CN110684420A

CN110684420A - High-transmittance dustproof anti-fouling matte finish paint and preparation method thereof

Info

Publication number: CN110684420A
Application number: CN201911066487.2A
Authority: CN
Inventors: 梁巧敏; 廖位红; 符思
Original assignee: Guangzhou Hao Special Building Materials Co Ltd
Current assignee: Guangzhou Hao Special Building Materials Co Ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-01-14

Abstract

The invention relates to the technical field of chemical coatings, and discloses a high-transmittance dustproof anti-fouling matte finish coat which comprises the following components in percentage by mass: 34.6 to 55 percent of water; 0.1 to 1 percent of defoaming agent; 35% -65% of acrylic emulsion; 0.1 to 0.4 percent of preservative; 0.5 to 15 percent of antifreeze; 0.2 to 0.5 percent of organic amine neutralizer; 0.5 to 5 percent of odorless coalescing aid; 0.1 to 1 percent of surfactant; 0.1 to 1 percent of thickening agent. The invention adopts the core shell and the acrylic emulsion polymerized by self-crosslinking to match with the Istmann with excellent water resistance

The ester alcohol film forming aid, the RHODOLINE AN-130 organic amine neutralizer, the ACRYSOL AP-10 and the RM8W thickener and the like are matched, so that the water resistance of the coating is enhanced,the paint can well protect the wall base material, prevent the base material from serious paint diseases such as water absorption floating, even peeling and the like, prevent water from being difficultly soaked into the bottom layer from the paint, can not be adhered to the surface of a coating film stubborn, well block stains, and enable the paint to have good stain resistance; in order to meet the saturation of the wall surface base material and not influence the original appearance, no powdery component is added, so that the transparency of the coating is greatly improved.

Description

High-transmittance dustproof anti-fouling matte finish paint and preparation method thereof

Technical Field

The invention relates to the technical field of chemical coatings, in particular to a high-transmittance dustproof anti-fouling matte finish coat and a preparation method thereof.

Background

With the popularization of colored coatings and artistic coatings, people can be protected by finish paint in order to make the color more durable. However, the gloss of the finish paint on the market is different, and the bright finish paint is easily subjected to reflection glare when being used in places with indoor and outdoor lamplight or sunlight irradiation, can cause visual discomfort or visual operation performance reduction, is used outdoors, even causes light pollution, influences the environment and causes pressure on environmental protection. Although the bright finish coat can make the surface reflection of light degree high, light is clear bright, but if wall substrate roughness is poor, unsmooth or the wall has particulate foreign matter can direct influence visual effect, the wall renovates the difficulty even, increases the maintenance degree of difficulty.

In order to reduce the glossiness of finish paint, materials such as silicon dioxide, talcum powder, paraffin are mostly used for extinction at present, and the following problems often occur: (1) the silicon dioxide is used for adjusting the gloss, so that the volume concentration of the pigment is increased, the transparency is reduced, the color of the original wall surface and the fullness of objects are influenced, the viscosity is reduced due to improper selection or dispersion of the silicon dioxide or even excessive amount of the silicon dioxide, other paint diseases are caused due to the increase of the addition amount of the thickening agent, the dispersion is incomplete, the coating with other substances is easy, and the construction effect is influenced; and is prone to precipitation during storage; (2) the talcum powder is used, so that the pigment volume concentration of the paint is obviously increased, the transparency of a dry film of a paint film is influenced, and the color difference and even blurring of the paint film are generated; (3) the transparency is reduced after paraffin is selected to be dried and solidified, so that the color and the truth are influenced.

In addition, the prior matte finish paint is generally varnish, and a cellulose thickener is used in thickening, so that although the thickening efficiency is high, the stability is poor, and the matte finish paint is easy to be biodegraded. And the cellulose has good hydrophilicity, and water absorption in rainy weather or high-humidity environment can reduce the water resistance of a paint film of the paint, so that emulsion settlement occurs on part of products, water is incompatible with an auxiliary agent, finish paint is not uniform, difficulty is increased for construction, even stirring is not performed, so that roller brushing is not uniform, part of places are matte, and part of places are transparent, high in gloss or high in operation color, so that the decorative effect is influenced.

