Alkyl silyl ether modified hydroxyl acrylic emulsion and preparation method thereof and application thereof

A technology of hydroxy acrylic acid and alkyl silyl ether, used in coatings, anti-corrosion coatings, etc., can solve the problems of affecting cross-linking curing, affecting the use effect of two-component coatings, etc., and achieve the effect of excellent paint film performance

Active Publication Date: 2020-11-10
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But obviously, reducing the activity of reactive groups can increase the pot life, but to a certain extent, it will affect the ability of crosslinking and curing, thus affecting the use effect of two-component coatings.

Method used

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  • Alkyl silyl ether modified hydroxyl acrylic emulsion and preparation method thereof and application thereof
  • Alkyl silyl ether modified hydroxyl acrylic emulsion and preparation method thereof and application thereof
  • Alkyl silyl ether modified hydroxyl acrylic emulsion and preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of alkyl silyl ether modified hydroxyacrylic acid emulsion 1 (hereinafter referred to as emulsion 1 for short)

[0037] Emulsion 1 was prepared as follows:

[0038] (1): Preparation of hydroxyacrylic acid emulsion:

[0039] (1.1) Dissolve 0.9g SDS in 30g water, then add 47g MMA, 30g BA, 10g HEMA and 2gAA in sequence, and stir in the emulsification tank to form a pre-emulsion;

[0040] (1.2) After dissolving 0.1g SDS with 110g deionized water, add it in the reactor, feed nitrogen to exhaust the air in the reactor, and keep the reaction temperature at 85°C; get 4% of the total mass of the pre-emulsion and put it into the reactor as The seed emulsion of nucleus, then add 40% (10%APS, total mass 5.0g) of the gross mass of APS aqueous solution as initiator;

[0041] (1.3) After the polymerization reaction takes place for 30 minutes, add the remaining pre-emulsion and the remaining initiator dropwise for a total of 4 hours while maintaining the react...

Embodiment 2-8

[0044] Example 2-8 Preparation of alkyl silicone ether modified hydroxyacrylic acid emulsion 2-8 (respectively referred to as emulsion 2-8 hereinafter)

[0045] Emulsion 2-8 was prepared using a method similar to that of Example 1, the only difference being that each raw material and its dosage and polymerization reaction temperature are shown in Table 2.

Embodiment 9

[0063] With the emulsion 1 prepared in embodiment 1 as raw material, prepare water-based two-component acrylic anticorrosion coating according to the following method:

[0064] First, add 3.5g of water, 0.3g of 104E, 8.5g of BYK-190, 0.2g of BYK-011 into the dispersion tank, and stir at 300r / min for 10min. Add 37.5g of R706, increase the speed to 800r / min, and disperse evenly at high speed, then add zirconium beads equal to the volume of titanium dioxide, and grind the slurry to a fineness of ≤35μm. Reduce the rotational speed, add 34g of the emulsion 1 prepared in Example 1 under stirring at 300r / min, add DMEA (N,N-dimethylethanolamine) to adjust the pH at 8.0-9.0, then add 2.5g of ethylene glycol butyl ether, 2.5g of Dipropylene glycol butyl ether, 0.1g Tego-4100, 0.5g BYK-825, then dilute 4.8g Aquolin270 with 1.2g propylene glycol diacetate and add to the dispersion tank, add 0.5g BYK-425 according to the viscosity of the paint, replenish water 3.4g and stir well. Filter ...

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Abstract

The invention provides an alkyl silyl ether modified hydroxy acrylic emulsion and a preparation method thereof and application thereof. The hydroxyl acrylic emulsion is prepared from the following components in parts by weight: 50-99 parts of acrylate monomers; 0.1 to 5 parts of a functional monomer acid; 0.1 to 20 parts of a hydroxyl monomer; 0.1 to 20 parts of alkyl silyl ether; 0.1-5 parts of emulsifier. The hydroxyl acrylic emulsion is obtained by adding alkyl silyl ether into the acrylic emulsion neutralized to alkalescence and reacting at room temperature. According to the invention, byutilizing the change of the pH value of the prepared alkyl silyl ether modified hydroxyl acrylic emulsion before and after film formation, the conversion of protection and deprotection of alkyl silylether on hydroxyl is ingeniously realized, so that the water-based two-component acrylic industrial coating has an ultra-long activation period, does not influence the normal use of the coating, and has excellent paint film performance.

Description

technical field [0001] The invention relates to a hydroxyacrylic acid emulsion, in particular to a hydroxyacrylic acid emulsion modified by an alkyl silicon ether, a preparation method and an application thereof, and belongs to the technical field of water-based coatings. Background technique [0002] Waterborne acrylic industrial coatings are generally divided into one-component coatings and two-component coatings according to their composition. One-component water-based acrylic paint has the advantages of low cost and good weather resistance, but its chemical resistance is not good, so it is generally used as a top coat. Two-component water-based acrylic coatings are divided into hydroxyacrylic emulsions and hydroxyacrylic dispersions. Compared with single-component coatings, their hardness, abrasion resistance, and chemical resistance are more prominent. Among them, hydroxyacrylic dispersion also has excellent gloss and fullness, but it will increase some VOC emissions, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F220/14C08F220/18C08F220/20C08F220/06C08F2/26C08F8/42C09D151/00C09D5/08
CPCC08F265/06C08F2/26C08F8/42C09D151/003C09D5/08C08F220/14C08F220/1804C08F220/20C08F220/06
Inventor 方武成马吉全程继业纪学顺孙家宽
Owner WANHUA CHEM GRP CO LTD
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