CN115678400A - Special wear-resistant finish coat for inorganic floor coating and preparation method thereof - Google Patents

Special wear-resistant finish coat for inorganic floor coating and preparation method thereof Download PDF

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CN115678400A
CN115678400A CN202211267372.1A CN202211267372A CN115678400A CN 115678400 A CN115678400 A CN 115678400A CN 202211267372 A CN202211267372 A CN 202211267372A CN 115678400 A CN115678400 A CN 115678400A
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CN115678400B (en
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刘钦
王燕
熊俊
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Caparol China Co ltd
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Caparol China Co ltd
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Abstract

The invention belongs to the field of floor coatings, and particularly relates to a special wear-resistant finish coat for an inorganic floor coating and a preparation method thereof. The raw material composition of the special wear-resistant finish coat for the inorganic floor coating comprises a component A and a component B; the component A comprises: water, water-based inorganic silicon resin and hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion; the component B comprises: a sulfonate-modified water-dispersible HDI trimer and a second film-forming aid. The finish coat provided by the invention meets the performance requirements of national standard GB/T22374 terrace coating material on water-based finish coat.

Description

Special wear-resistant finish coat for inorganic floor coating and preparation method thereof
Technical Field
The invention belongs to the field of floor coatings, and particularly relates to a special wear-resistant finish coat for an inorganic floor coating and a preparation method thereof.
Background
The epoxy/polyurethane floor coating is widely applied to the ground at present, has a series of characteristics of good decoration, excellent wear resistance, super-strong adhesive force, good skid resistance and the like, is widely applied to the ground of garages, workshops, logistics warehouses, commercial complexes, cinemas, hotels, gyms and the like, and has high user acceptance. However, epoxy coatings/polyurethanes also have some disadvantages. For example, the first fire rating is class B1, and does not reach class a fire. Secondly, the epoxy floor/polyurethane coating is a bi-component, and the main paint and the curing agent can be constructed only after being uniformly stirred according to a certain proportion, so that the construction is complicated. Thirdly, the epoxy paint is easy to yellow after being dried in the sun, and is generally only used indoors. Although polyurethane can be used outdoors, the price of polyurethane is relatively expensive, so that the material cost is extremely high, and general users can not select polyurethane due to cost consideration.
The inorganic paint is prepared with silicate or silica sol and emulsion as base material, pigment, stuffing, water and assistant. Has the advantages of good air permeability, A-level fire resistance, weather resistance, environmental protection and the like. At present, corresponding products are sold in the interior and exterior wall coatings and are approved by users. In the field of floor coatings, inorganic floor coatings have been gradually released, which likewise use silicates or silica sols and emulsions as base materials. However, due to the characteristics of silicate, the film-forming property of silicate is slightly insufficient compared with epoxy or polyurethane, and especially in the aspects of wear resistance, surface strength and stain resistance, the silicate is not enough to completely meet the long-term use requirement of floor coatings. Therefore, the demand for finishing of inorganic floor coatings is demanded.
Disclosure of Invention
The invention aims to solve the problems, and provides the special wear-resistant finish coat paint for the inorganic floor paint, which has the advantages that a paint film is fireproof and flame-resistant, harmful substances such as free diisocyanate, free formaldehyde and the like are not detected, TVOC (total volatile organic compound) is less than or equal to 2, the paint film is good in appearance, high in tensile bonding strength, high in surface strength, good in wear resistance, certain in corrosion resistance and good in weather resistance, can effectively improve the wear resistance, surface hardness, chemical resistance and water resistance when being compounded on the surface of the inorganic floor paint, can be suitable for outdoor coating and the like, and can meet the requirements of national standard GB/T22374-2018 terrace coating materials on water-based finish paint, and the preparation method of the special wear-resistant finish coat paint for the inorganic floor paint. The production process is simple and is suitable for industrial production.
