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Method for synthesizing aqueous hydroxyl polyacrylate dispersoid

A technology of hydroxy polyacrylate and synthesis method, applied in the field of water-based hydroxy-containing polyacrylate dispersion synthesis, can solve the problem that water resistance, solvent resistance, chemical resistance, abrasion resistance and hardness cannot reach solvent-based polyurethane coatings and other problems, to achieve the effect of low cost, high hardness and fast drying

Inactive Publication Date: 2015-02-18
重庆市大足区众科管道设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One-component water-based polyurethane coatings are easy to construct, but many of their properties, such as water resistance, solvent resistance, chemical resistance, abrasion resistance, hardness, etc., cannot reach the level of solvent-based polyurethane coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A kind of aqueous hydroxyl-containing polyacrylate dispersion synthetic method, comprises the steps:

[0021] Take by weighing a certain amount of propylene glycol butyl ether and glycidyl tertiary carbonic acid ester, join in the four-neck flask that stirring device, dropping device, condenser tube, heating device are housed;

[0022] After stirring and heating to the desired temperature, dropwise add a part of the mixed solution of AA, MMA, St, BA, HEMA and part of the initiator, keeping the reaction temperature and stirring speed constant;

[0023] Add part of the initiator after the heat preservation, quickly add the remaining initiator after the heat preservation, and lower the temperature;

[0024] Add dimethylethanolamine, stir evenly, slowly add deionized water dropwise, emulsify, filter, and discharge to obtain an aqueous hydroxyl-containing polyacrylate dispersion.

Embodiment 1

[0026] Weigh 2.386g of propylene glycol butyl ether and 1.786g of glycidyl tertiary carbonic acid ester, and add them into a four-neck flask equipped with a stirring device, a dropping device, a condenser tube, and a heating device; stir for 20 minutes and heat to 75°C, drop Add a mixed solution of 20% AA, 15% MMA, 12% St, 9% BA, 27% HEMA and 40% initiator, keep the reaction temperature and stirring speed constant, and complete the dropwise addition within 3 hours; Quickly add 10% initiator after 0.5h, quickly add the remaining initiator after 1.5h of heat preservation, and cool down to 50°C; add 3.223g of dimethylethanolamine, stir well, slowly add 20ml of deionized water dropwise, and emulsify and discharging after filtration to obtain a water-based hydroxyl-containing polyacrylate dispersion.

Embodiment 2

[0028] Weigh 2.398g of propylene glycol butyl ether and 1.896g of glycidyl tertiary carbonic acid ester, and add them into a four-necked flask equipped with a stirring device, a dropping device, a condenser tube, and a heating device; stir for 26 minutes and heat to 78°C, drop Add a mixed solution of 22% AA, 18% MMA, 13% St, 11% BA, 35% HEMA and 48% initiator, keep the reaction temperature and stirring speed constant, and complete the dropwise addition within 4 hours; Add 13% initiator quickly after 0.6h, quickly add the remaining initiator after keeping warm for 2h, and cool down to 55°C; add 4.263g of dimethylethanolamine, stir well and slowly add 26ml of deionized water dropwise, emulsification, After filtering, the material is discharged to obtain an aqueous hydroxyl-containing polyacrylate dispersion.

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PUM

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Abstract

The invention relates to a method for synthesizing aqueous hydroxyl polyacrylate dispersoid. The method comprises the following steps: weighing and adding a certain amount of propanediol butyl ether and tertiary carbonate glycidyl ester into a four-mouth flask with a stirring device, a dripping device, a condensation tube and a heating device, stirring, heating the mixture to the required temperature, dripping a mixed solution containing a part of AA, MMA, St, BA, HEMA and a part of an initiator, keeping the reaction temperature and the stirring speed constant, replenishing a part of the initiator when the temperature is maintained, rapidly replenishing the rest initiator when the temperature is kept, cooling, adding dimethylethanolamine, uniformly stirring, slowly dripping deionized water, emulsifying, filtering, discharging, and obtaining the aqueous hydroxyl polyacrylate dispersoid. The method provided by the invention is simple, low in cost and easy to control, the synthesized aqueous hydroxyl polyacrylate dispersoid is good in water resistance, weather resistance with respect to the paint film, high in light and color maintenance property, high in hardness and rapid to dry.

Description

technical field [0001] The invention relates to a synthesis technology of an organic paint preparation material, in particular to a synthesis method of a water-based hydroxyl-containing polyacrylate dispersion. Background technique [0002] Traditional polyurethane coatings have many excellent properties, such as strong adhesion, good wear resistance, adjustable elasticity, acid resistance, alkali resistance, high and low temperature resistance, etc., so they are used in national defense, construction, chemical industry, vehicles, wood, Aircraft and other fields have been widely used, but they contain a large amount of organic solvents such as toluene and xylene, which will cause great harm to the environment and human beings. With the establishment of environmental regulations and the enhancement of people's awareness of environmental protection, water-based coatings have attracted more and more interest. Water-based polyurethane coatings replace toxic and harmful organic ...

Claims

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Application Information

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IPC IPC(8): C08F220/28C08F220/06C08F220/14C08F212/08C08F220/18C09D133/14
Inventor 吴礼才
Owner 重庆市大足区众科管道设备有限公司
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