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A kind of method adopting sol-gel method to prepare water-based acrylic resin for automobile paint

A technology of water-based acrylic and gel method, which is applied in coatings, anti-corrosion coatings, etc., and can solve the problems of resin acid and alkali resistance, poor water resistance and corrosion resistance, and wide molecular weight distribution of water-based resins.

Active Publication Date: 2019-03-05
英德市正宏涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process of this emulsion polymerization method is simple, the most prominent disadvantage is that the molecular weight distribution of the synthesized water-based resin is relatively wide, and there are many residual monomers with polar functional groups. Poor water and corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of method adopting sol-gel method to prepare water-based acrylic resin for automobile paint, comprises the following steps:

[0018] Step 1: Preparation of sol solution: Add 1 part by weight of ethyl orthosilicate and 1.7 parts by weight of dimethyldiethoxysilane to 40 parts by weight of absolute ethanol, raise the temperature to 50 ° C, and stir the reaction 3h, then add 3-4 parts by weight of sodium dodecylbenzenesulfonate, and continue stirring until the material is completely dissolved;

[0019] Step 2: Preparation of monomer phase: 17 parts by weight of methyl methacrylate, 7 parts by weight of styrene, 13 parts by weight of acrylic acid, 13 parts by weight of hydroxyethyl methacrylate, 8 parts by weight of vinyl Pyrrolidone, 2 parts by weight of sodium dodecylbenzenesulfonate, and 0.8 parts by weight of azobisisoheptanonitrile are mixed uniformly to obtain a monomer phase;

[0020] Step 3: Put the sol solution in the reaction vessel, control the pressure a...

Embodiment 2

[0023] A kind of method adopting sol-gel method to prepare water-based acrylic resin for automobile paint, comprises the following steps:

[0024] Step 1: Preparation of sol solution: Add 0.6 parts by weight of ethyl orthosilicate and 2 parts by weight of methyltriethoxysilane to 35 parts by weight of absolute ethanol, raise the temperature to 50°C, and stir for 3 hours , then add 3 parts by weight of sodium dodecylbenzenesulfonate, and continue to stir until the material is completely dissolved;

[0025] Step 2: Preparation of the monomer phase: 15 parts by weight of methyl methacrylate, 5 parts by weight of styrene, 10 parts by weight of acrylic acid, 15 parts by weight of hydroxyethyl methacrylate, 5 parts by weight of vinyl Pyrrolidone, 1 weight part of sodium dodecylbenzenesulfonate, and 0.5 weight part of azobisisobutyronitrile are mixed uniformly to obtain a monomer phase;

[0026] Step 3: Put the sol solution in the reaction vessel, control the pressure at 2MPa, add t...

Embodiment 3

[0029] A kind of method adopting sol-gel method to prepare water-based acrylic resin for automobile paint, comprises the following steps:

[0030] Step 1: Preparation of sol solution: Add 1 part by weight of ethyl orthosilicate and 1.5 parts by weight of methyltriethoxysilane to 45 parts by weight of absolute ethanol, raise the temperature to 50 ° C, and stir for 3 hours , then add 4 parts by weight of sodium dodecylbenzenesulfonate, and continue to stir until the material is completely dissolved;

[0031] Step 2: Preparation of the monomer phase: 20 parts by weight of methyl methacrylate, 10 parts by weight of styrene, 15 parts by weight of acrylic acid, 10 parts by weight of hydroxyethyl methacrylate, 5 parts by weight of vinyl Pyrrolidone, 3 parts by weight of sodium dodecylbenzenesulfonate, and 0.5-0.8 parts by weight of azobisisobutyronitrile are uniformly mixed to obtain a monomer phase;

[0032] Step 3: Put the sol solution in the reaction vessel, control the pressure ...

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Abstract

The invention relates to the field of new polymer materials, mainly aims to solve the problems of poor acid and alkali resistance, water resistance and corrosion resistance of waterborne automobile paint in the prior art, and mainly discloses a method for preparing waterborne acrylic resin for automobile paint by a sol-gel process, and the method comprises the following steps: step 1, sol solution preparation; step 2, monomer phase preparation; step 3, placement of a sol solution into a reaction vessel under the pressure controlled in 1-3MPa, dropwise addition of the monomer phase into the reaction system within the adding time of 1-2h at the reaction temperature controlled at 60-80 DEG C; and step 4, regulation of the pH value of the system. The waterborne acrylic resin for the automobile paint has good acid and alkali resistance, water resistance and corrosion resistance.

Description

technical field [0001] The invention relates to the field of new polymer materials, in particular to a method for preparing water-based acrylic resin for automobile paint by using a sol-gel method. Background technique [0002] The earliest commercialized water-based paints appeared in the 1930s. Based on its compatibility and protection to the environment, as well as the advantages of saving resources and energy, water-based coating products were quickly accepted by the market and gradually developed and expanded. In 1986, water-based coatings in Japan and the United States accounted for 18% and 22% of the total sales volume of coatings respectively. In 1995, the output of water-based coatings in the United Kingdom accounted for 64.5% of the total production of coatings in the country. Foreign water-based coatings are mostly used in construction, automobile, woodware and other industries. There are various types of resin products for high-performance water-based metal pain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F212/08C08F220/06C08F220/28C08F226/10C08F2/26C08F2/44C09D133/12C09D5/08C09D7/61
CPCC08F2/26C08F2/44C08F220/14C08K3/36C09D5/08C09D7/61C09D133/12C08F212/08C08F220/06C08F220/281C08F226/10
Inventor 张佐宏罗银好郝志峰余倩孙明郭荣刘波
Owner 英德市正宏涂料有限公司