In order to achieve the above object, a first aspect of the present invention provides an inorganic wear-resistant finish coating for floor coating, which comprises a component a and a component B;
the component A comprises:
15-30 parts of water, 5-30 parts of water-based inorganic silicone resin, 50-80 parts of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion, 0-10 parts of first film forming auxiliary agent, 0-3 parts of thickening agent, 0-3 parts of defoaming agent, 0-2 parts of wetting agent and 0-2 parts of bactericide;
the component B comprises:
70-85 parts of sulfonate modified water dispersible HDI tripolymer and 15-30 parts of second film forming aid.
In the invention, the action principle of the special wear-resistant finish coat for the inorganic floor coating is as follows:
the main film-forming substance of the inorganic coating finish paint is silicate resin with a chemical formula of M 2 O·nSiO 2 . Wherein M represents K (potassium), na (sodium), li (lithium), or the like.
The main film forming of the water-based inorganic silicone resin is xSiO 2 The special wear-resistant finish paint for the inorganic floor coating can be firmly combined with the inorganic coating finish paint into a whole by being chemically cured with silicate resin which is a main film forming substance of the inorganic coating finish paint, and the reaction mechanism is as follows:
M 2 O·nSiO 2 +xSiO 2 →M 2 O·(n+x)SiO 2
M 2 O·(n+x)SiO 2 +CO 2 →(n+x)SiO 2 +M 2 CO 3
as a preferable scheme, in the special wear-resistant finish coat for the inorganic floor coating,
the component A comprises:
15-25 parts of water, 5-25 parts of water-based inorganic silicone resin, 50-75 parts of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion, 1-8 parts of first film forming auxiliary agent, 0.1-2 parts of thickening agent, 0.1-2 parts of defoaming agent, 0.1-1.5 parts of wetting agent and 0.1-1.5 parts of bactericide;
the component B comprises:
75-85 parts of sulfonate modified water dispersible HDI tripolymer and 15-25 parts of second film forming aid.
Preferably, the weight ratio of the component A to the component B is 4-5:1.
the water-based inorganic silicon resin is a high-stability inorganic silicon resin prepared by different purification, passivation and chemical grafting processes. The water-based inorganic silicone resin has the characteristics of temperature resistance, non-combustion, high hardness, brushing resistance, weather resistance, moisture permeability, water resistance, antibiosis, mildew resistance and the like. The water-based inorganic silicone resin can be compatible with water-based emulsion and water-soluble resin, is used for organic and inorganic hybrid coatings, improves the permeability and the film forming property of a film forming material to a substrate, and can be prepared into water-based inorganic modified organic composite coatings with high durability, high strength and low VOC. The water-based inorganic silicon resin has excellent film forming reactivity, can permeate into pores of the inorganic finish paint to generate silicification to form a stable mineral composite layer, effectively enhances the adhesive force between the inorganic finish paint and the wear-resistant cover surface, and further improves the overall paint film strength. Preferably, the aqueous inorganic silicone resin comprises water and silica, and the weight ratio of the water to the silica is 60-70:30-40. Preferably, the solid content of the water-based inorganic silicone resin is 25-35%, the specific gravity is 1.08-1.23g/mL, the pH =9-11, and the viscosity is 30-200cps. Specifically, the water-based inorganic silicone resin can be AS125 water-based silicone resin of Shanghai Wabeis New color materials, wherein the water-based inorganic silicone resin comprises water and silicon dioxide, and the weight ratio of the water to the silicon dioxide is 30:65, the solid content is more than 30%, the specific gravity is 1.08-1.25g/mL, the pH is =9-11, and the viscosity is 30-200cps.
Preferably, the hydroxyl content of the hydroxyl silicone oil modified multifunctional hydroxyl acrylic acid secondary dispersion is 3.3-5.0, the viscosity is 50-4000mPa.s, the density is 1.0-1.1g/mL, the gloss is more than 90, and the hardness is more than 2H. The hydroxyl silicone oil modified multifunctional group hydroxyl acrylic acid secondary dispersion can be selected from AS204 modified hydroxyl acrylic acid dispersion of Shanghai Waebis new material company, the hydroxyl content of the dispersion is 3.3, the viscosity is less than 600Pa.s, the density is 1.02-1.06g/mL, the highlight is more than 90, and the pencil hardness is more than 2H.
