阅读说明：本技术 一种槽液稳定性好的水溶性电泳漆及其制备工艺 (Water-soluble electrophoretic paint with good bath solution stability and preparation process thereof ) 是由 李小记 张永海 盘圣东 冯贵学 于 2021-10-19 设计创作，主要内容包括：本发明提供了一种槽液稳定性好的水溶性电泳漆及其制备工艺,该水溶性电泳漆由如下配比的原料制成：双酚A型环氧树脂30-40份,中和剂6-10份,助溶剂10-15份,颜料5-10份,去离子水15-20份,混合分散剂3-5份。本发明通过在电泳漆制备的同时加入由表面活性剂所混合而成的混合分散剂,不仅够在该电泳漆使用时使得电泳漆中的颜料分散更加均匀,而且能够显著提高电泳漆在使用时的稳定度,有效确保了该电泳漆的使用效果,便于大规模推广应用。(The invention provides a water-soluble electrophoretic paint with good bath solution stability and a preparation process thereof, wherein the water-soluble electrophoretic paint is prepared from the following raw materials in parts by weight: 30-40 parts of bisphenol A epoxy resin, 6-10 parts of a neutralizer, 10-15 parts of a cosolvent, 5-10 parts of a pigment, 15-20 parts of deionized water and 3-5 parts of a mixed dispersant. According to the invention, the mixed dispersant formed by mixing the surfactants is added while the electrophoretic paint is prepared, so that the pigment in the electrophoretic paint can be dispersed more uniformly when the electrophoretic paint is used, the stability of the electrophoretic paint in use can be obviously improved, the use effect of the electrophoretic paint is effectively ensured, and the electrophoretic paint is convenient for large-scale popularization and application.)

1. The water-soluble electrophoretic paint with good bath solution stability is characterized in that: the water-soluble electrophoretic paint is prepared from the following raw materials in parts by weight: 30-40 parts of bisphenol A epoxy resin, 6-10 parts of a neutralizer, 10-15 parts of a cosolvent, 5-10 parts of a pigment, 15-20 parts of deionized water and 3-5 parts of a mixed dispersant.

2. The water-soluble electrophoretic paint with good bath solution stability according to claim 1, wherein: the preferable mixture ratio of the water-soluble electrophoretic paint is as follows: 35-40 parts of bisphenol A epoxy resin, 6-8 parts of a neutralizer, 10-12 parts of a cosolvent, 5-8 parts of a pigment, 15-18 parts of deionized water and 4-5 parts of a mixed dispersant.

3. The water-soluble electrophoretic paint with good bath solution stability according to claim 1, wherein: the cosolvent is tert-butyl alcohol.

4. The water-soluble electrophoretic paint with good bath solution stability according to claim 1, wherein: the mixed dispersing agent is prepared by mixing ammonium stearate, lauric acid diethanolamide and monoalkoxytitanate according to the proportion of 0.5:0.1: 0.3.

5. The process for preparing a water-soluble electrodeposition paint with good bath stability according to any one of claims 1 to 4, wherein: the method comprises the following steps:

step (1): mixing and stirring the pigment and the mixed dispersant according to the corresponding proportion, drying the mixed materials, and then porphyrizing the materials in an agate pot;

step (2): sieving the dried material with 20 μm sieve, introducing bisphenol A type epoxy resin into the sieved material, and refining for 3-5 times on a double-drum plastic refining machine to uniformly disperse the powder;

and (3): and (3) adding a neutralizing agent, a cosolvent and deionized water into the refined powder in the step (2), mixing and stirring until the mixture is uniformly mixed, so that the water-soluble electrophoretic paint can be prepared.

Technical Field

The invention belongs to the technical field of preparation of water-soluble electrophoretic paint, and particularly relates to water-soluble electrophoretic paint with good bath solution stability and a preparation process thereof.

Background

Electrophoretic paints, also called electrophoretic paints, begin to become more and more popular as the defects of conventional spraying continue to emerge; electrophoretic paints are also starting to be updated continuously, from anode electrophoretic paints to cathode electrophoretic paints, from single-component electrophoretic paints to two-component electrophoretic paints, the development of electrophoretic paints also promotes the development of electrophoretic coating, so that more products do not use spraying technology but use electrophoresis.

However, the current electrophoretic paint is mainly prepared by mixing resin, neutralizer, cosolvent, pigment and deionized water in the preparation process, and the pigment granularity and dispersity in the electrophoretic paint are not controlled effectively in the preparation process, so that the dispersion uniformity of the pigment in the finally prepared electrophoretic paint is poor, the stability of the bath solution of the electrophoretic paint is greatly reduced, and the electrophoretic paint is not convenient to use stably for a long time.

