阅读说明：本技术 一种低voc高光水性钢桶外壁涂料及其制备方法 (Low-VOC high-gloss water-based steel drum outer wall coating and preparation method thereof ) 是由 周国治 杜高平 邢建阳 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种低VOC高光水性钢桶外壁涂料及其制备方法,该涂料包括下列重量份数的原料：水性羟基丙烯酸分散体50-62份,水性色浆20-30份,氨基树脂6-12份,去离子水6-7份,消泡剂0.05-0.2份,润湿剂0.1-0.3份,流平剂0.1-0.3份,附着力促进剂0.5-3份,酸催化剂0.1-0.3份,聚氨酯增稠剂0.4-0.6份,4％有机膨润土防沉浆剂1-3份。本发明产品施工性良好、不流挂,不堵塞管道,不堵枪；产品开稀后不会影响其贮存和颜色的稳定性,树脂自带的假稠性及膨润土防沉浆的双重作用,即使开稀后也非常稳定。产品在生产工艺中几乎没有添加溶剂产品,保证非常低的VOC。(The invention discloses a low-VOC high-gloss water-based steel drum outer wall coating and a preparation method thereof, wherein the coating comprises the following raw materials in parts by weight: 50-62 parts of water-based hydroxyl acrylic acid dispersoid, 20-30 parts of water-based color paste, 6-12 parts of amino resin, 6-7 parts of deionized water, 0.05-0.2 part of defoaming agent, 0.1-0.3 part of wetting agent, 0.1-0.3 part of flatting agent, 0.5-3 parts of adhesion promoter, 0.1-0.3 part of acid catalyst, 0.4-0.6 part of polyurethane thickener and 1-3 parts of 4% organic bentonite anti-settling agent. The product of the invention has good construction performance, does not sag, does not block a pipeline, and does not block a gun; the product does not affect the storage and color stability after being diluted, and the resin has the double functions of pseudo-consistency and bentonite anti-settling slurry, and is very stable even after being diluted. The product is almost free of solvent products in the production process, and very low VOC is guaranteed.)

1. The low-VOC high-gloss water-based paint for the outer wall of the steel barrel is characterized by comprising the following raw materials in parts by weight: 50-62 parts of water-based hydroxyl acrylic acid dispersoid, 20-30 parts of water-based color paste, 6-12 parts of amino resin, 6-7 parts of deionized water, 0.05-0.2 part of defoaming agent, 0.1-0.3 part of wetting agent, 0.1-0.3 part of flatting agent, 0.5-3 parts of adhesion promoter, 0.1-0.3 part of acid catalyst, 0.4-0.6 part of polyurethane thickener and 1-3 parts of 4% organic bentonite anti-settling agent.

2. The low-VOC high-gloss water-based steel drum outer wall coating material according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 56 parts of aqueous hydroxyl acrylic acid dispersoid, 26 parts of aqueous color paste, 10 parts of amino resin, 6.3 parts of deionized water, 0.1 part of defoaming agent, 0.2 part of wetting agent, 0.2 part of flatting agent, 2 parts of adhesion promoter, 0.2 part of acid catalyst, 0.5 part of polyurethane thickener and 2 parts of 4 percent organic bentonite anti-settling agent.

3. The low VOC high gloss water based steel drum outer wall coating of claim 1, wherein: the preparation method of the aqueous hydroxy acrylic acid dispersion comprises the following steps:

1) adding propylene glycol butyl ether and tert-carbonic acid glycidyl ester into a reaction container, preserving heat for 10min at 120 ℃, then heating to 140 ℃ for 130-140 ℃, beginning to dropwise add the front-stage mixed monomer, completing dropwise adding within 1-2h, and preserving heat for 0.5-1 h;

wherein the front-stage mixed monomer comprises the following raw materials in parts by weight: 20-40 parts of methyl methacrylate, 20-40 parts of isooctyl acrylate, 15-25 parts of butyl methacrylate, 30-50 parts of styrene, 20-40 parts of hydroxyethyl acrylate, 4-8 parts of vinyl ethoxy silane, 1-3 parts of tert-butyl peroxybenzoate and 0.5-2 parts of di-tert-butyl peroxide;

2) and (3) dropwise adding a middle-section mixed monomer, finishing dropping for 1-2h, and keeping the temperature for 0.5-1h, wherein the middle-section mixed monomer comprises the following raw materials in parts by weight: 20-40 parts of methyl methacrylate, 15-25 parts of styrene, 5-15 parts of butyl methacrylate, 30-50 parts of butyl acrylate, 4-6 parts of methacrylic acid, 30-40 parts of hydroxypropyl acrylate, 1-3 parts of vinylmethoxysilane, 1-2 parts of tert-butyl peroxybenzoate and 0.5-2 parts of di-tert-butyl peroxide;