Preferably, the sulfonate modified water-dispersible HDI trimer has an NCO content of 18.8-22.5% and a viscosity of 500-3500mPa.s. The sulfonate modified water dispersible HDI trimer can be at least one of Aquolin 278, aquolin 269 and Aquolin270 of Wanhua chemical group GmbH, wherein the NCO content of the Aquolin 278 is 22.5%, and the viscosity is 1500-3500mPa.s.
Preferably, the thickener is at least one selected from the group consisting of methyl cellulose ether, hydroxyethyl cellulose ether and methyl hydroxyethyl cellulose ether. As a further preferred embodiment, the thickener is a hydroxyethyl cellulose ether, such as at least one selected from E230 FQ of Acksonobel, EBM 1000, QP-300H of Dow and R-9360 of Shanghai Waebis New materials Co.
Preferably, the bactericide is at least one selected from isothiazolinone derivatives, imidazole derivatives, and phenol derivatives. As a further preferable scheme, the bactericide is an isothiazolinone derivative, such as an SN 50905 aqueous inorganic coating bactericide, a Kathon LXE bactericide, a preventol bm5 bactericide, and the like, of the shanghai deep bamboo chemical technology ltd.
Preferably, the defoaming agent is at least one selected from the group consisting of mineral oil type defoaming agents, silicone type defoaming agents and non-silicon defoaming agents. As a further preferred embodiment, the defoamer is a mineral oil type defoamer, such as DAPRO DF 680, DAPRO DF 975 available from Elementis corporation.
Preferably, the wetting agent is selected from at least one of a modified silicone type wetting agent and an acrylic type wetting agent. As a further preferred option, the wetting agent may be selected from tego wet 270 and/or tego 280 from the winning company.
Preferably, the first film forming aid and the second film forming aid are each selected from at least one of propylene glycol diacetate, propylene glycol methyl ether acetate, dipropylene glycol monobutyl ether, dipropylene glycol methyl ether, dipropylene glycol butyl ether, and dipropylene glycol dimethyl ether and 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate. Such as Texanol from Istman, dowanol DPnb from Dow.
The second aspect of the present invention provides a preparation method of the above-mentioned wear-resistant finish coating special for inorganic floor coating, which comprises:
preparing a component A:
1) Optionally mixing the thickener with water;
2) Mixing and dispersing the substance obtained in the step 1) with water-based inorganic silicon resin, hydroxy silicone oil modified polyfunctional group hydroxy acrylic acid secondary dispersion, optional first film forming aid, optional defoamer, optional wetting agent and optional bactericide to obtain a component A;
preparing a component B:
and under the protection of inert gas, mixing and dispersing the sulfonate-modified water-dispersible HDI tripolymer and the second film-forming auxiliary agent to obtain a component B.
Preferably, in the step 1), the thickening agent is added into water stirred at the rotating speed of 200-400r/min, and after uniform stirring, the thickening agent is dispersed to be pasty at the rotating speed of 1000-2000r/min, and the dispersing time is 10-20min.
Preferably, in the step 2), the rotation speed of mixing and dispersing is 500-1000r/min, and the time of mixing and dispersing is 5-15min.
The invention has the beneficial effects that:
1. the main component of the finishing paint contains the incombustible water-based inorganic silicone resin, and the main component can pass the requirements of A2-grade (incombustible) building materials by detection according to the standard GB 8624-2012 'grading of combustion performance of building materials and products'.
2. The finishing paint disclosed by the invention is free from substances harmful to human bodies, such as Volatile Organic Compounds (VOC), free formaldehyde and the like, and is more environment-friendly. The free formaldehyde is less than or equal to 30mg/kg according to the detection of standard GB/T22374-2018 terrace coating material; the total amount of benzene, toluene, ethylbenzene and xylene is not detected, and the total amount of glycol ether, ether ester, free diisocyanate (TDI, HDI, limited polyurethane) and formaldehyde emission are not detected; TVOC is less than or equal to 2; VOC is less than or equal to 100g/L.