Disclosure of Invention

In view of the above, the invention aims to provide a water-soluble electrophoretic paint with good bath solution stability and a preparation process thereof.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a water-soluble electrophoretic paint with good bath solution stability is prepared from the following raw materials in parts by weight: 30-40 parts of bisphenol A epoxy resin, 6-10 parts of a neutralizer, 10-15 parts of a cosolvent, 5-10 parts of a pigment, 15-20 parts of deionized water and 3-5 parts of a mixed dispersant.

Further, the water-soluble electrophoretic paint is preferably prepared from the following components in percentage by weight: 35-40 parts of bisphenol A epoxy resin, 6-8 parts of a neutralizer, 10-12 parts of a cosolvent, 5-8 parts of a pigment, 15-18 parts of deionized water and 4-5 parts of a mixed dispersant.

Furthermore, the cosolvent is tert-butyl alcohol and can help bisphenol A epoxy resin to be dispersed in water.

Furthermore, the mixed dispersing agent is formed by mixing ammonium stearate, lauric acid diethanolamide and monoalkoxy titanate according to the proportion of 0.5:0.1:0.3, the ammonium stearate is an anionic surfactant, the lauric acid diethanolamide is a nonionic surfactant, and the monoalkoxy titanate is a coupling agent, and researches show that the surfactant has certain effects on pigment dispersing performance, paint liquid stability, electrophoretic painting thickening and the like, so that the mixed dispersing agent prepared by accurate proportioning can obviously improve the stability of the electrophoretic paint tank liquid.

The preparation process of the water-soluble electrophoretic paint with good bath solution stability comprises the following steps:

step (1): mixing and stirring the pigment and the mixed dispersant according to the corresponding proportion, drying the mixed materials, and then porphyrizing the materials in an agate pot;

step (2): sieving the dried material with 20 μm sieve, introducing bisphenol A type epoxy resin into the sieved material, and refining for 3-5 times on a double-drum plastic refining machine to uniformly disperse the powder;

and (3): and (3) adding a neutralizing agent, a cosolvent and deionized water into the refined powder in the step (2), mixing and stirring until the mixture is uniformly mixed, so that the water-soluble electrophoretic paint can be prepared.

Compared with the prior art, the water-soluble electrophoretic paint with good bath solution stability has the following advantages:

according to the invention, the pigment granularity is strictly controlled while the electrophoretic paint is prepared, and meanwhile, the mixed dispersant formed by mixing the surfactant is added into the electrophoretic paint, so that the pigment in the electrophoretic paint is more uniformly dispersed when the electrophoretic paint is used, the stability of the electrophoretic paint in use can be obviously improved, the use effect of the electrophoretic paint is effectively ensured, and the long-time stable use of the electrophoretic paint is facilitated.

Detailed Description

Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs.

The present invention will be described in detail below.

A water-soluble electrophoretic paint with good bath solution stability is prepared from the following raw materials in parts by weight: 30-40 parts of bisphenol A epoxy resin, 6-10 parts of a neutralizer, 10-15 parts of a cosolvent, 5-10 parts of a pigment, 15-20 parts of deionized water and 3-5 parts of a mixed dispersant.

In this embodiment, the preferable mixture ratio of the water-soluble electrophoretic paint is as follows: 35-40 parts of bisphenol A epoxy resin, 6-8 parts of a neutralizer, 10-12 parts of a cosolvent, 5-8 parts of a pigment, 15-18 parts of deionized water and 4-5 parts of a mixed dispersant.

In this embodiment, the cosolvent is tert-butyl alcohol, which helps the bisphenol a epoxy resin to disperse in water.

In the embodiment, the mixed dispersing agent is formed by mixing ammonium stearate, lauric acid diethanolamide and monoalkoxy titanate according to the proportion of 0.5:0.1:0.3, the ammonium stearate is an anionic surfactant, the lauric acid diethanolamide is a nonionic surfactant, and the monoalkoxy titanate is a coupling agent, and researches show that the surfactant has certain effects on pigment dispersing performance, paint liquid stability, electrophoretic painting thickening and the like, so that the mixed dispersing agent prepared by accurate proportioning can obviously improve the stability of the electrophoretic paint tank liquid.

The preparation process of the water-soluble electrophoretic paint with good bath solution stability comprises the following steps:

step (1): mixing and stirring the pigment and the mixed dispersant according to the corresponding proportion, drying the mixed materials, and then porphyrizing the materials in an agate pot;

step (2): sieving the dried material with 20 μm sieve, introducing bisphenol A type epoxy resin into the sieved material, and refining for 3-5 times on a double-drum plastic refining machine to uniformly disperse the powder;

and (3): and (3) adding a neutralizing agent, a cosolvent and deionized water into the refined powder in the step (2), mixing and stirring until the mixture is uniformly mixed, so that the water-soluble electrophoretic paint can be prepared.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.