In view of the above, there is a need for a matte finish paint which is suitable for the surface of artistic wall surfaces, exterior wall flat coating, stone-like paint, stone-like coating and the like, has ultralow gloss, high transparency, dust prevention and stain resistance, water resistance and color retention, does not need matting powder and has excellent storage stability.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a high-transmittance dustproof anti-fouling matte finish paint and a preparation method thereof. The matte finish coat disclosed by the invention has the advantages of ultralow gloss, high transparency, dust prevention, stain resistance, water resistance and color retention, does not need matting powder and has excellent storage stability; the light pollution can be reduced, and the environment is protected and safe; the technical requirements for the construction or repair of the base material of the uneven wall surface can be reduced; the defects that the prior finish paint causes blurring to the original color of a wall base material, affects the saturation gloss, causes poor decorative effect due to transparency and the like are overcome; is suitable for the surfaces of artistic wall surfaces, outer wall flat coating, real stone paint, stone-like coating and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

the high-transmittance dustproof anti-fouling matte finish paint comprises the following components in percentage by mass: 34.6 to 55 percent of water; 0.1 to 1 percent of defoaming agent; 35% -65% of acrylic emulsion; 0.1 to 0.4 percent of preservative; 0.5 to 15 percent of antifreeze; 0.2 to 0.5 percent of organic amine neutralizer; 0.5 to 5 percent of odorless coalescing aid; 0.1 to 1 percent of surfactant; 0.1 to 1 percent of thickening agent.

Preferably, the defoaming agent is mineral oil, is used for a delustering water-based paint, has excellent performance, maintains durable defoaming property during the storage of the paint, permeates into a foam system in a form of particles during the mixing process, locally reduces the surface tension of the foam, thins the membrane wall, is strongly pulled by a membrane layer with large surface tension at the periphery, and finally leads to the rupture of bubbles and quick defoaming. The defoamer even contains no silicon, and can be matched with the emulsion to be effective under the conditions oF extreme temperature (even 100 ℃ (212 oF)) and pH value; the chemical property of the paint is a mixture of hydrophobic substances and hydrocarbon of paraffin, so that the paint has a hydrophobic effect and good stain resistance.

Preferably, the acrylic emulsion is a Mowilith DC 832 matte emulsion. The emulsion is prepared from high-impact (Archroma) chemical industry Co., Ltd, carries out polymerization innovation design on the structural form of emulsion particles, and is a matte series product adopting core shell and self-crosslinking polymerization; the core-shell self-crosslinking polymerization is to modify emulsion by changing the structural form of emulsion particles, thereby optimizing the performance of the emulsion paint. The Mowilith DC 832 matte emulsion not only has good paint film performance, but also has excellent environmental protection performance, and is suitable for preparing varnish, colored paint and the like with ultra-low VOC content. The MFT of the Mowilith DC 832 emulsion is about 25 ℃, the film-forming property can be greatly improved by adopting a core-shell and self-crosslinking polymerization technology, even the low-odor solvent-free emulsion paint which can form a film at low temperature even without film-forming additives and cosolvent can be prepared, and the hardness, the anti-sticking property, the stain resistance and the like of a paint film can be improved; in addition, the core-shell and self-crosslinking polymerized latex particles ensure that the more hydrophilic polymer is positioned in the core and the more hydrophobic polymer is positioned in the shell, thereby improving the water resistance and weather resistance of the emulsion and improving the rheological property.

Preferably, the preservative is a cason preservative which is an internationally recognized safe, efficient and broad-spectrum preservative, does not contain any heavy metal, can effectively inhibit and kill bacteria and various microorganisms, can provide stable protection for the coating, has antibacterial performance, and does not contain formaldehyde and other volatile bactericides.

Preferably, the anti-freeze agent is propylene glycol. The propylene glycol has the advantages of freeze thawing stability, low freezing point of water, low content of volatile organic compounds and the like, has low toxicity and strong dissolving power, and is more environment-friendly compared with ethylene glycol and glycol ether.

Preferably, the organic amine neutralizer is RHODOLINE AN-130, a lower odor neutralizer that can replace ammonia and 2-amino 2-methyl-1 propanol (AMP95) in architectural coatings. The organic amine neutralizer has stable pH value for regulating emulsion adhesive, and has moistening and dispersing effects. Can avoid using ammonia water, reduce the odor of the coating and the influence on constructors and environment, improve the scrubbing resistance and the water resistance, effectively reduce the odor of the coating and reduce Volatile Organic Compounds (VOC). Does not remain in the paint film for a long time, thereby endowing the paint with excellent water resistance.