3. The finishing coat is applied to the surface of the inorganic floor coating, and can endow the inorganic floor coating with excellent wear resistance, surface hardness and chemical resistance.
4. The finish coat provided by the invention meets the performance requirements of national standard GB/T22374 terrace coating material on water-based finish coat.
5. The cover surface of the invention has good weather resistance, the artificial weather aging resistance is more than 800h, and the invention can be applied outdoors.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out according to conventional conditions or according to conditions recommended by the manufacturers. Unless otherwise indicated, percentages and parts are by weight. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.
In the examples and comparative examples of the present invention, the sources of the raw materials are:
and (2) component A:
thickening agent: EBM 1000 by Acksonobel;
aqueous inorganic silicone resin: AS125 waterborne silicone resin from Shanghai Waebeisi New color materials, inc.;
wetting agent: tego wet 270 of winning company;
defoaming agent: DAPRO DF 680 by Elementis;
and (3) bactericide: a preventol bm5 bactericide;
film-forming auxiliary agent: texanol from Istman;
hydroxyl silicone oil modified polyfunctional hydroxyl acrylic acid secondary dispersion: AS204 modified hydroxyacrylic acid dispersions from Shanghai Waebeis New color materials, inc.
And the component B comprises:
film-forming auxiliary agent: texanol from Isyman;
sulfonate-modified water dispersible HDI trimers: aquolin 278, wawa chemical;
example 1
Adding 1.2 parts by weight of thickening agent into 20 parts by weight of water stirred at 300r/min, uniformly stirring, and dispersing at a high speed of 2000r/min to be pasty, wherein the stirring time is 20min; then mixing and dispersing 20 parts by weight of water-based inorganic silicon resin, 1 part by weight of wetting agent, 0.7 part by weight of defoaming agent, 0.5 part by weight of bactericide, 4 parts by weight of film-forming aid and 75 parts by weight of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion at 1000r/min, and stirring for 10min; and after the dispersion is finished, obtaining the component A of the special wear-resistant finish coat for the inorganic floor coating. Under the protection of nitrogen, 15 parts by weight of film-forming assistant is added into 85 parts by weight of sulfonate-modified water-dispersible HDI tripolymer to obtain the component B of the special wear-resistant finish coat for the inorganic floor coating. And (3) mixing the component A and the component B according to a ratio of 4.5, and constructing to obtain the special wear-resistant finish paint for the inorganic floor coating.
The performance of the water-based finish paint is tested according to the national standard GB/T22374 terrace coating materials.
Example 2
Adding 1.2 parts by weight of thickening agent into 15 parts by weight of water stirred at 300r/min, uniformly stirring, and dispersing at a high speed of 2000r/min to be pasty, wherein the stirring time is 20min; then mixing and dispersing 10 parts by weight of aqueous inorganic silicone resin, 0.8 part by weight of wetting agent, 0.7 part by weight of defoaming agent, 0.5 part by weight of bactericide, 4 parts by weight of film-forming aid and 75 parts by weight of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion at 1000r/min, and stirring for 10min; and after the dispersion is finished, obtaining the component A of the special wear-resistant finish coat for the inorganic floor coating. Under the protection of nitrogen, 15 parts by weight of film-forming assistant is added into 85 parts by weight of sulfonate-modified water-dispersible HDI tripolymer to obtain the component B of the special wear-resistant finish coat for the inorganic floor coating. And (3) mixing the component A and the component B according to a ratio of 4.5.
The performance of the water-based finish paint is tested according to the national standard GB/T22374 terrace coating material.
