Waterborne inorganic anti-doodling ceramic paint for indoor walls and preparation method therefor

Abstract

The present disclosure discloses a waterborne inorganic anti-doodling ceramic paint for indoor walls and preparation method thereof; the ceramic paint is a dual-coating paint having an under-coating paint and a surface-coating paint. The advantage effects of the present disclosure is that: the main film-forming materials are inorganic materials, the solvent is mostly deionized water, VOC emission is extremely low, thereby having a characteristics of safety, health and environmental protection; overcoming the shortcomings of multi-components of ceramic paint needs to be aged before use, while the under-coating paint and the surface-coating paint of the present disclosure are all single-component and can be directly used, easily to apply and fast; having an anti-doodling effect, when a marker doodling on the walls, it can be easily erased; the coating has a low surface tension which can isolate the outdoor moisture and prevent the walls from getting wet and mildewed.

Claims

1. A waterborne inorganic anti-doodling ceramic paint for indoor walls, wherein the ceramic paint is a dual-coating paint, comprising an under-coating paint and a surface-coating paint, wherein the under-coating paint comprises the following components in percentage by weight: 35-45% of a silane-modified silica sol; 15-20% of a solvent; 0.5-0.6% of a dispersant; 9-20% of a filler; 15-30% of a pigment; 8-15% of a waterborne epoxy resin; and 0.5-1% of a flatting agent; wherein the surface-coating paint comprises the following components in percentage by weight: 18-25% of a silane; 65-80% of a solvent; 0.5-1% of a flatting agent; 0.2-0.3% of a catalyst; 0-15% of a pigment, and 0-0.5% of a dispersant, and wherein the silane is a mixture of methyltrimethoxysilane, tetraethyl orthosilicate, and epoxy silane in a weight ratio of (4-4):(4-4):(1-3).

2. The waterborne inorganic anti-doodling ceramic paint for indoor walls according to claim 1, wherein in the under-coating paint and the surface-coating paint, the solvent is one or more selected from deionized water, isopropanol, ethyl alcohol and n-butyl alcohol; the pigment is an inorganic pigment; and the flatting agent is one or both of methyl silicone oil and hydroxyl silicone oil.

3. The waterborne inorganic anti-doodling ceramic paint for indoor walls according to claim 1, wherein in the under-coating paint, the filler is one or more selected from mica powder, kaolin, fumed silica, barium sulfate, whisker silicon, hydroxymethyl cellulose, hydroxyethyl cellulose and bentonite.

4. The waterborne inorganic anti-doodling ceramic paint for indoor walls according to claim 1, wherein in the surface-coating paint, the catalyst is one or more selected from formic acid, acetic acid and hydrochloric acid.

5. A method for preparing a waterborne inorganic anti-doodling ceramic paint for indoor walls, wherein the ceramic paint is a dual-coating paint, comprising an under-coating paint and a surface-coating paint; wherein the under-coating paint comprises the following components in percentage by weight: 35-45% of a silane-modified silica sol; 15-20% of a solvent; 0.5-0.6% of a dispersant; 9-20% of a filler; 15-30% of a pigment; 8-15% of a waterborne epoxy resin; and 0.5-1% of a flatting agent; wherein the surface-coating paint comprises the following components in percentage by weight: 18-25% of a silane; 65-80% of a solvent; 0.5-1% of a flatting agent; 0.2-0.3% of a catalyst; 0-15% of a pigment; and 0-0.5% of a dispersant, wherein the silane is a mixture of methyltrimethoxysilane, tetraethyl orthosilicate, and epoxy silane in a weight ratio of (4-4):(4-4):(1-3), wherein the method comprises a preparation of the under-coating paint and a preparation of the surface-coating paint; wherein the preparation of the under-coating paint comprises steps of: preparing raw materials based on components of the under-coating paint and their weight percentage; mixing the silane-modified silica sol, solvent, dispersant, pigment and filler, grinding to obtain a color paste; adding a mixture of waterborne epoxy resin and flatting agent to the color paste; and continuously grinding and filtering to obtain the under-coating paint; wherein the preparation of the surface-coating paint comprises steps of: preparing raw materials based on components of the surface-coating paint and their weight percentage; mixing the silane, part of solvent, catalyst and flatting agent, and aging a resulting mixture to obtain a mixture A; mixing a pigment, dispersant and another part of solvent, and grinding a resulting mixture to obtain a mixture B; and mixing the mixture A with the mixture B, and filtering to obtain the surface-coating paint.

