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Cationic aqueous hydroxy acrylic resin secondary dispersion and preparation method thereof

A technology of hydroxyacrylic acid and secondary dispersion, which is applied in the direction of antifouling/underwater coatings, coatings, paints containing biocides, etc., and can solve the problems of adhesion, alkali resistance sealing, shielding and anti-stain penetration. Meet other problems, achieve the effect of small particle size, good fluidity, and improve adhesion

Inactive Publication Date: 2017-09-15
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These are dispersions with anions as hydrophilic groups, which have good film-forming properties, gloss and color retention, chemical resistance and weather resistance when used as coatings. However, in special occasions such as antifouling and antirust on metal surfaces, Due to the characteristics of the anionic group of the dispersion, its adhesion, anti-alkali sealing, covering and anti-stain penetration cannot meet its specific application requirements

Method used

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  • Cationic aqueous hydroxy acrylic resin secondary dispersion and preparation method thereof
  • Cationic aqueous hydroxy acrylic resin secondary dispersion and preparation method thereof
  • Cationic aqueous hydroxy acrylic resin secondary dispersion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This example aims to demonstrate cationic waterborne hydroxyacrylic resin secondary dispersion and its preparation method, as follows:

[0056] Ethylene glycol monobutyl ether 18 g, 100 # Add 18 g of solvent naphtha and 1 g of di-tert-butyl peroxide into the reaction vessel, blow nitrogen, stir and heat up to 145 °C, and keep it warm for 15 min; add 32 g of methyl methacrylate, 46 g of n-butyl acrylate, and hydroxy A mixture of 29.2 g of ethyl ester, 12.8 g of styrene, 0.96 g of α-methylstyrene dimer and 4.8 g of di-tert-butyl peroxide was dropped into the reaction vessel at a constant speed, and the dripping was completed within 1.5 h, and the temperature was continued for 10 min; 18 g of methyl methacrylate, 26 g of n-butyl acrylate, 16.8 g of hydroxyethyl methacrylate, 7.2 g of styrene, 12 g of dimethylaminoethyl methacrylate and 3.2 g of di-tert-butyl peroxide Add g of the mixture into the reaction vessel at a uniform speed, control the dripping within 1 h, and con...

Embodiment 2

[0059] Compared with Example 1, this example aims to demonstrate the cationic waterborne hydroxyl acrylic resin secondary dispersions with different contents of tertiary amino group-containing acrylic monomers and their preparation methods.

[0060] Ethylene glycol monobutyl ether 18 g, 100 # Add 18 g of solvent naphtha and 1 g of di-tert-butyl peroxide into the reaction vessel, blow nitrogen, stir and raise the temperature to 145 °C, and keep it warm for 15 min; add 31.8 g of methyl methacrylate, 45.6 g of n-butyl acrylate, and hydroxy A mixture of 29 g of ethyl ester, 12.6 g of styrene, 0.96 g of α-methylstyrene dimer and 4.8 g of di-tert-butyl peroxide was dropped into the reaction vessel at a constant speed, and the dripping was completed within 1.5 h, and the temperature was continued for 10 min; 18.6 g of methyl methacrylate, 26.6 g of n-butyl acrylate, 17 g of hydroxyethyl methacrylate, 7.4 g of styrene, 10.4 g of dimethylaminoethyl methacrylate and di-tert-butyl peroxi...

Embodiment 3

[0063] Compared with Example 1, this example aims to demonstrate the different M 1 / M 2 Proportional cationic waterborne hydroxyacrylic resin secondary dispersion and preparation method thereof.

[0064] Ethylene glycol monobutyl ether 18 g, 100 # Add 18 g of solvent naphtha and 1 g of di-tert-butyl peroxide into the reaction vessel, blow nitrogen gas, stir and heat up to 145 °C, and keep it warm for 15 min; add 40.2 g of methyl methacrylate, 52.2 g of n-butyl acrylate, hydroxymethacrylate A mixture of 31.6 g of ethyl ester, 14.9 g of styrene, 1.12 g of α-methylstyrene dimer and 5.6 g of di-tert-butyl peroxide was dropped into the reaction vessel at a constant speed, and the dripping was completed within 1.5 h. Insulate for 10 min; add 14 g of methyl methacrylate, 18.3 g of n-butyl acrylate, 10.6 g of hydroxyethyl methacrylate, 5.1 g of styrene, 12 g of dimethylaminoethyl methacrylate and ditertiary peroxide Add 2.4 g of butyl mixture into the reaction vessel at a constant ...

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Abstract

The invention relates to a cationic aqueous hydroxy acrylic resin secondary dispersion and a preparation method thereof. The dispersion comprises, by mass, 40-45% of cationic aqueous hydroxy acrylic resin, 2-9% of an organic solvent and 46-58% of deionized water. The dispersion has high adhesion, high alkali-resistant sealing property, high shielding property and high spot permeation resistance. The average size of the dispersion is small and is 90-160 nm, the particle size distribution is narrow, the polydispersity coefficient PID is 0.05-0.15, and the dispersion has good uniformity, so the improvement of the comprehensive performances of a film formed by the dispersion is benefited. The dispersion has small viscosity, so the subsequent construction of a mixture of the dispersion and a curing agent in the coating preparation process is facilitated. The dispersion has the advantages of good fluidity, high stability, no layering, settling or precipitating phenomena after standing storage at room temperature for 60 d or more, and no obvious change of the particle size, the particle size distribution and the viscosity.

Description

technical field [0001] The invention relates to a cationic waterborne hydroxyl acrylic resin secondary dispersion and a preparation method thereof. Background technique [0002] With the continuous strengthening of people's awareness of environmental protection and safety, and the improvement of relevant environmental protection laws and regulations, green and environmentally friendly water-based coatings have gradually replaced solvent-based coatings and become the mainstream of coating development. [0003] Water-based hydroxyacrylic resin dispersion has the advantages of low VOC, molecular designability, dispersion stability, flexibility of use, and wide application. It is used in chemical coatings such as wood and exterior walls. US patents US6399691, US2007282049A1 and Chinese patents CN101914185A and CN102850703A all describe the preparation method of the secondary dispersion of aqueous acrylic resin. The said dispersion adopts a two-step free radical solution polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F220/14C08F220/18C08F220/28C08F212/08C08F220/34C08F2/38C08F293/00C09D151/00C09D5/16C09D5/08C09D153/00
CPCC08F2/38C08F265/06C08F293/00C09D5/08C09D5/1668C09D151/003C09D153/00C08F220/1804
Inventor 胡和丰汪水刘西振徐沈钧叶栋高菁菁孙莺
Owner SHANGHAI UNIV
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