Example 3
Adding 1.2 parts by weight of thickening agent into 15 parts by weight of water stirred at 300r/min, uniformly stirring, and dispersing at a high speed of 2000r/min to be pasty, wherein the stirring time is 20min; then mixing and dispersing 20 parts by weight of water-based inorganic silicone resin, 1 part by weight of wetting agent, 0.7 part by weight of defoaming agent, 0.5 part by weight of bactericide, 4 parts by weight of film-forming assistant and 60 parts by weight of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion at the speed of 1000r/min, and stirring for 10min; and after the dispersion is finished, obtaining the component A of the special wear-resistant finish coat for the inorganic floor coating. And under the condition of nitrogen protection, adding 20 parts by weight of film-forming assistant into 80 parts by weight of sulfonate-modified water-dispersible HDI trimer to obtain the component B of the special wear-resistant finishing paint for the inorganic floor coating. And (3) mixing the component A and the component B according to a ratio of 4.5, and constructing to obtain the special wear-resistant finish paint for the inorganic floor coating.
The performance of the water-based finish paint is tested according to the national standard GB/T22374 terrace coating materials.
Comparative example 1 the inorganic Silicone resin is outside the given range
Adding 1.2 parts by weight of thickening agent into 20 parts by weight of water stirred at 300r/min, uniformly stirring, and dispersing at a high speed of 2000r/min to be pasty, wherein the stirring time is 20min; then mixing and dispersing 40 parts by weight of aqueous inorganic silicone resin, 1.2 parts by weight of wetting agent, 0.7 part by weight of defoaming agent, 0.5 part by weight of bactericide, 5 parts by weight of film-forming aid and 60 parts by weight of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion at 1000r/min, and stirring for 10min; and after the dispersion is finished, obtaining the component A of the special wear-resistant finish coat for the inorganic floor coating. Under the condition of nitrogen protection, 20 parts by weight of film-forming assistant is added into 80 parts by weight of sulfonate-modified water-dispersible HDI tripolymer to obtain the component B of the special wear-resistant finish coat for the inorganic floor coating. And (3) mixing the component A and the component B according to a ratio of 4.5.
Comparative example 2 No inorganic resin
Adding 1.2 parts by weight of thickening agent into 300r/min stirred water, uniformly stirring, and dispersing at a high speed of 2000r/min to paste for 20min; then 0.7 part by weight of wetting agent, 0.7 part by weight of defoaming agent, 0.5 part by weight of bactericide, 3 parts by weight of film-forming assistant and 60 parts by weight of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion are mixed and dispersed at 1000r/min, and the stirring time is 10min; and after the dispersion is finished, obtaining the component A of the special wear-resistant finish coat for the inorganic floor coating. And under the condition of nitrogen protection, adding 20 parts by weight of film-forming assistant into 80 parts by weight of sulfonate-modified water-dispersible HDI trimer to obtain the component B of the special wear-resistant finishing paint for the inorganic floor coating. And (3) mixing the component A and the component B according to a ratio of 4.5, and constructing to obtain the special wear-resistant finish paint for the inorganic floor coating.
Comparative example 3
The only difference from example 2 was that 30 parts by weight of a multifunctional hydroxyacrylic acid secondary dispersion modified with a hydroxysilicone oil was used.
Adding 1.2 parts by weight of thickening agent into 15 parts by weight of water stirred at 300r/min, uniformly stirring, and dispersing at a high speed of 2000r/min to be pasty, wherein the stirring time is 20min; then 10 parts by weight of aqueous inorganic silicone resin, 0.8 part by weight of wetting agent, 0.7 part by weight of defoaming agent, 0.5 part by weight of bactericide, 4 parts by weight of film-forming aid and 30 parts by weight of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion are mixed and dispersed at the speed of 1000r/min, and the stirring time is 10min; and after the dispersion is finished, obtaining the component A of the special wear-resistant finish coat for the inorganic floor coating. Under the condition of nitrogen protection, 15 parts by weight of film-forming assistant is added into 85 parts by weight of sulfonate-modified water dispersible HDI tripolymer to obtain the component B of the special wear-resistant finishing paint for the inorganic floor coating. And (3) mixing the component A and the component B according to a ratio of 4.5, and constructing to obtain the special wear-resistant finish paint for the inorganic floor coating.
