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Preparation method of hydroxy acrylic resin coating

A technology of hydroxyacrylic and resin coatings, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of irritation, flammability, pollution, etc., achieve good adhesion, reduce emissions, and smooth appearance

Inactive Publication Date: 2018-04-20
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Benzene solvents are not only flammable and irritating, but also pollute the air environment, water environment and water sources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1 A hydroxy acrylic resin coating is made of hydroxy acrylic resin and mixed solvent; the preparation steps and conditions of hydroxy acrylic resin are as follows: (1) Add 10wt% of raw materials and auxiliary raw materials into a reactor with a stirring device, Heat up to 93ºC, stir at 300r / min, and react for 2 hours to obtain component 1. The raw material is 22wt% methyl methacrylate (MMA), 324.29g, and styrene (St) 44wt% , 648.58g, n-butyl methacrylate (BA) is 30wt%, 442.21g, acrylic acid (AA) is 1wt%, 14.74g and hydroxyethyl methacrylate (HEMA) are 3wt%, 44.22g; auxiliary materials As follows: the initiator azobisisobutyronitrile (AIBN) is 2wt% of the total mass of the raw material, which is 29.48g; the chain transfer agent tert-dodecyl mercaptan (TDM) is 0.5wt% of the total mass of the raw material, which is 7.37g; The total mass ratio of the mixed solvent and the raw material is 1:3, and the mixed solvent is a mixed solvent of sec-butyl acetate 436.82g and 5...

Embodiment 2

[0020] Example 2 A hydroxy acrylic resin coating is made of hydroxy acrylic resin and mixed solvent; the preparation steps and conditions of hydroxy acrylic resin are as follows: (1) Add 10wt% of raw materials and auxiliary raw materials into a reactor with a stirring device, The temperature is raised to 100ºC, the rotation speed is 300r / min, and the stirring is performed. The reaction time is 1.5 hours to obtain component 1. The mass percentages of the raw materials and auxiliary raw materials are the same as in Example 1; the total mass ratio of the mixed solvent and the raw materials is 1:3, The mixed solvent is a mixed solvent of 383.87g of sec-butyl acetate and 107.13g of propylene glycol methyl ether acetate with a mass ratio of 3.58:1;

[0021] (2) The remaining raw materials and auxiliary raw materials are mixed to make a mixed solution as component 2, and component 2 is added dropwise to component 1 by means of dripping. After 2 hours of dripping, it is maintained at 100º...

Embodiment 3

[0026] Example 3 A hydroxy acrylic resin coating is made of hydroxy acrylic resin and mixed solvent; the preparation steps and conditions of hydroxy acrylic resin are as follows: (1) Add 10wt% of raw materials and auxiliary raw materials into a reactor with a stirring device, The temperature is raised to 105ºC, the rotation speed is 300r / min, and the stirring is carried out. The reaction time is 1 hour to obtain component 1. The mass percentage of the raw materials and auxiliary raw materials is the same as in Example 1; the total mass ratio of mixed solvent and raw materials is 1:3, The mixed solvent is a mixed solvent of 183.59g of sec-butyl acetate and 307.41g of propylene glycol methyl ether acetate with a mass ratio of 0.60:1;

[0027] (2) Then mix the remaining raw materials and auxiliary raw materials to make a mixed solution. As component 2, add component 2 to component 1 by dripping. The dripping is completed in 1 hour and kept at 105ºC. Reaction 6. Hours to obtain hydro...

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PUM

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Abstract

The invention relates to a preparation method of a hydroxy acrylic resin coating. The preparation method has the advantages that the problem of high-toxicity solvents of methylbenzene, xylene and thelike is solved by a low-toxicity sec-butyl acetate and propylene glycol methyl ether acetate mixed solvent; the hydroxy acrylic resin coating with excellent use property and high solid content is prepared, so as to effectively reduce the emission of harmful matters; the sec-butyl acetate and propylene glycol methyl ether acetate with larger pressure difference of saturated steam are used as the mixed solvent, so that the defects of whitening, bubbling or ragging, pinhole and the like due to overhigh or overlow volatizing rate of single solvent are effectively avoided; the boiling point of themixed solvent meets the requirement of polymerizing at higher temperature, and the molecular weight of the prepared resin is smaller; the viscosity of the hydroxy acrylic resin can be effectively regulated and controlled by the mixed solvent under the condition of higher solid content; the prepared paint film after curing has regular and bright appearance and high hardness, the hardness of a pencil reaches 2H, and the adhesion force is good and reaches 0 level; the solid content of the coating reaches 75%; the hydroxy acrylic resin coating can be used as a polishing varnish coating of an automobile cover.

Description

Technical field [0001] The invention belongs to the technical field of automotive finishing varnish paints, and specifically relates to a preparation method of a low-toxic and environmentally friendly hydroxy acrylic resin paint synthesized by using sec-butyl acetate-propylene glycol methyl ether acetate as a mixed solvent. Background technique [0002] With the development of the national economy, the automotive coating industry has gradually developed into an important industry indispensable in various fields of the national economy. Since 2009, China has become the world's number one country in automobile production and sales. In solvent-based coatings, the development of high-solid content coatings and the use of low-toxic solvents to replace toxic and harmful solvents have become a development trend [1]. The most toxic and harmful solvents currently used in the industry are benzene solvents, such as toluene and xylene [2]. Benzene solvents are not only flammable and irrita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C08F212/08C08F220/14C08F220/18C08F220/06C08F220/20C08F2/38C08F2/06C08G18/62C08G18/73
CPCC08F212/08C08G18/6229C08G18/73C09D175/04C08F220/14C08F220/1804C08F220/06C08F220/20
Inventor 郐羽韩金龙李勃润臧欢丁志成何佳欢王洪渤周勤
Owner CHANGCHUN UNIV OF TECH
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