CN102731052B - Aqueous organic-inorganic composite coating and preparation method thereof - Google Patents

Abstract

The invention discloses an aqueous organic-inorganic composite coating, comprising the base materials of water-soluble film-forming material, pigment, filler, additive and water. The aqueous organic-inorganic composite coating is specifically composed of the following component, by weight: 15-25 parts of potassium silicate, 10-20 parts of styrene-acrylic emulsion, 0.2-0.5 part of stabilizer, 0.2-0.5 part of dispersing agent, 0.3-0.6 part of defoaming agent, 0.2-0.5 part of film-forming additive, 0.2-0.5 part of antifreeze, 0.1-0.3 part of thickening agent, 14-20 parts of titanium dioxide, 15-25 parts of heavy calcium, 5-10 parts of talcum powder and 20-25 parts of water. The invention has the following advantages: high film hardness, no cracking, excellent weather fastness, lasting replenished film, no addition of preservatives, excellent environmental protection performance, long recoating period of film and resource saving. In addition, the product has minimal construction resistance, and is easy for painting, promotion and application. The aqueous organic-inorganic composite coating has wide application range, and can be applied to coating of basement, underground parking, inner wall and outer wall.

Description

Waterborne organic-inorganic composite coating and preparation method thereof

【Technical field】

The invention relates to the field of coatings, in particular to a water-based organic-inorganic composite coating and a preparation method thereof.

【Background technique】

With the improvement of people's living standards, people's demand for coating types is gradually increasing, and people pay more attention to the green environmental protection of products. For cement-based concrete exterior walls and basements, due to the strong alkalinity, high humidity and high hardness requirements of the walls, after ordinary latex paint is applied, it is prone to poor adhesion, low hardness, efflorescence, mildew and easy peeling And other disadvantages, not suitable for concrete base surface construction.

At present, there are few domestic coatings suitable for concrete base surface construction. Therefore, developing a coating with good film adhesion, high hardness, water resistance, alkali resistance, temperature change resistance, weather resistance and environmental protection performance will increase the economic and environmental benefits. It is very remarkable and has broad application and development prospects.

【Content of invention】

The object of the present invention is to solve the problems in the above-mentioned prior art, and provide a water-based organic-inorganic composite coating with excellent performance and energy saving.

Another object of the present invention is to provide a method for preparing a waterborne organic-inorganic composite coating.

In order to achieve the above object, the technical solution adopted in the present invention is: water-based organic-inorganic composite coating, composed of components such as base material (water-soluble film-forming substance), pigment, filler, auxiliary agent and water, which specifically consists of the following parts by weight The components of a number are:

Described potassium silicate can select the product of the label DY-403 or DY-404 produced by Xingtai Dayang Chemical Co., Ltd., the product of the label HXY205 or HXY204 produced by Laiyang Hengxin Chemical Co., Ltd., or the product produced by Jiangsu Guolian Technology Co., Ltd. Products labeled GHSK.

The styrene-acrylic emulsion can be selected from the ECO502 odor-cleaning emulsion or 296D-S styrene-acrylic emulsion produced by BASF Co., Ltd., and the 998A emulsion produced by Badfu Industrial Co., Ltd., Shunde District, Foshan City.

The stabilizer is a quaternary ammonium compound, and the SPS produced by Clariant Chemical (China) Co., Ltd. is selected.

The defoamer is a mineral oil defoamer, and the SN-NXZ defoamer produced by Japan Nopco Auxiliary Co., Ltd. is selected for use.

Described dispersant is polycarboxylate sodium salt dispersant, selects the U.S. Dow Chemical Company to produce Quick and easy dispersant.

Described thickener is cellulose, preferably adopts hydroxyethyl cellulose thickener, can select the thickener that the model of Akzo Nobel Company produces is HS30000 for use, this thickener has good compatibility and stability with the system, The viscosity is stable after storage.

The antifreezing agent adopts ethylene glycol, which can be selected from the ethylene glycol produced by Guangzhou Chenfeng Chemical Co., Ltd. The antifreeze agent has high antifreeze efficiency and high cost performance.

The film-forming aid is 2,2,4-trimethyl-1,3-pentanediol-isobutyrate, and the film-forming aid produced by Eastman Chemical Company is TEXANOL.

The titanium dioxide is of rutile type, and the titanium dioxide of the model R-706 produced by DuPont Company of the United States is selected.

The heavy calcium adopts 800-1250 mesh heavy calcium, and the model produced by the Swiss Omya Group can be selected as Omyacard 2 or Omyacard 5 heavy calcium.