The performance of the water-based finish paint is tested according to the national standard GB/T22374 terrace coating materials.
Comparative example 4
Except for using 150 parts by weight of the multifunctional hydroxyacrylic acid secondary dispersion modified with the hydroxysilicone oil from example 3.
Adding 1.2 parts by weight of thickening agent into 15 parts by weight of water stirred at 300r/min, uniformly stirring, and dispersing at a high speed of 2000r/min to be pasty, wherein the stirring time is 20min; then mixing and dispersing 20 parts by weight of water-based inorganic silicon resin, 1 part by weight of wetting agent, 0.7 part by weight of defoaming agent, 0.5 part by weight of bactericide, 4 parts by weight of film-forming aid and 150 parts by weight of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion at 1000r/min, and stirring for 10min; and after the dispersion is finished, obtaining the component A of the special wear-resistant finish coat for the inorganic floor coating. And under the condition of nitrogen protection, adding 20 parts by weight of film-forming assistant into 80 parts by weight of sulfonate-modified water-dispersible HDI trimer to obtain the component B of the special wear-resistant finishing paint for the inorganic floor coating. And (3) mixing the component A and the component B according to a ratio of 4.5.
The performance of the water-based finish paint is tested according to the national standard GB/T22374 terrace coating material.
TABLE 1 comparison of the properties of the examples and comparative examples
Figure BDA0003893947630000101
Figure BDA0003893947630000111
As can be seen from Table 1, the indexes of comparative examples 1-3 meet the requirements of the water-based finish paint in the national standard GB/T22374 terrace coating Material, particularly, the tensile bonding strength of example 1 is as high as 3.6MPa, which is far beyond the standard requirement, the tensile bonding strength is still kept at 2.9MPa after immersion, and the water-based primer has excellent tensile bonding performance. Secondly, in the aspect of drying speed, the drying speed of surface drying for about 60 minutes and drying for 8 hours is matched with the drying speed of surface drying for 20 minutes and drying for 4 hours in an inorganic system, so that the construction period is greatly shortened. Thirdly, in the aspect of chemical resistance, the inorganic finish surface has good alkali resistance, and a paint film is complete, does not bubble, does not peel off and does not change color after being tested by alkali resistance, water resistance, oil resistance, acid resistance and solvent oil resistance, thereby meeting the requirements of finish paint. Fourthly, in the aspect of the limited quantity of harmful substances, the free formaldehyde is less than or equal to 30mg/kg; the total amount of benzene, toluene, ethylbenzene and xylene is not detected, and the total amount of glycol ether, ether ester, free diisocyanate (TDI, HDI, limited polyurethane) and formaldehyde emission are not detected; TVOC is less than or equal to 2; VOC is less than or equal to 100g/L. Fifthly, the inorganic finish paint can pass the requirements of A2-grade (non-combustible) building materials by detecting according to the standard GB 8624-2012 'grading of combustion performance of building materials and products'. In other properties, the inorganic finish coat has good weather resistance, artificial weathering resistance for 800h, and good impact resistance and skid resistance.
On the other hand, in order to further exhibit the advantages of the present invention, commercially available inorganic top coats are selected as substrates after painting.
TABLE 2 comparison of the properties of the examples and comparative examples
Figure BDA0003893947630000121
Figure BDA0003893947630000131
As can be seen from Table 2, for the inorganic finish paint, the film formation of the paint film is normal, the surface is smooth, and the phenomena of shrinkage cavity, floating color, flowering, wrinkling, pin holes and cracking are avoided, but the wear resistance is more than 0.05g, and the paint film is not qualified. Similarly, the pencil hardness of the surface is HB, and although the national standard does not require pencil hardness, in general practical use, the pencil hardness needs to be greater than H to meet the use requirement of the ground coating. In terms of impact resistance, the inorganic topcoat cannot withstand the impact of a 1kg steel ball, that is, cannot withstand a heavy load. And the antiskid property is more than 0.5, and the antiskid requirement is just met. On the other hand, the paint film is slightly discolored in water resistance, alkali resistance and oil resistance, and is unqualified in acid resistance because the paint film system is alkaline in nature. The combustion performance rating satisfies a level A2.