3) dropwise adding a rear-section mixed monomer, dropwise adding for 0.5-1h, and keeping the temperature for 1-1.5h, wherein the rear-section mixed monomer comprises the following raw materials in parts by weight: 30-50 parts of methyl methacrylate, 10-20 parts of styrene, 15-25 parts of butyl methacrylate, 10-20 parts of isooctyl acrylate, 6-10 parts of methacrylic acid, 5-15 parts of acrylamide, 30-40 parts of hydroxyethyl methacrylate, 1-3 parts of vinyl methoxy silane, 0.5-2 parts of tert-butyl peroxybenzoate and 0.1-1 part of di-tert-butyl peroxide;

4) and (3) after the reaction is finished, cooling, adding an alkaline neutralizer when the temperature is reduced to 85-90 ℃, stirring for 20-30min, adding deionized water, adjusting the solid content of the resin to be 45%, and adjusting the viscosity to be 500-2000mPa.s at 25 ℃ to obtain the aqueous modified hydroxyl acrylic acid dispersoid.

4. The low VOC high gloss water based steel drum outer wall coating of claim 3, wherein: in the step 1), the front-stage mixed monomer comprises the following raw materials in parts by weight: 30 parts of methyl methacrylate, 30 parts of isooctyl acrylate, 20 parts of butyl methacrylate, 40 parts of styrene, 30 parts of hydroxyethyl acrylate, 6 parts of vinyl ethoxy silane, 2 parts of tert-butyl peroxybenzoate and 1 part of di-tert-butyl peroxide.

5. The low VOC high gloss water based steel drum outer wall coating of claim 3, wherein: in the step 2), the middle-section mixed monomer comprises the following raw materials in parts by weight: 30 parts of methyl methacrylate, 20 parts of styrene, 10 parts of butyl methacrylate, 40 parts of butyl acrylate, 5 parts of methacrylic acid, 35 parts of hydroxypropyl acrylate, 2 parts of vinylmethoxysilane, 1.5 parts of tert-butyl peroxybenzoate and 1 part of di-tert-butyl peroxide.

6. The low VOC high gloss water based steel drum outer wall coating of claim 3, wherein: in the step 3), the rear-stage mixed monomer comprises the following raw materials in parts by weight: 40 parts of methyl methacrylate, 15 parts of styrene, 20 parts of butyl methacrylate, 15 parts of isooctyl acrylate, 8 parts of methacrylic acid, 10 parts of acrylamide, 35 parts of hydroxyethyl methacrylate, 2 parts of vinylmethoxysilane, 1 part of tert-butyl peroxybenzoate and 0.5 part of di-tert-butyl peroxide.

7. The low-VOC high-gloss water-based paint for the outer wall of the steel barrel according to claim 1, wherein the water-based color paste comprises the following raw materials in parts by weight: 20-30 parts of deionized water, 1-3 parts of dispersing agent, 0.1-0.3 part of defoaming agent, 60-80 parts of pigment, 0.4-0.6 part of wetting agent and 0.4-0.6 part of thickening agent.

8. The low-VOC high-gloss water-based paint for the outer wall of the steel barrel according to claim 7, wherein the water-based color paste comprises the following raw materials in parts by weight: 25 parts of deionized water, 2 parts of dispersing agent, 0.2 part of defoaming agent, 70 parts of pigment, 0.5 part of wetting agent and 0.5 part of thickening agent.

9. The low-VOC high-gloss water-based paint for the outer wall of the steel barrel according to claim 7 or 8, wherein the preparation method of the water-based color paste comprises the following steps: sequentially putting the ionized water, the dispersing agent, the defoaming agent, the pigment, the wetting agent and the thickening agent into a stirring cylinder, fully stirring at the rotating speed of 2000-3000rpm to uniform slurry, and grinding the slurry in a sand mill until the fineness is less than or equal to 15 microns for later use.

10. A method for preparing the low VOC high gloss water based steel drum external wall coating according to claim 1 or 2, comprising the steps of:

and sequentially putting the aqueous hydroxyl acrylic acid dispersoid, the aqueous color paste, the amino resin, the deionized water, the defoaming agent, the wetting agent, the leveling agent, the adhesion promoter, the acid catalyst, the polyurethane thickener and the 4 percent organic bentonite anti-settling agent into a production cylinder according to the proportion, and stirring the mixture to be in a completely uniform state to obtain the low-VOC high-gloss aqueous steel barrel outer wall coating.