Preferably, the odorless coalescing aid is eastman

YT series of ester alcohols are non-VOC coalescents. The boiling point is high (260 degrees), and the emulsion particles are softened, the dissolving power is strong, and then the emulsion particles are more effectively coalesced to provide conditions for mutual diffusion and permeation of the emulsion, so that a paint film achieves better compactness. The addition of the odorless coalescing aid in the formula disclosed by the invention is beneficial to the Mowilith DC 832 matte emulsion to show the properties of water resistance, weather resistance and the like.

Preferably, the surfactant is ECOSURFTM BD-109, is a new generation of high-performance special alcohol surfactant which does not contain APEO and is easy to biodegrade, has excellent wetting performance, can remarkably reduce the surface tension of water, uniformly disperses insoluble solid substances in liquid in the form of tiny particles, and increases the adhesion between the coating and a substrate.

Preferably, the thickener is a mixture of ACRYSOL AP-10 and RM 8W. Wherein, the mass ratio of ACRYSOL AP-10 and RM8W is preferably 1: 1. ACRYSOL AP-10 is a U.S. Rohm and Haas Allen alkali swelling emulsion type thickener, and has higher thickening efficiency than the products on the market, good water resistance and stable viscosity. Compared with a cellulose thickener, ACRYSOL AP-10 can improve the fluidity and the leveling property of the coating, limit flocculation and water separation by less coating volume, improve the durability and the like. RM8W is also available from Lomhas USA, and the type is a polyurethane rheology modifier, provides medium shear viscosity for coating, and has good balance of low and high shear viscosity, good leveling property and applicability, and excellent water resistance. The two types of thickeners are matched for use, and meanwhile, the properties of the coating, such as formula stability, water resistance, leveling property and the like, are improved.

The invention also discloses a preparation method of the high-transmittance dustproof anti-fouling matte finish paint, which comprises the following steps: sequentially putting part of water, the antifreezing agent, the surfactant and the defoaming agent into a production cylinder, and dispersing and stirring by using a dispersion machine; then adding acrylic emulsion, a smell-removing coalescence assistant and an organic amine neutralizer, and dispersing and stirring after adding; finally, adding the thickening agent, the preservative and the rest of water, and dispersing and stirring; sampling, cooling to 23 +/-1 ℃, measuring the viscosity, and if the viscosity is 60KU, canning and leaving factory;

wherein the content of part of water is 36.3-65% of the total water.

Compared with the prior art, the invention has the following beneficial effects:

the high-transmittance dustproof anti-fouling matte finish coat adopts the acrylic emulsion which is prepared by core-shell and self-crosslinking polymerization and has excellent water resistance

The ester alcohol film forming aid, the RHODOLINE AN-130 organic amine neutralizer, the ACRYSOL AP-10 and the RM8W thickener and the like are matched, so that the water resistance of the coating is enhanced, a wall substrate is well protected, the substrate is prevented from serious paint diseases such as water absorption floating, even peeling and the like, water is difficult to soak into a bottom layer from the coating and can not be adhered to the surface of a coating film, the coating film is a good barrier to stains, and the coating has good stain resistance; in order to meet the saturation of the wall surface base material and not influence the original appearance, no powdery component is added, so that the transparency of the coating is greatly improved.

Drawings

FIG. 1 is a schematic diagram showing the transparency of a sample in a use state according to example 1 of the present invention;

FIG. 2 is a schematic diagram showing the transparency of a comparative example 2of the present invention in a used state;

FIG. 3 is a schematic diagram showing the transparency of a comparative example 3 of the present invention in a used state.

Detailed Description

The present invention will be further described with reference to the following examples.

It should be noted that the raw materials used in the technical scheme provided by the present invention, except for the specific description, are prepared by conventional means or purchased through commercial channels.