The inorganic finish paint is respectively coated with the inorganic finish paint of the embodiment 1, the comparative example 1 and the comparative example 2, and as can be seen from the table 2, after the inorganic finish paint is coated with the inorganic finish paint of the embodiment 1, the surface of a paint film is flat and has no phenomena of shrinkage cavity, floating color, floating, wrinkling, pinholes and cracking; the wear resistance is 0.028g, and meets the standard requirement; in the aspect of pencil hardness, the hardness is improved from B to 2H, so that the use requirement of the ground coating can be met; in the aspect of impact resistance, a paint film can bear the impact of a steel ball of 1kg, namely can bear heavy load; in the aspect of skid resistance, the dry friction coefficient is 0.61, so that the skid resistance requirement is met; the improvement is more obvious in the aspects of water resistance, alkali resistance and oil resistance, the paint film is not foamed, peeled and discolored, the acid resistance is improved from unqualified to qualified, and the paint film is not foamed, peeled and discolored. The combustion performance rating satisfies a level A2.
From comparative example 1 and comparative example 2, the paint film of comparative example 1 has a flat surface, no shrinkage cavity, floating color, hair, wrinkle, pinhole and slight cracking; and comparative example 2 has a flat surface and no shrinkage cavity, floating color, blooming, wrinkling, pinholes or cracking. The wear resistance of the two is qualified, and the standard requirements are met; in pencil hardness, comparative example 1 was upgraded from HB to B, while comparative example 2 was upgraded from HB to H; in terms of impact resistance, comparative example 1 had slight cracks, while comparative example 2 did not; in the aspect of skid resistance, the requirement of skid resistance is met; while comparative example 1 had slight discoloration while comparative example 2 had no discoloration in terms of water resistance, alkali resistance, oil resistance, and acid resistance; in terms of combustion performance, comparative example 1 can satisfy the A2 grade, while comparative example 1 can satisfy only the B1 grade. In conclusion, the special wear-resistant finish coat for the inorganic floor coating, prepared by the invention, has the advantages that the paint film is fireproof and flame-retardant (A2 level), and the wear resistance, the surface hardness, the chemical resistance, the water resistance and the like can be effectively improved by compounding the special wear-resistant finish coat on the surface of the inorganic floor coating. Comparative examples 3 and 4, the use of the multifunctional hydroxyacrylic acid secondary dispersion modified with improper hydroxysilicone oil and the sulfonate-modified water-dispersible HDI trimer caused problems in various properties in comparative examples 3 and 4, and the effects in acid resistance, alkali resistance, oil resistance pencil hardness, and the like were rather reduced.
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. The special wear-resistant finish coat for the inorganic floor coating is characterized by comprising a component A and a component B;
the component A comprises:
15-30 parts of water, 5-30 parts of water-based inorganic silicone resin, 50-80 parts of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion, 0-10 parts of first film forming auxiliary agent, 0-3 parts of thickening agent, 0-3 parts of defoaming agent, 0-2 parts of wetting agent and 0-2 parts of bactericide;
the component B comprises:
70-85 parts of sulfonate modified water dispersible HDI tripolymer and 15-30 parts of second film forming aid.
2. The inorganic wear finish for floor coatings according to claim 1, wherein,
the component A comprises:
15-25 parts of water, 5-25 parts of water-based inorganic silicon resin, 50-75 parts of hydroxyl silicone oil modified polyfunctional group hydroxyl acrylic acid secondary dispersion, 1-8 parts of first film forming auxiliary agent, 0.1-2 parts of thickening agent, 0.1-2 parts of defoaming agent, 0.1-1.5 parts of wetting agent and 0.1-1.5 parts of bactericide;
the component B comprises:
75-85 parts of sulfonate modified water dispersible HDI tripolymer and 15-25 parts of second film forming auxiliary agent.