Technical Field

The invention relates to the technical field of coatings, and particularly relates to a low-VOC high-gloss water-based steel drum outer wall coating and a preparation method thereof.

Background

The water-based steel drum outer wall coating of suppliers on the existing market has the characteristics of high VOC, easy blockage of construction pipelines, easy precipitation and easy color change of the coating after the coating is diluted and the like, so that the low-VOC high-gloss water-based steel drum outer wall coating is researched and developed. Aiming at enterprises mainly processing and manufacturing steel drum packaging materials with various specifications, attention is increasingly paid to the development of low VOC steel drum outer wall coating.

In the prior art, the problems of high gloss, low price and constructability of the paint for the outer wall of the low-VOC steel drum are difficult to solve. The water-based steel drum exterior coating on the market is basically water-soluble hydroxyl acrylic coating, the gloss can reach more than 90 percent, the VOC content is more than 300 g/L, the drying speed can be adjusted by various hydrophilic solvents in the construction property, and the purposes of no sagging and no color cross are achieved. But the defects are obvious, the VOC is high, and the gun is easy to block in the construction property; because the water-soluble resins all have a swelling point, the water-soluble resins become thicker or even insoluble when water is added to the swelling point, so that the water-soluble resins are easy to block guns and pipes; and the diluted coating is not easy to store and is easy to precipitate and discolor.

The pure water paint and water are mixed in any ratio, so that the problems of gun blockage and pipe blockage are avoided; however, the influence of gloss is large, the gloss of pure water colored paint generally does not exceed 85%, and high gloss can be achieved by using some monomers with higher price, and the cost is relatively increased by using the monomers. In addition, the construction of pure water paint also has the problems of easy sagging, easy shrinkage and the like.

In view of the above, there is a need to develop a product with moderate price, high gloss, and performance and workability comparable to those of oily and water-soluble paint for the outer wall of steel drum.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a low-VOC high-gloss water-based steel drum outer wall coating and a preparation method thereof.

In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:

a low-VOC high-gloss water-based steel drum outer wall coating comprises the following raw materials in parts by weight: 50-62 parts of water-based hydroxyl acrylic acid dispersoid, 20-30 parts of water-based color paste, 6-12 parts of amino resin, 6-7 parts of deionized water, 0.05-0.2 part of defoaming agent, 0.1-0.3 part of wetting agent, 0.1-0.3 part of flatting agent, 0.5-3 parts of adhesion promoter, 0.1-0.3 part of acid catalyst, 0.4-0.6 part of polyurethane thickener and 1-3 parts of 4% organic bentonite anti-settling agent.

Further, in the low-VOC high-gloss water-based steel drum outer wall coating, the coating comprises the following raw materials in parts by weight: 56 parts of aqueous hydroxyl acrylic acid dispersoid, 26 parts of aqueous color paste, 10 parts of amino resin, 6.3 parts of deionized water, 0.1 part of defoaming agent, 0.2 part of wetting agent, 0.2 part of flatting agent, 2 parts of adhesion promoter, 0.2 part of acid catalyst, 0.5 part of polyurethane thickener and 2 parts of 4 percent organic bentonite anti-settling agent.

Further, in the low-VOC high-gloss water-based steel drum outer wall coating, the preparation method of the water-based hydroxyacrylic acid dispersion comprises the following steps:

1) adding propylene glycol butyl ether and tert-carbonic acid glycidyl ester into a reaction container, preserving heat for 10min at 120 ℃, then heating to 140 ℃ for 130-140 ℃, beginning to dropwise add the front-stage mixed monomer, completing dropwise adding within 1-2h, and preserving heat for 0.5-1 h;

wherein the front-stage mixed monomer comprises the following raw materials in parts by weight: 20-40 parts of methyl methacrylate, 20-40 parts of isooctyl acrylate, 15-25 parts of butyl methacrylate, 30-50 parts of styrene, 20-40 parts of hydroxyethyl acrylate, 4-8 parts of vinyl ethoxy silane, 1-3 parts of tert-butyl peroxybenzoate and 0.5-2 parts of di-tert-butyl peroxide;

