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High-solid low-viscosity hydroxy acrylic resin and preparation process thereof

A technology of viscous hydroxy acrylic acid and preparation process, applied in the direction of coating and the like, can solve the problems of high price, high solid content, affecting the scope of application, etc., and achieve the effects of low production cost, simple preparation process and low price

Inactive Publication Date: 2010-12-22
JIANGMEN PAINT FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-solid acrylic resin is a linear polymer obtained by free radical polymerization. With high solid content, its viscosity also increases, which affects construction.
At the same time, in the preparation of high-solid acrylic resin, generally only expensive high-solvent solvents can be used, which virtually increases the production cost of the product and affects its application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation process of the above-mentioned high-solid low-viscosity hydroxyl acrylic resin comprises the following steps:

[0024] 1) Pour the acrylic monomer, initiator and solvent with a total solvent content of 5% to 30% into the monomer dropping tank, stir evenly, and set aside;

[0025] 2) Pour the remaining solvent into the reaction kettle, remove the oxygen in the reaction kettle, evacuate to below -0.05MPa, and raise the temperature to 140-180°C;

[0026] 3) Add the homogeneously mixed acrylic monomer into the reaction kettle dropwise, the dropwise addition is completed within 2.5-8 hours, keep the temperature for 1-4 hours, cool down to below 100°C, release the pressure to normal pressure, and filter to obtain the product.

[0027] The temperature of the monomer dropping tank is ≤35°C.

[0028] The way to get rid of the oxygen in the reaction kettle is to evacuate and then feed nitrogen.

Embodiment 1

[0032] 1) Put 0.4 parts of acrylic acid, 11.1 parts of methyl methacrylate, 28 parts of styrene, 10.5 parts of butyl methacrylate, 17 parts of hydroxypropyl acrylate, 3 parts of TBPB, and 5 parts of xylene into the dropping tank, mix Evenly, keep the temperature in the dropping tank not higher than 35°C;

[0033] 2) Pour 25 parts of butyl acetate into the reaction kettle, evacuate to -0.08Mpa, use nitrogen to repress to normal pressure, then evacuate to below -0.05Mpa, and heat the solvent in the kettle to 160°C;

[0034] 3) Add the mixture in the dropping tank dropwise to the reaction kettle in 4 hours, and after the dropwise addition is completed, keep the temperature for reaction for 3 hours;

[0035] 4) Lower the temperature, release the pressure and discharge the material to obtain the resin.

Embodiment 2

[0037] 1) Add 0.5 parts of acrylic acid, 12 parts of methyl methacrylate, 25 parts of styrene, 10.5 parts of butyl acrylate, 20 parts of hydroxypropyl methacrylate, 2 parts of di-tert-butyl peroxide, and 5 parts of xylene Dropping tank, mix evenly, keep the temperature in the dropping tank not higher than 35°C;

[0038] 2) Pour 25 parts of xylene into the reaction kettle, evacuate to -0.08Mpa, use nitrogen to repress to normal pressure, then evacuate to below -0.05Mpa, and heat the solvent in the kettle to 162°C;

[0039] 3) Add the mixture in the dropping tank dropwise into the reaction kettle in 4.5 hours, after the dropwise addition, keep the temperature for 4 hours;

[0040] 4) Lower the temperature, release the pressure and discharge the material to obtain the resin.

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PUM

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Abstract

The invention discloses a high-solid low-viscosity hydroxy acrylic resin and a preparation method thereof. The hydroxy acrylic resin comprises the following raw materials in part by mass: 25 to 35 parts of solvent, 0.2 to 2 parts of acrylic acid, 7 to 16 parts of methyl methacrylate, 15 to 35 parts of styrene, 3 to 10.5 parts of butyl methacrylate or butyl acrylate, 12 to 23 parts of hydroxy-containing acrylic monomer and 1.5 to 8 parts of initiator. During preparation, the product is obtained by pressurized reaction. The solid of the hydroxy acrylic resin can reach 65 to 75 percent, and the viscosity is only 1,00 to 2,500mps. The solvent used in the process is cheap, the expensive solvent with high boiling point is not needed, the preparation process is simple, and the production cost is low.

Description

technical field [0001] The invention relates to an acrylic resin and a preparation process thereof, in particular to a high-solid and low-viscosity hydroxyl acrylic resin and a preparation process thereof. Background technique [0002] As people pay more and more attention to environmental protection, the high-solid content and low-viscosity of solvent-based resins for coatings is the goal people pursue. Boiling point solvents are relatively expensive, and some cheap solvents have relatively poor solvency. [0003] Traditional solvent-based acrylic resins have good weather resistance and chemical stability and are widely used. However, because of the high solvent content in acrylic resin, which does not match the requirements of environmental protection, its market share is squeezed by other environmentally friendly resins. [0004] The content of organic volatiles in the high-solid acrylic resin is greatly reduced, and the curing energy consumption is also greatly reduced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/06C08F220/14C08F220/18C08F220/28C09D125/14C09D133/14
Inventor 黄晓昌程建阮济衡
Owner JIANGMEN PAINT FACTORY
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