Example 1

The high-transmittance dustproof anti-fouling matte finish paint comprises the following components in percentage by mass: 26.7% of water (wherein, the content of part of water added first is 20%, and the content of the rest of water added later is 6.7%); 0.5% of defoaming agent (mineral oil); acrylic emulsion (Mowilith DC 832 matte emulsion) 65%; 0.4% of cason preservative; 1.5 percent of antifreeze (propylene glycol); 0.4% of organic amine neutralizer (RHODOLINE AN-130); odorless coalescing aid (TEXANOL) 4%; 0.5% of surfactant (ECOSURFTM BD-109); 0.5% of thickener (RM 8W); 0.5% of thickener (CRYSOL AP-10).

Comparative example 1

The high-transmittance dustproof anti-fouling matte finish paint comprises the following components in percentage by mass: 26.7% of water (wherein, the content of part of water added first is 20%, and the content of the rest of water added later is 6.7%); 0.5% of defoaming agent (mineral oil); acrylic emulsion (Mowilith DC 832 matte emulsion) 65%; 0.4% of cason preservative; 1.5 percent of antifreeze (propylene glycol); 0.4% of organic amine neutralizer (RHODOLINE AN-130); odorless coalescing aid (TEXANOL) 4%; 0.5% of surfactant (ECOSURFTM BD-109); thickener (RM8W) 1%.

Comparative example 2

The high-transmittance dustproof anti-fouling matte finish paint comprises the following components in percentage by mass: 26.7% of water (wherein, the content of part of water added first is 20%, and the content of the rest of water added later is 6.7%); 0.5% of defoaming agent (mineral oil); acrylic emulsion (Mowilith DC 832 matte emulsion) 65%; 0.4% of cason preservative; 1.5 percent of antifreeze (propylene glycol); 0.4% of organic amine neutralizer (RHODOLINE AN-130); odorless coalescing aid (TEXANOL) 4%; 0.5% of surfactant (ECOSURFTM BD-109); 1% of thickener (CRYSOL AP-10).

The preparation method of the high-transmittance dustproof anti-fouling matte finishing paint in the embodiment 1 and the comparative examples 1-2 comprises the following steps: sequentially adding part of water (20%), an antifreezing agent, a surfactant and a defoaming agent into a production equipment cylinder, and dispersing for 5 minutes at the first rotating speed of 300 rpm; then sequentially adding the acrylic emulsion, the odor-removing coalescing aid and the organic amine neutralizer, and carrying out dispersion for 3 minutes at a second rotating speed of 300 rpm; then, the thickener, the remaining water (6.7%) and the preservative were added in this order, and the dispersion was carried out for 15 minutes at a third rotation speed of 600 prm. Sampling and cooling to 23 +/-1 ℃ to measure the viscosity, and if the viscosity is 60KU, canning and leaving factory.

Specifically, taking example 1 as an example, the preparation process of the high-transmittance dustproof anti-fouling matte finish paint is described as follows:

1. 20 parts by mass of water is put into a paint mixing tank, a stirrer is started, the rotating speed is increased to 300rpm, then 1.5 parts by mass of AN antifreezing agent (propylene glycol), 0.5 part by mass of a surfactant (ECOSURFTM BD-109) and 0.5 part by mass of AN antifoaming agent are gradually added into the water for dispersion for 5 minutes, and then 65 parts by mass of AN acrylic emulsion (Mowilith DC 832 matte emulsion), 4 parts by mass of a odorless coalescing aid (TEXANOL) and 0.4 part by mass of AN organic amine neutralizer (RHODINE AN-130) are added into the water for dispersion for 3 minutes at a time;

2. slowly adding 0.5 parts by mass of a thickener (RM8W) and 0.5 parts by mass of a thickener (CRYSOLAP-10) while stirring, adjusting the stirring speed to 550rpm, adding 6.7 parts by mass of water and 0.4 part by mass of a preservative, and continuing to disperse for 15 minutes; and (4) packaging after the viscosity is tested to be 60KU, thus obtaining the matte stain-resistant transparent finishing paint.

The samples prepared in example 1 and comparative examples 1-2 were examined as follows:

one, example 1 and comparative examples 1-2 were subjected to a thermal storage comparative state: the sample paint samples of example 1 and comparative examples 1-2 were placed in a thermostatic oven at 55 ℃. + -. 2 ℃ for 15 days after the condition of the paint sample state, viscosity, etc. was recorded, and the paint samples were taken out, observed for the open can state and cooled to 23 ℃. + -. 2 ℃. See the following table for details:

as shown in the table above, ACRYSOL AP-10 and RM8W in a mass ratio of 1:1 are selected as thickeners, and the two thickeners are matched to improve the properties of the coating, such as formula stability, water resistance, leveling property and the like.