2) and (3) dropwise adding a middle-section mixed monomer, finishing dropping for 1-2h, and keeping the temperature for 0.5-1h, wherein the middle-section mixed monomer comprises the following raw materials in parts by weight: 20-40 parts of methyl methacrylate, 15-25 parts of styrene, 5-15 parts of butyl methacrylate, 30-50 parts of butyl acrylate, 4-6 parts of methacrylic acid, 30-40 parts of hydroxypropyl acrylate, 1-3 parts of vinylmethoxysilane, 1-2 parts of tert-butyl peroxybenzoate and 0.5-2 parts of di-tert-butyl peroxide;

3) dropwise adding a rear-section mixed monomer, dropwise adding for 0.5-1h, and keeping the temperature for 1-1.5h, wherein the rear-section mixed monomer comprises the following raw materials in parts by weight: 30-50 parts of methyl methacrylate, 10-20 parts of styrene, 15-25 parts of butyl methacrylate, 10-20 parts of isooctyl acrylate, 6-10 parts of methacrylic acid, 5-15 parts of acrylamide, 30-40 parts of hydroxyethyl methacrylate, 1-3 parts of vinyl methoxy silane, 0.5-2 parts of tert-butyl peroxybenzoate and 0.1-1 part of di-tert-butyl peroxide;

4) and (3) after the reaction is finished, cooling, adding an alkaline neutralizer when the temperature is reduced to 85-90 ℃, stirring for 20-30min, adding deionized water, adjusting the solid content of the resin to be 45%, and adjusting the viscosity to be 500-2000mPa.s at 25 ℃ to obtain the aqueous modified hydroxyl acrylic acid dispersoid.

Further, in the low-VOC high-gloss water-based steel drum outer wall coating, in step 1), the front-stage mixed monomer comprises the following raw materials in parts by weight: 30 parts of methyl methacrylate, 30 parts of isooctyl acrylate, 20 parts of butyl methacrylate, 40 parts of styrene, 30 parts of hydroxyethyl acrylate, 6 parts of vinyl ethoxy silane, 2 parts of tert-butyl peroxybenzoate and 1 part of di-tert-butyl peroxide.

Further, in the low-VOC high-gloss water-based steel drum outer wall coating, in the step 2), the middle-section mixed monomer comprises the following raw materials in parts by weight: 30 parts of methyl methacrylate, 20 parts of styrene, 10 parts of butyl methacrylate, 40 parts of butyl acrylate, 5 parts of methacrylic acid, 35 parts of hydroxypropyl acrylate, 2 parts of vinylmethoxysilane, 1.5 parts of tert-butyl peroxybenzoate and 1 part of di-tert-butyl peroxide.

Further, in the low-VOC high-gloss water-based steel drum outer wall coating, in the step 3), the rear-section mixed monomer comprises the following raw materials in parts by weight: 40 parts of methyl methacrylate, 15 parts of styrene, 20 parts of butyl methacrylate, 15 parts of isooctyl acrylate, 8 parts of methacrylic acid, 10 parts of acrylamide, 35 parts of hydroxyethyl methacrylate, 2 parts of vinylmethoxysilane, 1 part of tert-butyl peroxybenzoate and 0.5 part of di-tert-butyl peroxide.

Further, in the low-VOC high-gloss water-based steel barrel outer wall coating, the water-based color paste comprises the following raw materials in parts by weight: 20-30 parts of deionized water, 1-3 parts of dispersing agent, 0.1-0.3 part of defoaming agent, 60-80 parts of pigment, 0.4-0.6 part of wetting agent and 0.4-0.6 part of thickening agent.

Further, in the low-VOC high-gloss water-based steel barrel outer wall coating, the water-based color paste comprises the following raw materials in parts by weight: 25 parts of deionized water, 2 parts of dispersing agent, 0.2 part of defoaming agent, 70 parts of pigment, 0.5 part of wetting agent and 0.5 part of thickening agent.

Further, in the low-VOC high-gloss water-based steel barrel outer wall coating, the preparation method of the water-based color paste comprises the following steps: sequentially putting the ionized water, the dispersing agent, the defoaming agent, the pigment, the wetting agent and the thickening agent into a stirring cylinder, fully stirring at the rotating speed of 2000-3000rpm to uniform slurry, and grinding the slurry in a sand mill until the fineness is less than or equal to 15 microns for later use.

The invention also provides a method for preparing the low-VOC high-gloss water-based steel drum outer wall coating, which comprises the following steps:

and sequentially putting the aqueous hydroxyl acrylic acid dispersoid, the aqueous color paste, the amino resin, the deionized water, the defoaming agent, the wetting agent, the leveling agent, the adhesion promoter, the acid catalyst, the polyurethane thickener and the 4 percent organic bentonite anti-settling agent into a production cylinder according to the proportion, and stirring the mixture to be in a completely uniform state to obtain the low-VOC high-gloss aqueous steel barrel outer wall coating.