Described talcum powder adopts 1000-1250 mesh talcum powder, can select the talcum powder produced by Heshan Chemical (Liaoning) Co., Ltd. for use.

A kind of preparation method of waterborne organic-inorganic composite coating, the steps that it comprises are as follows:

(1) Pre-mixing: Add 13 to 17 parts of water in the dispersion tank, and then add the above parts by weight of stabilizer, dispersant, defoamer, film-forming aid, antifreeze and thickener, fully Stir and mix to form a gel-like mixture, and the speed of mixing and stirring is controlled at 300-500rpm;

(2) Grinding and dispersing: Add the above-mentioned parts by weight of titanium dioxide, heavy calcium, and talcum powder into the dispersing tank, control the rotation speed at 1500-2500rpm, beat and grind for 20-25 minutes, until the fineness is less than 50um;

(3) Adding film-forming substances: After adding styrene-acrylic emulsion into the dispersion tank, the stirring speed is controlled at 1000-1500rpm, and the stirring is uniform; then potassium silicate is added, and the stirring speed is controlled at 1000-1500rpm, and the stirring is uniform;

(4) Adding additives: add the remaining water in sequence in the dispersion tank, stir and mix evenly, and control the speed of mixing and stirring at 800-1200rpm to obtain a water-based organic-inorganic composite coating.

(5) Packaging: Pack the paint in paint cans of different volumes according to requirements.

In the present invention, potassium silicate, an inorganic film-forming substance, is used in the coating, and the coating has excellent alkali resistance, weather resistance and heat resistance after its addition, and the heat resistance temperature can reach 500-600 °C, and it has a strong bond with the inorganic substrate. Excellent adhesion; with humidity control, anti-condensation, high film hardness. Furthermore, because the pH of sodium silicate potassium silicate is greater than 13, the coating system does not have an environment for bacterial growth and does not need to add anti-corrosion and anti-mold agents. The paint film has self-corrosion and anti-mold functions, thereby reducing product costs and having excellent environmental performance. In addition, due to its inherent characteristics, potassium silicate water glass has some disadvantages as a coating base material, such as: poor water resistance, hard and brittle coating film, inelasticity, easy to crack, and poor adhesion with organic materials, paint film Porous, so impermeability is poor. Synthetic resin emulsion is used as an auxiliary film-forming material in combination with inorganic base materials such as potassium silicate. Organic resin can be filled in the gaps of the -Si-O-Si-network structure to shield the remaining hydroxyl groups and improve the water resistance of the paint film. Synthetic The resin has better elasticity, can improve the cracking resistance of the paint film, and has better flexibility. The synthetic resin coating film is dense, which can improve the penetration resistance of the paint film. After the composite use of inorganic potassium silicate and styrene-acrylic emulsion, the paint film has good adhesion, high hardness, no cracking, water resistance, alkali resistance, temperature change resistance, weather resistance and environmental protection performance. At the same time, when the two are used in combination, the stability of the mixed system can only be guaranteed if the electrical properties are consistent, otherwise there will be gelation of potassium silicate and demulsification of the emulsion and no stable coating can be obtained.

Compared with the prior art, the present invention has the following advantages: high hardness of the paint film, no cracking, excellent weather resistance, durable paint film, no anti-corrosion and anti-fungal agent, excellent environmental performance, long recoating period of the paint film, saving In addition, the product construction resistance is extremely small, easy to paint, and easy to promote and use. It has a wide range of applications and can be applied to basements, underground parking lots, interior walls and exterior walls.

【Description of drawings】

Fig. 1 is organic-inorganic composite coating of the present invention and existing common organic coating temperature-resistance contrast figure (wherein 1-1 is organic-inorganic composite coating, and 1-2 is existing common organic coating);

Fig. 2 is organic-inorganic composite coating of the present invention and existing common organic coating paint film mildewproof performance comparison (2-1 is existing common organic coating, and 2-2 is organic-inorganic composite coating);

Fig. 3 is the comparison of the anti-cracking performance of the organic-inorganic composite coating of the present invention and the existing composite coating (3-1 is the existing composite coating, 3-2 is the organic-inorganic composite coating of the present invention).

