invention belongs to the technical field of leather processing, and relates to a finishing thickener and a preparation method thereof. Background technique [0002] Leather dyeing is a very important process in the leather processing process. Almost all tanned leather needs to go through the process of leather dyeing, so as to realize the demand for leather products of different colors. However, traditional dyed leather often presents the defect of poor hand feeling. [0003] Authorized notification number CN 101845751B discloses a water-based environmental protection leather surface treatment hand oil, including polyurethane thickener; however, when the existing coating thickener is used, the film-forming performance cannot meet expectations due to the excessive penetration of the slurry, which affects to post-painting. Contents of the invention [0004] The object of the present invention is to provide a coating thickener and its preparation ...

AI Technical Summary

Problems solved by technology

However, the traditional dyed leather often has the defect of poor hand feeling.

[0003] Authorized notification number CN 101845751B discloses a water-based environmental protection leather surface treatment hand oil, including polyurethane thickener; however, when the existing coating thickener is used, the film-forming performance cannot meet expectations due to the excessive penetration of the slurry, which affects to post-finishing