6. The method for preparing the paint according to claim 5, wherein in the preparation steps of the under-coating paint, the color paste has a fineness ≤20 μm; and the filtering is specifically filtered by using a 200-400 mesh filter cloth.

7. The method for preparing the paint according to claim 5, wherein in the preparation of the surface-coating paint, the aging is specifically treated by mixing the silane, part of solvent, and catalyst, and placing a resulting mixture at 20-30° C., 100-200 rpm for 12-20 hours.

8. The method for preparing the paint according to claim 5, wherein in the preparation of the surface-coating paint, the mixture B has a fineness ≤20 μm; and the filtering is specifically filtered by using a 200-400 mesh filter cloth.

9. The method for preparing the paint according to claim 5, wherein in the preparation of the surface-coating paint, the mixture A and the mixture B are mixed at a weight ratio of (3-20):1.

10. The method for preparing the paint according to claim 5, wherein in the under-coating paint and the surface-coating paint, the solvent is one or more selected from deionized water, isopropanol, ethyl alcohol and n-butyl alcohol; the pigment is an inorganic pigment; and the flatting agent is one or both of methyl silicone oil and hydroxyl silicone oil.

11. The method for preparing the paint according to claim 5, wherein in the under-coating paint, the filler is one or more selected from mica powder, kaolin, fumed silica, barium sulfate, whisker silicon, hydroxymethyl cellulose, hydroxyethyl cellulose and bentonite.

12. The method for preparing the paint according to claim 5, wherein in the surface-coating paint, the catalyst is one or more selected from formic acid, acetic acid and hydrochloric acid.

Description

DETAILED DESCRIPTION

(1) The present disclosure will be described in detail with reference to specific examples. The following examples will help those skilled in the art to further understand the present disclosure but not limit the present disclosure in any form. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the inventive concept of the present disclosure. These all belong to the protection scope of the present disclosure.

(2) In the examples of the present disclosure, the silane-modified silica sol is a main film-forming material, a weight content thereof is limited to 35-45% because if the amount is too much, which will cause the hardness too high and crack on the cement; if the amount is too small, which will cause the pigment base ratio too high off powder; the silane-modified silica sol such as Bindzil CC151, Bindzil CC301 and the like.

(3) In the examples of the present disclosure, a weight content of the dispersant is limited to 0.5-0.6% because if the amount thereof is too small, which will cause the pigment is not well dispersed and the viscosity is large; if the amount is too much, the paint has poor scratch resistance and easy to fall off.

(4) In the examples of the present disclosure, the waterborne epoxy resin is an organic auxiliary film-forming material, and a weight content of the waterborne epoxy resin is limited to 8-15%, because if the amount thereof is too much which will cause no fireproof performance, and if the amount thereof is too small which will cause a poor waterproofness.

(5) In the examples of the present disclosure, the solvent water is deionized water.

(6) In the examples of the present disclosure, the waterborne epoxy resin comprises EP-51, HyPer WE1044, GF-208.