【Detailed ways】

The bilateral ultrasonic welding machine of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

The water-based organic-inorganic composite coating is composed of components such as base material (water-soluble film-forming substance), pigment, filler, auxiliary agent and water, and it is specifically composed of the following components by weight:

Example 2

The water-based organic-inorganic composite coating is composed of components such as base material (water-soluble film-forming substance), pigment, filler, auxiliary agent and water, and it is specifically composed of the following components by weight:

Example 3

The water-based organic-inorganic composite coating is composed of components such as base material (water-soluble film-forming substance), pigment, filler, auxiliary agent and water, and it is specifically composed of the following components by weight:

Example 4

The water-based organic-inorganic composite coating is composed of components such as base material (water-soluble film-forming substance), pigment, filler, auxiliary agent and water, and it is specifically composed of the following components by weight:

Example 5

The water-based organic-inorganic composite coating is composed of components such as base material (water-soluble film-forming substance), pigment, filler, auxiliary agent and water, and it is specifically composed of the following components by weight:

Example 6

The water-based organic-inorganic composite coating is composed of components such as base material (water-soluble film-forming substance), pigment, filler, auxiliary agent and water, and it is specifically composed of the following components by weight:

The preparation method of described waterborne organic-inorganic composite coating, the steps that it comprises are as follows:

(1) Pre-mixing: Add 13 to 17 parts of water in the dispersion tank, and then add the above parts by weight of stabilizer, dispersant, defoamer, film-forming aid, antifreeze and thickener, fully Stir and mix to form a gel-like mixture, and the speed of mixing and stirring is controlled at 300-500rpm;

(2) Grinding and dispersing: Add the above-mentioned parts by weight of titanium dioxide, heavy calcium, and talcum powder into the dispersing tank, control the rotation speed at 1500-2500rpm, beat and grind for 20-25 minutes, until the fineness is less than 50um;

(3) Adding film-forming substances: After adding styrene-acrylic emulsion into the dispersion tank, the stirring speed is controlled at 1000-1500rpm, and the stirring is uniform; then potassium silicate is added, and the stirring speed is controlled at 1000-1500rpm, and the stirring is uniform;

(4) Adding additives: add the remaining water in sequence in the dispersion tank, stir and mix evenly, and control the speed of mixing and stirring at 800-1200rpm to obtain a water-based organic-inorganic composite coating.

(5) Packaging: Pack the paint in paint cans of different volumes according to requirements.

The potassium silicate mentioned above can preferably be produced by Xingtai Dayang Chemical Co., Ltd. with product labels DY-403 and DY-404, HXY205 and HXY204 produced by Laiyang Hengxin Chemical Co., Ltd., or GHSK produced by Jiangsu Guolian Technology Co., Ltd. . The styrene-acrylic emulsion can be preferably ECO502, 296D-S emulsion produced by BASF Co., Ltd., and 998A emulsion produced by Badfu Industrial Co., Ltd., Shunde District, Foshan City. The stabilizer is a quaternary ammonium compound, and the SPS produced by Clariant Chemical (China) Co., Ltd. is selected. The defoamer is a mineral oil defoamer, and the NXZ defoamer produced by Japan Nopco Auxiliary Co., Ltd. is selected for use. Described dispersant is polycarboxylate sodium salt dispersant, selects the U.S. Dow Chemical Company to produce Quick and easy dispersant. Described thickener is cellulose, preferably adopts hydroxyethyl cellulose thickener, can select the thickener that the model of Akzo Nobel Company produces is HS30000 for use, this thickener has good compatibility and stability with the system, The viscosity is stable after storage. The antifreezing agent adopts ethylene glycol, which can be selected from the ethylene glycol produced by Guangzhou Chenfeng Chemical Co., Ltd. The antifreeze agent has high antifreeze efficiency and high cost performance. The film-forming aid is 2,2,4-trimethyl-1,3-pentanediol-isobutyrate, and the film-forming aid produced by Eastman Chemical Company is TEXANOL. The titanium dioxide is of rutile type, and the titanium dioxide of the model R-706 produced by DuPont Company of the United States is selected. The heavy calcium is 800-1250 mesh heavy calcium, which can be Omyacard 2 or Omyacard 5 heavy calcium produced by Swiss Omya Group. Described talcum powder adopts 1000-1250 mesh talcum powder, can select the talcum powder produced by Heshan Chemical (Liaoning) Co., Ltd. for use.

