Baking type waterborne acrylic coating composition with excellent thixotropy and preparation method thereof

A water-based acrylic and composition technology, applied in the direction of coating, etc., can solve the problems of decreased coating viscosity, coating sag, destroying the thixotropic effect of polyurethane thickeners, etc., to achieve the effect of improving strength and increasing system viscosity

Active Publication Date: 2020-10-16
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, during the construction process of baking-type water-based acrylic coatings, since the baking temperature is generally above 140°C, the viscosity of the coating during the construction process will drop significantly due to the increase in temperature, resulting in the current baking-type water-based acrylic coatings. hang
At present, rheological additives are mainly used to solve the sag problem, such as polyurethane thickeners, but in fact, the anti-sag effect of rheological additives at high temperatures is not ideal
In addition, a certain amount of co-solvent needs to be added to the baking-type water-based acrylic coating system. The existence of co-solvent will destroy the thixotropic effect of polyurethane thickener, and the coating is more likely to sag during the construction process, especially on the facade. In spraying construction, the problem of paint sagging is more serious

Method used

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  • Baking type waterborne acrylic coating composition with excellent thixotropy and preparation method thereof
  • Baking type waterborne acrylic coating composition with excellent thixotropy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The baking-type water-based acrylic coating composition with excellent thixotropy of the present embodiment is mainly made of the following raw materials: functional filler A 0.2g DY CE, 12g deionized water, 35g hydroxyl-functionalized water-based resin containing tertiary amino groups, 3.2g water-based amino resin Resimene 717, 5g cosolvent A ethylene glycol butyl ether, 0.2g dispersant EDAPLAN 490, 0.2g leveling Agent BYK-348, 0.1g defoamer BYK-025, 0.1g pH regulator N,N-dimethylethanolamine, 9g titanium dioxide R902+, 2g pu carbon black, 28.6g precipitated barium sulfate, 0.4g rheology additive BYK-420, 4g co-solvent B ethylene glycol butyl ether.

[0043] The preparation method of the baking type waterborne acrylic paint composition with excellent thixotropy of the present embodiment may further comprise the steps:

[0044] 1) Preparation of functional filler pre-gel liquid GEL-1:

[0045] Add 12 grams of deionized water into the reaction bottle, start the stirri...

Embodiment 2

[0054] The baking type water-based acrylic coating composition with excellent thixotropy of this embodiment is mainly made of the following raw materials: 0.05g functional filler A LT, 10g deionized water, 30g hydroxyl-functionalized water-based resin containing tertiary amino groups, 4.5g water-based amino resin CYMEL 325, 1.5g co-solvent A ethylene glycol butyl ether, 3g co-solvent A propylene glycol methyl ether, 0.8g dispersion Agent DISPERBYK-190, 0.1g leveling agent BYK-348, 0.65g defoamer Foamex 810, 0.05g pH regulator triethylamine, 4g titanium dioxide R 902+, 1g pu carbon black, 40g precipitated barium sulfate, 0.85g rheological additive BYK-D 420, 3.5g cosolvent B butyl glycol ether .

[0055] The preparation method of the baking type waterborne acrylic paint composition with excellent thixotropy of the present embodiment may further comprise the steps:

[0056] 1) Preparation of functional filler pre-gel liquid GEL-2:

[0057] Add 10 grams of deionized water in...

Embodiment 3

[0066] The baking-type waterborne acrylic coating composition with excellent thixotropy of this embodiment is mainly made of the following raw materials: 0.45g functional filler A DY CE, 15g deionized water, 38g hydroxyl-functionalized water-based resin containing tertiary amino groups, 2.5g water-based amino resin Resimene 717, 5g co-solvent A ethylene glycol butyl ether, 3g co-solvent A propylene glycol methyl ether, 0.1g dispersion Agent EDAPLAN 490, 0.55g leveling agent BYK-348, 0.2g defoamer BYK-025, 0.4g pH regulator N,N-dimethylethanolamine, 15g titanium dioxide R 902+, 10g calcium carbonate, 0.1g BYK -420, 9.7g co-solvent B ethylene glycol butyl ether.

[0067] The preparation method of the baking type waterborne acrylic paint composition with excellent thixotropy of the present embodiment may further comprise the steps:

[0068] 1) Preparation of functional filler pre-gel liquid GEL-3:

[0069] Add 15 grams of deionized water into the reaction bottle, start the sti...

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Abstract

The invention relates to the technical field of coatings, specifically to a baking type waterborne acrylic coating composition with excellent thixotropy and a preparation method thereof. The coating composition provided by the invention is prepared from the following main raw materials by weight: 0.05 to 0.45% of a functional filling material A, 10 to 15% of deionized water, 30 to 38% of tertiaryamine group containing hydroxyl-functionalized waterborne acrylic resin, 2.5 to 4.5% of waterborne amino resin, 4.5 to 8% of a cosolvent A, 0.1 to 0.8% of a dispersant, 0.1 to 0.55% of a leveling agent, 0.1 to 0.65% of an anti-foaming agent, 0.05 to 0.4% of a pH regulator, 5 to 15% of a pigment, 10 to 40% of a filling material B, 0.1 to 0.85% of a rheological auxiliary agent and 3.5 to 9.7% of a cosolvent B, wherein the functional filling material A is hectorite or flaky silicate. The coating provided by the invention has excellent thixotropy, sag resistance and stone-bumping resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a baking-type water-based acrylic coating composition with excellent thixotropy and a preparation method thereof. Background technique [0002] The baking-type water-based acrylic coating is mainly prepared by using water-based hydroxyacrylic resin as the film-forming resin, adding water-based amino resin, adding pigments and fillers and water-based additives, and grinding and dispersing. At present, during the construction process of baking-type water-based acrylic coatings, since the baking temperature is generally above 140°C, the viscosity of the coating during the construction process will drop significantly due to the increase in temperature, resulting in the current baking-type water-based acrylic coatings. hang. At present, rheological additives are mainly used to solve the sag problem, such as polyurethane thickeners, but in fact, the anti-sag effect of rheological add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/08C09D7/61C08F220/18C08F220/20C08F220/06C08F220/34C08F220/14C08F212/08
CPCC08F220/18C08F220/1804C09D7/61C09D133/14C08L61/20C08K13/02C08K3/346C08F220/20C08F220/06C08F220/34C08F220/14C08F212/08
Inventor 许飞张汉青庄振宇胡中周丽张玉兴陈卫东王艳艳刘汉功祝宝英刘明刘睿丁帮勇刘益阳陈兴兰
Owner CHINA NAT OFFSHORE OIL CORP
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