The invention has the beneficial effects that:

1. the hydroxy acrylic acid dispersion of the present invention can adjust the viscosity of the resin according to the requirements of workability, and maintain good workability and storage stability.

2. The defoaming agent used in the invention is a defoaming agent with weak defoaming capability, well solves the problem of compatibility with resin, and can effectively prevent oil shrinkage caused by slight oil contamination by adding the wetting agent capable of resisting oil contamination; in order to solve the problem of poor recoating, epoxy phosphate resin is introduced into the formula, so that the recoating can be realized and the water resistance is improved.

3. The product of the invention has good construction performance, does not sag, does not block a pipeline, and does not block a gun; the product does not affect the storage and color stability after being diluted, and the resin has the double functions of pseudo-consistency and bentonite anti-settling slurry, and is very stable even after being diluted. The product is almost free of solvent products in the production process, and very low VOC is guaranteed.

Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a low-VOC high-gloss water-based steel drum outer wall coating which comprises the following raw materials in parts by weight: 50-62 parts of water-based hydroxyl acrylic acid dispersoid, 20-30 parts of water-based color paste, 6-12 parts of amino resin, 6-7 parts of deionized water, 0.05-0.2 part of defoaming agent, 0.1-0.3 part of wetting agent, 0.1-0.3 part of flatting agent, 0.5-3 parts of adhesion promoter, 0.1-0.3 part of acid catalyst, 0.4-0.6 part of polyurethane thickener and 1-3 parts of 4% organic bentonite anti-settling agent.

In the invention, the hydroxyl value of the aqueous hydroxyl acrylic acid dispersoid is 110, the amino resin is Zhanxin 303-98 amino resin, the defoaming agent is TEGO842 defoaming agent, the wetting agent is Wolk VOK485 wetting agent, the leveling agent is siloco SILOK350, the adhesion promoter is Guanzhi OS-79 aqueous epoxy phosphate adhesion promoter, the acid catalyst is Tongde WD-04 acid catalyst, the polyurethane thickener is 501 polyurethane thickener, and the 4% organic bentonite anti-settling agent is Huate BP-188B organic bentonite anti-settling agent.

In the invention, the preparation method of the aqueous hydroxy acrylic acid dispersion comprises the following steps:

1) adding propylene glycol butyl ether and tert-carbonic acid glycidyl ester into a reaction container, preserving heat for 10min at 120 ℃, then heating to 135 ℃, beginning to dropwise add the front-stage mixed monomer, completing dropwise adding for 90min, and preserving heat for 45 min;

wherein the front-stage mixed monomer comprises the following raw materials in parts by weight: 30 parts of methyl methacrylate, 30 parts of isooctyl acrylate, 20 parts of butyl methacrylate, 40 parts of styrene, 30 parts of hydroxyethyl acrylate, 6 parts of vinyl ethoxy silane, 2 parts of tert-butyl peroxybenzoate and 1 part of di-tert-butyl peroxide;

2) and (3) dropwise adding a middle-section mixed monomer, finishing dropping for 90min, and keeping the temperature for 45min, wherein the middle-section mixed monomer comprises the following raw materials in parts by weight: 30 parts of methyl methacrylate, 20 parts of styrene, 10 parts of butyl methacrylate, 40 parts of butyl acrylate, 5 parts of methacrylic acid, 35 parts of hydroxypropyl acrylate, 2 parts of vinyl methoxy silane, 1.5 parts of tert-butyl peroxybenzoate and 1 part of di-tert-butyl peroxide;

3) dropwise adding a rear-section mixed monomer, after 45min, keeping the temperature for 75min, wherein the rear-section mixed monomer comprises the following raw materials in parts by weight: 40 parts of methyl methacrylate, 15 parts of styrene, 20 parts of butyl methacrylate, 15 parts of isooctyl acrylate, 8 parts of methacrylic acid, 10 parts of acrylamide, 35 parts of hydroxyethyl methacrylate, 2 parts of vinylmethoxysilane, 1 part of tert-butyl peroxybenzoate and 0.5 part of di-tert-butyl peroxide;

4) and (3) after the reaction is finished, cooling, adding an alkaline neutralizing agent when the temperature is reduced to 87 ℃, stirring for 25min, adding deionized water, adjusting the solid content of the resin to be 45%, and adjusting the viscosity to be 1000mPa.s at 25 ℃ to obtain the aqueous modified hydroxy acrylic acid dispersoid.

