Preparation method of polyester acrylate hybrid aqueous dispersion

A technology of polyester acrylate and acrylate, which is applied in the field of preparation of new polyester acrylate hybrid water dispersions, can solve the problems of high solvent content of dispersions, low gloss of coatings, poor water resistance, etc., and achieve dispersion process Simple and environmentally friendly, good water resistance, and the effect of improving construction performance

Inactive Publication Date: 2010-09-08
ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is, aiming at the characteristics of the existing aqueous dispersions with single resin components, the aqueous dispersions are mainly water-based through amine neutralization reactions, the dispersions have high solvent content, the coating gloss is not high, and the water resistance is poor. Provide a kind of preparation method of polyester acrylic acid hybrid aqueous dispersion

Method used

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  • Preparation method of polyester acrylate hybrid aqueous dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of hydroxyacrylate resin

[0043] First add 280g of propylene glycol methyl ether acetate into the reaction kettle with a condensing device and a stirring rod, and raise the temperature to the reflux temperature of 130°C while feeding nitrogen gas; after constant temperature, start to drop 200g of methyl methacrylate, hydroxypropyl acrylate A mixed solution of ester 300g and tert-amyl peroxyacetate 13.5g. Control the dropping speed, add the monomer mixture within 2 to 3 hours, keep it for 0.5 to 1 hour, then add a mixed solution of 1.5g initiator and 15g propylene glycol methyl ether acetate, keep warm for 2 to 3 hours, and measure the hydroxyl The conversion rate of the acrylate resin reaches more than 98%, and then drops to room temperature.

[0044] The obtained hydroxyacrylate resin is characterized by the following methods:

[0045] Acrylic resin molecular weight test: adopt the Waters 515 gel chromatograph of American Waters company to measure; ...

Embodiment 2

[0074] Embodiment 2: the preparation of polyester acrylate hybrid aqueous dispersion

[0075] First drop into the hydroxyacrylic acid ester resin 138g of the step (1) of embodiment 1 in the reactor that has condensing device and stirring bar, 1,4-butanediol 221g, adipic acid 320g, trimethylol propane 18g, 168g of the intermediate in step (2) of Example 1, control the heating rate for about 30 minutes and raise the temperature to 160°C while blowing nitrogen gas. After 1 hour of heat preservation, the temperature rises to 220°C. Continue to keep heat for 2 hours, then cool down to 140°C, and then add hydroxyl Take 262g of acrylic resin prepolymer, raise the temperature to 220°C, and continue to react for 1h until the acid value of the resin is ≤15mgKOH / g. Cool the resin solution to about 70°C, pour it into a container, then slowly add 780g of deionized water dropwise, stir and disperse for 40min at 2500 rpm under a high-speed disc disperser to obtain the product. Product techn...

Embodiment 3

[0078] Embodiment 3: the preparation of polyester acrylate hybrid aqueous dispersion

[0079] First drop into the hydroxyacrylate resin 148g of the step (1) of embodiment 1 in the reactor that has condensing device and stirring bar, diethylene glycol 245g, adipic acid 320g, trimethylolpropane 18g, embodiment 1 168g of the intermediate in step (2), control the heating rate for about 30 minutes and raise the temperature to 160°C while blowing nitrogen gas. After 1 hour of heat preservation, the temperature rises to 220°C. Continue to keep heat for 2 hours, then lower the temperature to 140°C, and then add hydroxyacrylic resin for pretreatment Polymer 252g, heat up to 220°C, continue to react for 1h until the acid value of the resin is ≤15mgKOH / g. Cool the resin solution to about 70°C, pour it into a container, then slowly add 790g of deionized water dropwise, stir and disperse for 50min at 2500 rpm under a high-speed disperser to obtain the product. Product technical indicators...

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Abstract

The invention relates to a preparation method of polyester acrylate hybrid aqueous dispersion, which belongs to the field of chemical coatings, and the preparation method comprises four steps of synthesizing hydroxyl acrylate resin, preparing an intermediate, preparing polyester acrylate resin and dispersing with deionized water. The preparation method effectively combines the advantages of polyester and acrylic resin, the prepared stable dispersion can be used as the hydroxyl resin component of a dual-component polyurethane coating for preparing a high-performance waterborne dual-component polyurethane coating with hydrophilic polyisocyanate, and a coating film has excellent performance; in addition, the preparation of the dispersion does not use amine as a neutralizer, thereby avoiding the smell caused by the amine and simplifying the process; and only a small amount of cosolvent is adopted in the dispersion, and the content of an organic solvent in the coating is low.

Description

technical field [0001] The invention belongs to the field of chemical coatings, and in particular relates to a preparation method of a novel polyester acrylate hybrid water dispersion used for high-performance two-component waterborne polyurethane coatings. Background technique [0002] In recent years, due to the requirements of environmental protection regulations and the need for energy saving and emission reduction, it has become a development trend of coatings to replace solvent-based coatings with water-based coating technology. As an important part of two-component polyurethane coatings, polyol resin is related to the water-based polyurethane coatings, because it has received extensive attention and research. [0003] Polyols commonly used in two-component waterborne polyurethane coatings include polyacrylate polyols, polyester polyols, polyether polyols, polycarbonate polyols, etc. Among them, polyacrylate polyols with high gloss, good flexibility and good weather r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08G63/688C08F220/14C08F220/28C08J3/07C09D175/06
Inventor 刘娅莉余喜红任娜娜谭雅婷
Owner ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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