Examples 1-3

(7) Examples 1-3 respectively provide a waterborne inorganic anti-doodling ceramic paint for indoor walls, and the specific components thereof are shown in table

(8) TABLE-US-00001 TABLE 1 Type and content Example 1 Example 2 Example 3 of raw material content type content type content type under- silane-modified silica sol   36% Bindzil CC151  35% Bindzil CC151   40% Bindzil CC301 coating solvent   18% deionized water  20% isopropanol   15% ethyl alcohol paint dispersant  0.5% BYK190 0.5% BYK180  0.5% BYK2010 filler   9% mica powder  16% barium sulfate 20.5% kaolin pigment 26.5% titanium dioxide  16% ferromanganese black   15% iron oxide red waterborne epoxy resin   9% EP-51  12% HyPer WE1044   8% GF-208 flatting agent   1% methyl 0.5% methyl   1% hydroxyl silicone oil silicone oil silicone oil surface- silane   18% 2:2:1  22% 4:4:1   18% 4:4:3 coating solvent 68.6% deionized water  75% ethyl alcohol   80% isopropanol paint flatting agent   1% methyl 0.5% methyl  0.5% methyl silicone oil silicone oil   silicone oil catalyst  0.2% formic acid 0.3% acetic acid  0.5% hydrochloric acid pigment   12% titanium dioxide   2% ferromanganese black  0.5% iron oxide red dispersant  0.2% BYK190 0.2% BYK180  0.5% BYK2010 A ration of silane in example 1, example 2, example 3 specifically is: a weight ratio of methyltrimethoxy silane, tetraethyl orthosilicate, and 3-(glycidoxypropyl)trimethoxysilane.

(9) The preparation method of paint provided in the above-mentioned example 1, example 2, example 3 are the same, includes preparation of a under-coating paint and preparation of a surface-coating paint.

(10) (1) the preparation of the under-coating paint includes steps of: preparing raw materials based on the components as shown in table 1 and their weight percentage; mixing the silane-modified silica sol, solvent, dispersant, pigment and filler, grinding to obtain a color paste; in the step, the color paste has a fineness ≤20 μm, the fineness is specifically controlled by grinding, and a grinding time can be control in 1-2 hours; adding a mixture of waterborne epoxy resin, flatting agent to the color paste, after a continuously grinding, filtering to obtain the under-coating paint; in the step, a time of the continuously grinding can be controlled in 5-15 minutes, and the filtering is specifically filtered by using a 200 mesh filter cloth.

(11) In the above steps, an equipment of the grinding is specifically a sand mill.

(12) (2) the preparation of the surface-coating paint includes steps of: preparing raw materials based on the components of the surface-coating paint as shown in above table 1 and their weight percentage; mixing a silane, deionized water, catalyst and flatting agent, aging a resulting mixture to obtain a mixture A; in the step, the aging is specifically treated by mixing a silane, deionized water and catalyst, and placing a resulting mixture at 25° C., 100 rpm for 20 hours; mixing a pigment, dispersant and deionized water, grinding a resulting mixture to obtain a mixture B; in the step, the mixture B has a fineness ≤20 μm, which is specifically achieved by a grinding treatment for 1-2 hours; mixing the mixture A with the mixture B at a weight ratio of 10:1, filtering to obtain the surface-coating paint; in the step, the filtering is specifically filtered by using a 200 mesh filter cloth.

(13) It should be noted that, the above preparation method can realize the preparation of the under-coating paint and the surface-coating paint under the following conditions:

(14) the filtering is carried out by using a 200-400 mesh filter cloth, an aging condition is aging at 20-30° C., 100-200 rpm for 12-20 hours, the mixture A and the mixture B are mixed at a weight ratio of (3-20):1.

(15) The inventors test the performance of the paints prepared in example 1, 2 and 3, the results show that, three formulated paint products have better effects in crack resistance, non-burning and smokeless, anti-doodling performance, water resistance, etc., and meanwhile, compared with other two examples, example 1 is more effective in terms of crack resistance and cost control, indicating that there are relatively preferred examples within the scope of the present disclosure. The inventors further verified that the following paint formulations have better performances:

(16) The under-coating paint includes components in percentage by weight as follows: 36% of silane-modified silica sol, 18% of solvent, 0.5% of dispersant, 9% of filler, 26.5% of pigment, 9% of waterborne epoxy resin, and 1% of flatting agent.

(17) The surface-coating paint includes components in percentage by weight as follows: 18% of silane, 68.6% of solvent, 1% of flatting agent, 0.2% of catalyst, 12% of pigment, and 0.2% of dispersant.