In the invention, the water-based color paste comprises the following raw materials in parts by weight: 25 parts of deionized water, 2 parts of dispersing agent, 0.2 part of defoaming agent, 70 parts of pigment, 0.5 part of wetting agent and 0.5 part of thickening agent. The preparation method of the water-based color paste comprises the following steps: sequentially putting the ionized water, the dispersing agent, the defoaming agent, the pigment, the wetting agent and the thickening agent into a stirring cylinder, fully stirring at 25000rpm until the mixture is uniform and pasty, and grinding the mixture in a sand mill until the fineness is less than or equal to 15um for later use. Wherein the dispersant is TEGO750W dispersant, the defoamer is TEGO842 defoamer, the wetting agent is Tiger THCH249 wetting agent, and the thickener is TEGO3030 thickener.

The invention provides a preparation method of a low-VOC high-gloss water-based steel drum outer wall coating, which comprises the following steps:

and sequentially putting the aqueous hydroxyl acrylic acid dispersoid, the aqueous color paste, the amino resin, the deionized water, the defoaming agent, the wetting agent, the leveling agent, the adhesion promoter, the acid catalyst, the polyurethane thickener and the 4 percent organic bentonite anti-settling agent into a production cylinder according to the proportion, and stirring the mixture to be in a completely uniform state to obtain the low-VOC high-gloss aqueous steel barrel outer wall coating. When the low-VOC highlight water-based steel barrel outer wall coating is used for construction, 10-20% of water by weight of the low-VOC highlight water-based steel barrel outer wall coating is added for boiling and spraying, and the drying condition is 150-.

The SGS report number of the low VOC high gloss water-based steel drum outer wall coating provided by the invention is as follows: GZHL2012062244OT, which shows that the VOC content of the water-based steel drum outer wall coating is 89 g/L.

The following embodiments are relevant to the present invention:

example 1

A low-VOC high-gloss water-based steel drum outer wall coating comprises the following raw materials in parts by weight: 56 parts of aqueous hydroxyl acrylic acid dispersoid, 26 parts of aqueous color paste, 10 parts of amino resin, 6.3 parts of deionized water, 0.1 part of defoaming agent, 0.2 part of wetting agent, 0.2 part of flatting agent, 2 parts of adhesion promoter, 0.2 part of acid catalyst, 0.5 part of polyurethane thickener and 2 parts of 4 percent organic bentonite anti-settling agent.

In the embodiment, when the low-VOC high-gloss water-based steel barrel outer wall coating is used for construction, 15% of water by weight of the low-VOC high-gloss water-based steel barrel outer wall coating is added for boiling and spraying, and the drying condition is 160 ℃/10 min.

Example 2

A low-VOC high-gloss water-based steel drum outer wall coating comprises the following raw materials in parts by weight: 62 parts of aqueous hydroxyl acrylic acid dispersoid, 20 parts of aqueous color paste, 6 parts of amino resin, 6 parts of deionized water, 0.2 part of defoaming agent, 0.1 part of wetting agent, 0.1 part of flatting agent, 0.5 part of adhesion promoter, 0.3 part of acid catalyst, 0.4 part of polyurethane thickener and 1 part of 4 percent organic bentonite anti-settling agent.

In this embodiment, when the low-VOC high-gloss water-based steel drum outer wall coating is used in construction, the low-VOC high-gloss water-based steel drum outer wall coating is diluted with 10% of water by weight and sprayed, and the drying condition is 150 ℃/10 min.

Example 3

A low-VOC high-gloss water-based steel drum outer wall coating comprises the following raw materials in parts by weight: 50 parts of water-based hydroxyl acrylic acid dispersoid, 30 parts of water-based color paste, 12 parts of amino resin, 7 parts of deionized water, 0.05 part of defoaming agent, 0.part of wetting agent, 0.3 part of flatting agent, 3 parts of adhesion promoter, 0.1 part of acid catalyst, 0.6 part of polyurethane thickener and 3 parts of 4% organic bentonite anti-settling agent.

In this embodiment, when the low-VOC high-gloss water-based steel drum outer wall coating is used in construction, the low-VOC high-gloss water-based steel drum outer wall coating is diluted with 20% of water by weight and sprayed, and the drying condition is 170 ℃/10 min.

The invention tests the performance of the exterior wall coatings provided in examples 1-3, and the test results are shown in table 1 below:

TABLE 1

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.