Hydroxy acrylic resin dispersoid and waterborne coating prepared from same

A technology of hydroxyacrylic acid dispersion, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of reducing the gloss and fullness of paint films, increasing the viscosity of resin aqueous dispersions, and low construction efficiency. High neutrality, reduced energy consumption, and easy operation

Inactive Publication Date: 2018-02-23
CHANGZHOU HUAKE POLYMERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A higher concentration of hydrophilic groups will greatly increase the viscosity of the resin water dispersion, and sometimes even reach the point where construction is impossible. In order to achieve the construction viscosity, it has to be diluted to a very low solid content (<30%), too low The solid content will reduce the gloss and fullness of the paint film, and the construction efficiency will be low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example is intended to demonstrate the preparation of aqueous dispersions of hydroxyacrylic resins, as follows:

[0027] (1) Add 40g propylene glycol butyl ether and 40g No. 100 solvent oil into the reaction vessel and stir evenly to raise the temperature to 110-120°C, and bubble nitrogen for 30 minutes; add 110g methyl methacrylate, 90g hydroxyethyl methacrylate, 26g Butyl methacrylate, 90g butyl acrylate, 10g benzoyl peroxide, and 1g tert-butyl peroxybenzoate were mixed and stirred evenly to prepare a monomer mixture. After the reaction vessel was heated up and blown nitrogen, the monomer mixture was added dropwise into Reactor, control the rate of addition, so that the monomer mixture is added dropwise within 3 hours, and after the drop is completed, it is kept at 110-120°C for 1 hour;

[0028](2) The reactant of the first step is kept at 110~120°C, with 36g methyl methacrylate, 18g hydroxyethyl methacrylate, 16g butyl acrylate, 10g methacrylic acid, 3g benzoyl ...

Embodiment 2

[0032] This example shows aqueous dispersions of hydroxyacrylic resins with different acid values, as follows:

[0033] Add 40g propylene glycol butyl ether and 40g No. 100 solvent oil into the reaction vessel and stir evenly to raise the temperature to 110-120°C, and bubble nitrogen for 30 minutes; add 110g methyl methacrylate, 90g hydroxyethyl methacrylate, 36g methacrylic acid Butyl, 40g butyl acrylate, 40g isooctyl acrylate, 10g benzoyl peroxide, and 1g tert-butyl peroxybenzoate were mixed and stirred evenly to obtain a monomer mixture. Add it dropwise into the reactor, and control the rate of addition so that the monomer mixture is added dropwise within 3 hours, and after the dropwise addition is completed, keep warm at 110-120°C for 1 hour;

[0034] (2) Keep the reactants of the first step at 110-120°C, mix 40.5g methyl methacrylate, 18g hydroxyethyl methacrylate, 16g butyl acrylate, 7.5g methacrylic acid, 3g benzyl peroxide Acyl, 0.3g of tert-butyl peroxybenzoate were ...

Embodiment 3

[0038] This example demonstrates an aqueous dispersion of a hydroxyacrylic resin containing a styrene monomer component, as follows:

[0039] (1) Add 40g propylene glycol butyl ether, 40g No. 100 solvent oil into the reaction vessel and stir evenly to raise the temperature to 110-120°C, and bubble nitrogen for 30 minutes; add 50g methyl methacrylate, 60g styrene, 90g methacrylate hydroxyl Ethyl ester, 36g butyl methacrylate, 40g butyl acrylate, 40g isooctyl acrylate, 10g benzoyl peroxide, and 1g tert-butyl peroxybenzoate were mixed and stirred evenly to obtain a monomer mixture. After the nitrogen gas is completed, add the monomer mixture dropwise into the reactor, and control the dropping speed so that the monomer mixture is added dropwise within 3 hours, and after the dropwise addition is completed, keep warm at 110-120°C for 1 hour;

[0040] (2) Keep the reactants of the first step at 110-120°C, mix 20.5g methyl methacrylate, 20g styrene, 18g hydroxyethyl methacrylate, 16g ...

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Abstract

The invention relates to a hydroxy acrylic resin dispersoid and a waterborne coating prepared from the same. Resin is obtained by two-step polymerization, amine is added to perform neutralization, andwater is added to disperse the resin to obtain the stably stored hydroxy acrylic resin dispersoid with a core-shell structure. Two steps include: first, preparing a hydrophobic portion by free radical solution polymerization; second, preparing a hydrophilic portion by free radical solution polymerization. The hydroxy acrylic resin dispersoid has the core-shell layered structure and has the advantages of high solid content, low viscosity and the like. The two-component waterborne acrylic coating prepared by the method can combine the advantages of an acrylic coating and a polyurethane coating,has excellent physical performance, chemical performance and appearance performance, has the advantages of high paint film crosslinking density and hardness, good toughness and chemical medium resistance, high drying speed, capability of drying at room temperature and the like, and is widely applied to priming paint, finishing paint and priming and finishing combined paint of various engineeringmachinery and automobiles.

Description

technical field [0001] The invention relates to the field of chemical water-based coatings, in particular to a hydroxyacrylic resin dispersion and a water-based coating prepared therefrom. Background technique [0002] With the strengthening of people's awareness of environmental protection and the implementation of government environmental protection policies, traditional solvent-based coatings are strictly restricted due to the release of volatile organic compounds (VOC) and harmful air pollutants (HAP), while environmentally friendly water-based coatings It is widely favored by the market. Waterborne hydroxyacrylic coatings have excellent weather resistance and outdoor aging resistance, low price, physical properties such as glass transition temperature, molecular weight, and functional groups are easy to control, and the performance can be adjusted in a wide range. It is precisely because of these advantages that waterborne coatings based on waterborne hydroxyacrylic re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F265/04C08F220/14C08F220/20C08F220/18C08F220/06C08F212/08C09D175/04C09D5/08
CPCC08F265/04C08F265/06C09D5/08C09D175/04C08F212/08C08F220/1804
Inventor 隆美林王泽群蒋红娟陶威徐延明林杨王炳珅
Owner CHANGZHOU HUAKE POLYMERS
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