3. The inorganic wear-resistant finish coat for floor coatings according to claim 1 or 2, wherein,
the weight ratio of the component A to the component B is 4-5:1.
4. the inorganic wear finish for floor coating according to claim 1 or 2, wherein,
the water-based inorganic silicone resin comprises water and silica, and the weight ratio of the water to the silica is 60-70:30-40.
5. The inorganic wear-resistant finish coat for floor coatings according to claim 1 or 2, wherein the solid content of the aqueous inorganic silicone resin is 25-35%, the specific gravity is 1.08-1.23g/mL, the pH =9-11, and the viscosity is 30-200cps.
6. The inorganic wear finish for floor coating according to claim 1 or 2, wherein,
the hydroxyl content of the hydroxyl silicone oil modified multifunctional hydroxyl acrylic acid secondary dispersion is 3.3-5.0, the viscosity is 50-4000mPa.s, the density is 1.0-1.1g/mL, the highlight is more than 90, and the pencil hardness is more than 2H.
7. The inorganic wear finish for floor coating according to claim 1 or 2, wherein,
the sulfonate-modified water-dispersible HDI trimer has an NCO content of 18.8-22.5% and a viscosity of 500-3500mPa.s.
8. The inorganic wear finish for floor coating according to claim 1 or 2, wherein,
the thickening agent is selected from at least one of methyl cellulose ether, hydroxyethyl cellulose ether and methyl hydroxyethyl cellulose ether;
the bactericide is at least one of isothiazolinone derivatives, imidazole derivatives and phenol derivatives;
the defoaming agent is at least one of mineral oil defoaming agent, organic silicon defoaming agent and non-silicon defoaming agent;
the wetting agent is selected from at least one of a modified organic silicon type wetting agent and an acrylic acid type wetting agent;
the first film forming aid and the second film forming aid are each selected from at least one of propylene glycol diacetate, propylene glycol methyl ether acetate, dipropylene glycol monobutyl ether, dipropylene glycol methyl ether, dipropylene glycol butyl ether, dipropylene glycol dimethyl ether, and 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate.
9. The preparation method of the special wear-resistant finishing paint for inorganic floor coatings of any one of claims 1 to 8 is characterized by comprising the following steps:
preparing a component A:
1) Optionally mixing the thickener with water;
2) Mixing and dispersing the substance obtained in the step 1) with water-based inorganic silicon resin, hydroxy silicone oil modified polyfunctional group hydroxy acrylic acid secondary dispersion, optional first film forming aid, optional defoamer, optional wetting agent and optional bactericide to obtain a component A;
preparing a component B:
and under the protection of inert gas, mixing and dispersing the sulfonate-modified water-dispersible HDI tripolymer and the second film-forming auxiliary agent to obtain a component B.
10. The method for preparing the wear-resistant finish coat for inorganic floor coating according to claim 9, wherein,
in the step 1), adding the thickening agent into water stirred at the rotating speed of 200-400r/min, uniformly stirring, and dispersing at the rotating speed of 1000-2000r/min to be pasty for 10-20min;
in the step 2), the rotating speed of mixing and dispersing is 500-1000r/min, and the time of mixing and dispersing is 5-15min.
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CN111607260A (en) * 2020-06-29 2020-09-01 中国建筑材料科学研究总院有限公司 Organic-inorganic composite interior wall coating and preparation method thereof
CN112759967A (en) * 2021-02-09 2021-05-07 沈阳市金海韵涂料有限公司 Inorganic paint for water-based mineral interior wall and preparation method thereof
CN113462213A (en) * 2021-07-14 2021-10-01 青岛海洋新材料科技有限公司 zero-VOCs high-hardness waterborne polyurethane floor finish and preparation method thereof
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CN111607260A (en) * 2020-06-29 2020-09-01 中国建筑材料科学研究总院有限公司 Organic-inorganic composite interior wall coating and preparation method thereof
CN112759967A (en) * 2021-02-09 2021-05-07 沈阳市金海韵涂料有限公司 Inorganic paint for water-based mineral interior wall and preparation method thereof
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