Product performance test:

The product performance test is carried out in accordance with the standards stipulated in the national standard JG/T26-2002 inorganic architectural coatings for exterior walls. The test results are shown in the following table:

project National standard JG/T26-2002 technical indicators Organic-inorganic composite coating of the present invention state in container No agglomeration after stirring, in a uniform state No agglomeration after stirring, in a uniform state Construction Brush two coats barrier-free Brush two coats barrier-free Coating Appearance The appearance of the coating film is normal The appearance of the coating film is normal Contrast Ratio (White and Light) ≥0.95 0.96 Thermal storage stability (30d) No caking, condensation, mildew phenomenon No caking, condensation, mildew phenomenon Low temperature storage stability (3 times) No agglomeration and aggregation No agglomeration and aggregation Surface drying time/h ≤2 1 Scrub resistance (times) ≥1000 10000 Water resistance (168h)  No blistering, cracking, peeling, slight powder shedding is allowed  No blistering, cracking, peeling, no powder falling Alkali resistance (168h)  No blistering, cracking, peeling, slight powder shedding is allowed  No blistering, cracking, peeling, no powder falling Resistance to thermal denaturation (10 times)  No blistering, cracking, peeling, slight powder shedding is allowed  No blistering, cracking, peeling, no powder falling Stain resistance/%I ≤20% 15% Artificial aging resistance (white and light No blistering, cracks, peeling, pulverization ≤ grade 1, change  No blistering, cracking, peeling, powdering level 0,

color) (II500h) Color ≤ Grade 2 Discoloration level 0, qualified

It can be seen from the above table that the water-based organic-inorganic composite coating of the present invention meets the standards stipulated in the national standard JG/T26-2002 inorganic architectural coatings for exterior walls.

As shown in Figure 1, comparing the water-based organic-inorganic composite paint of the present invention with the temperature-change resistance of common organic coatings on the market, it can be drawn that the present invention has excellent temperature-change resistance, and the paint film has no chalking resistance. phenomenon.

As shown in Figure 2, organic-inorganic composite coating of the present invention compares with common organic coating paint film mildewproof property, and organic-inorganic composite coating (not adding antifungal agent) compares with common organic coating (adding antifungal agent) antifungal performance , It was found that the organic-inorganic composite coating has better anti-mold performance than the organic coating with preservatives added on the market.

As shown in Figure 3, compared with the organic-inorganic composite coatings sold in the market, the present invention has better crack resistance and can effectively prevent cracking of the paint film.

The above are only preferred embodiments of the present invention, and should not limit the scope of the present invention with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the description of the invention are all Still belong to the scope that the patent of the present invention covers.

Claims (4)

1. water-based organic and inorganic composite coating, is characterized in that, is made up of: the component of following weight part

The preparation method of described water-based organic and inorganic composite coating, it step comprising is as follows:

(1) pre-mixing: add the water of 13～17 parts in dispersion cylinder, and then add respectively stablizer, dispersion agent, defoamer, film coalescence aid, frostproofer and the thickening material of above parts by weight, be fully uniformly mixed the jellied mixture of shape;

(2) grinding distribution: at the titanium dioxide, coarse whiting, the talcum powder that disperse to add in cylinder above-mentioned parts by weight, making beating is ground to fineness and is less than 50um;

(3) add filmogen: in dispersion cylinder, add after benzene emulsion, stir; Add again potassium silicate, stir;

(4) add auxiliary agent: disperseing to add successively remaining water in cylinder, be uniformly mixed.

2. water-based organic and inorganic composite coating according to claim 1, is characterized in that, described film coalescence aid adopts 2,2,4-trimethylammonium-1,3-pentanediol-isobutyrate.

3. according to the preparation method of the water-based organic and inorganic composite coating described in claim 1 or 2, it is characterized in that, it step comprising is as follows:

(1) pre-mixing: add the water of 13～17 parts in dispersion cylinder, and then add respectively stablizer, dispersion agent, defoamer, film coalescence aid, frostproofer and the thickening material of above parts by weight, be fully uniformly mixed the jellied mixture of shape;

(2) grinding distribution: at the titanium dioxide, coarse whiting, the talcum powder that disperse to add in cylinder above-mentioned parts by weight, making beating is ground to fineness and is less than 50um;

(3) add filmogen: in dispersion cylinder, add after benzene emulsion, stir; Add again potassium silicate, stir;

(4) add auxiliary agent: disperseing to add successively remaining water in cylinder, be uniformly mixed.

4. the preparation method of water-based organic and inorganic composite coating according to claim 3, is characterized in that, in described (1) step, the rotating speed of mix and blend is controlled at 300～500rpm; (2) in step, the rotating speed that making beating is ground is at 1500～2500rpm, and the time is 20～25 minutes.