(18) In order to embody the significant advantages of the limited products of the present disclosure, in the process of the examples of the present disclosure, the inventors also provide comparative examples, specifically as follows:

(19) Comparative example 1: the difference from example 1 is only in that, in the under-coating paint, silane-modified silica sol has a content of 28%, waterborne epoxy resin has a content of 17%.

(20) Comparative example 2: the difference from example 1 is only in that, in the surface-coating paint, silane has a content of 15%, flatting agent has a content of 4%.

(21) Comparative 3: the difference from example 1 is only in that, in the surface-coating paint, 18% of methyltrimethoxysilane, tetraethyl orthosilicate, 3-(glycidoxypropyl)trimethoxysilane have a weight ratio of 1:1:1.

(22) Comparative example 4: the difference from example 1 is only in that, in the under-coating paint, silane-modified silica sol has a content of 28%, waterborne epoxy resin has a content of 17%; in the surface-coating paint, silane has a content of 15%, flatting agent has a content of 4%.

(23) Comparative example 5: the difference from example 1 is only in that, in the surface-coating paint, silance has a content of 15%, flatting agent has content of 4%; 18% of methyltrimethoxysilane, tetraethyl orthosilicate, 3-(glycidoxypropyl) trimethoxysilane have a weight ratio of 1:1:1.

(24) Comparative example 6: the difference from example 1 is only in that, in the preparation of the surface-coating paint, the mixture A and the mixture B are mixed at a weight ratio of 2:1, and an aging condition is aging at 250 rpm for 10 hours.

(25) Comparative example 7: the difference from example 1 is only in that, in the preparation of the surface-coating paint, the mixture A and the mixture B are mixed at a weight ratio of 2:1, and an aging condition is aging at 250 rpm for 10 hours; silane has a content of 15%, and flatting agent has a content of 4%.

(26) The inventors test the performances of example 1 and comparative examples 1-7, the test methods include: the non-burning and smokeless performance is tested by using a flame gun, the anti-doodling performance is tested by using tissue to erase after being written by a marker; the test results are shown in table 2.

(27) TABLE-US-00002 TABLE 2 Comparative examples Performance Example 1 1 2 3 4 5 6 7 non-burning flame with flame with flame with flame with flame with flame with flame with flame with and smokeless non-burning smoke non-burning non-burning and smoke non-burning non-burning non-burning and smokeless and smokeless smokeless and smokeless and smokeless and smokeless anti-doodling marker with marker with marker with not marker with marker with not marker with marker with marker with easily erased easily erased easy being easily erased easy being easily erased cannot be cannot be erased erased erased erased appearance smooth coating surface-coating surface-coating coating surface-coating shrikage surface-coating and flat cracking cracking cracking cracking cracking cracking paint quality 3 months 1 month 3 months 3 months 3 months 3 months 3 months 3 months guarantee priod

(28) In conclusion, the present disclosure solves the following technical problems:

(29) (1) Traditional inorganic ceramic paint is a double-component or three-component paint, before being used, several components need to be mixed and aged for a period of time to be used, after aged, the ceramic paint needs to be used up within 48-72 hours, the use method is relatively complicated; while the paint of the present disclosure is a single-component paint and can be directly applied;

(30) (2) the film-forming material of the existing latex paint is an organic material, which is harmful to environment and human body, and is not good for health. The present disclosure relates to an indoor walls paint which is a ceramic paint, and the film-forming material thereof is an inorganic silica sol (i.e., an aqueous solution of silicon dioxide), which has a characteristics of healthy, safe and environmental protection;

(31) (3) The anti-doodling effect of the present disclosure is not achieved by adding a fluoropolymer which is not beneficial to health, but is achieved by —CH.sub.3 formed by hydrolysis polymerization of a plurality of silane.

(32) The specific examples of the present disclosure are described above. It should be understood that, the present disclosure is not limited to the specific examples described above, various variants or modifications may be made by those skilled in the art within the scope of the claims, without affecting the essential content of the present disclosure.