Second, according to the industrial standard HG/T5065-:

item/name	Example 1	Market products 1	Market products 2
				viscosity/KU	60	73	55
Gloss (20 °/60 °)	0/8.8	0/13	0/9
				Water resistance (96h)	No abnormality	Has water inlet stain	No abnormality
Contamination resistance%	4.9	16	13
				Stain resistance (stain resistance score)	61	33	56
Water permeability/ml	0.3	1.7	0.8

As shown in the table above, the acrylic emulsion (Mowilith DC 832 matte emulsion) selected by the invention can be used for preparing the finish paint with low gloss, good water resistance, stain resistance and good stain resistance, and can better protect and display the effect on wall substrates. Fig. 1-3 are schematic diagrams showing the transparency of example 1, market product 1, and market product 2, respectively, in a use state (overlay contrast under the same patterned substrate), and by comparing fig. 1-3, it can be seen that market products 1 and 2 blurry the substrate font and are less sharp than example 1.

In order to make the decorative coating more durable, the damage of water penetrating through the coating and immersing into a substrate needs to be reduced, the water permeability of the finish paint disclosed by the invention needs to be tested in a targeted manner, the quality of the finish paint is further controlled, and the product performance is improved, through test comparison, the acrylic emulsion (Mowilith DC 832 matte emulsion) selected in the invention, example 1, has good protection effect on the substrate, and no water penetrates through the finish paint and immerses into the substrate; the water resistance is excellent, and the external light of the base material is influenced by whitening of the finish paint after the finish paint is not removed after the base material is soaked in water for 96 hours; in addition, the coating in example 1 has excellent stain resistance and stain resistance, and meets the requirements of internal and external indexes of HG/T5065-2016 finishing varnish for architectural coatings.

The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.

Claims

1. The high-transparency dustproof anti-fouling matte finish paint is characterized by comprising the following components in percentage by mass: 34.6 to 55 percent of water; 0.1 to 1 percent of defoaming agent; 35% -65% of acrylic emulsion; 0.1 to 0.4 percent of preservative; 0.5 to 15 percent of antifreeze; 0.2 to 0.5 percent of organic amine neutralizer; 0.5 to 5 percent of odorless coalescing aid; 0.1 to 1 percent of surfactant; 0.1 to 1 percent of thickening agent.

2. The high-transparency dustproof anti-fouling matte finish paint as claimed in claim 1, wherein the defoaming agent is mineral oil.

3. The high-transparency dustproof anti-fouling matte finish according to claim 1, wherein the acrylic emulsion is Mowilith DC 832 matte emulsion.

4. The high-transmittance dustproof anti-fouling matte finish paint as claimed in claim 1, wherein the preservative is a Kathon preservative.

5. The high-transparency dustproof anti-fouling matte finish according to claim 1, wherein the anti-freezing agent is propylene glycol.

6. The high transmittance, dustproof, anti-fouling matte finish according to claim 1, wherein the organic amine neutralizer is RHODOLINE AN-130.

7. The high-transparency dustproof anti-fouling matte finish paint as claimed in claim 1, wherein the odor-removing coalescing aid is Istmann

YT series of ester alcohols are non-VOC coalescents.

8. The high permeability dust and stain resistant matte finish of claim 1, wherein said surfactant is ECOSURFTM BD-109.

9. The high penetration dust and stain resistant matte finish according to claim 1, wherein said thickener is a mixture of ACRYSOL AP-10 and RM 8W.

10. The process for preparing a high-permeability dustproof antifouling matte finish according to any one of claims 1 to 9, which comprises the following steps: sequentially putting part of water, the antifreezing agent, the surfactant and the defoaming agent into a production cylinder, and dispersing and stirring by using a dispersion machine; then adding acrylic emulsion, a smell-removing coalescence assistant and an organic amine neutralizer, and dispersing and stirring after adding; finally, adding the thickening agent, the preservative and the rest of water, and dispersing and stirring; sampling, cooling to 23 +/-1 ℃, measuring the viscosity, and if the viscosity is 60KU, canning and leaving factory;

wherein the content of part of water is 36.3-65% of the total water.