阅读说明：本技术 一种无机液态涂料及其制备方法 (Inorganic liquid coating and preparation method thereof ) 是由 李加圣 张明星 于 2021-01-15 设计创作，主要内容包括：本发明公开了一种无机液态涂料及其制备方法,一种无机液态涂料,包括重量比例为15～25份的改性硅酸钾、5～10份的改性硅溶胶、10～20份的金红石型钛白粉、5～15份的煅烧高岭土、15～25份的重质碳酸钙、0.4～0.6份的增稠剂以及0.4～0.6份的稳定剂,剩余为水,所述改性硅酸钾为纳米二氧化硅改性硅酸钾,所述改性硅溶胶为高分子材料改性硅溶胶。一种无机液态涂料的制备方法包括a)初混和b)终混。本发明采用了改性无机硅酸盐和改性硅溶胶聚合缩水原理制备了一种无机液态涂料,不添加任何有机溶剂和防腐材料,生产方法简单,施工简便,所制备的涂料在干燥形成漆膜后,具有无毒、坚韧、不易燃烧、不易受微生物侵害和零VOC排放等特点。(The invention discloses an inorganic liquid coating and a preparation method thereof, wherein the inorganic liquid coating comprises 15-25 parts by weight of modified potassium silicate, 5-10 parts by weight of modified silica sol, 10-20 parts by weight of rutile titanium dioxide, 5-15 parts by weight of calcined kaolin, 15-25 parts by weight of ground calcium carbonate, 0.4-0.6 part by weight of thickening agent and 0.4-0.6 part by weight of stabilizing agent, the balance is water, the modified potassium silicate is nano-silica modified potassium silicate, and the modified silica sol is a high molecular material modified silica sol. A preparation method of an inorganic liquid coating comprises a) primary mixing and b) final mixing. The invention adopts the principle of polymerization and shrinkage of modified inorganic silicate and modified silica sol to prepare the inorganic liquid coating, does not add any organic solvent and anticorrosive material, has simple production method and simple and convenient construction, and the prepared coating has the characteristics of no toxicity, toughness, difficult combustion, difficult invasion by microorganisms, zero VOC emission and the like after being dried to form a paint film.)

1. An inorganic liquid coating, characterized in that: the modified potassium silicate-silica composite material comprises, by weight, 15-25 parts of modified potassium silicate, 5-10 parts of modified silica sol, 10-20 parts of rutile titanium dioxide, 5-15 parts of calcined kaolin, 15-25 parts of heavy calcium carbonate, 0.4-0.6 part of thickening agent and 0.4-0.6 part of stabilizing agent, wherein the balance is water, the modified potassium silicate is nano-silica modified potassium silicate, and the modified silica sol is a high-molecular material modified silica sol.

2. The inorganic liquid coating of claim 1, wherein: the coating also comprises an auxiliary additive in a weight ratio of 0.5-0.8, wherein the auxiliary additive is one or a combination of two of a defoaming agent and a dispersing agent.

3. The inorganic liquid coating of claim 2, wherein: the modified silicon dioxide modified calcium carbonate comprises, by weight, 20 parts of modified potassium silicate, 10 parts of modified silica sol, 15 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 20 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 23.39 parts of water.

4. The inorganic liquid coating of claim 2, wherein: the modified silicon dioxide modified calcium carbonate comprises 15 parts of modified potassium silicate, 5 parts of modified silica sol, 10 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 25 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 33.39 parts of water in weight ratio.

5. The inorganic liquid coating of claim 2, wherein: the modified silicon dioxide modified calcium carbonate comprises, by weight, 25 parts of modified potassium silicate, 5 parts of modified silica sol, 20 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 15 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 23.39 parts of water.

6. An inorganic liquid coating according to any one of claims 2 to 5, wherein: the solid content of the modified potassium silicate is 25-35%, and the solid content of the modified silica sol is 25-35%.

7. An inorganic liquid coating according to any one of claims 2 to 5, wherein: the fineness of the calcined kaolin is 1000-1400 meshes, and the fineness of the heavy calcium carbonate is 600-1000 meshes.

8. An inorganic liquid coating according to any one of claims 2 to 5, wherein: the thickener is hydroxyethyl cellulose, the stabilizer is a quaternary ammonium salt stabilizer, the defoaming agent is a mineral oil defoaming agent, and the dispersant is sodium polycarboxylate.

9. The preparation method of the inorganic liquid coating is characterized by comprising the following steps:

a) primary mixing: weighing 15-25 parts of modified potassium silicate, 5-10 parts of modified silica sol, 10-20 parts of rutile titanium dioxide, 5-15 parts of calcined kaolin, 15-25 parts of heavy calcium carbonate, 0.4-0.6 part of thickening agent and 0.4-0.6 part of stabilizing agent in weight proportion, and dispersing and mixing the rutile titanium dioxide, the calcined kaolin, the heavy calcium carbonate, the thickening agent and water at high speed to obtain a primary mixed solution, wherein the balance is water;

b) final mixing: adding the modified potassium silicate, the modified silica sol and the stabilizer into the primary mixed liquid obtained in the step a), and then dispersing and mixing at a low speed to obtain a finished product.

10. The method of claim 5, wherein the step of preparing the inorganic liquid coating comprises: in the step a), the stirring speed of high-speed dispersion and mixing is 1000-1400 r/min, the stirring time is 10-20 min, and the testing fineness of a scraper is less than or equal to 50 microns after stirring is finished; in the step b), the stirring speed of the low-speed dispersion mixing is 500-700 r/min.

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of coatings, in particular to an inorganic liquid coating and a preparation method thereof.

[ background of the invention ]

At present, the inorganic liquid coating sold in the market is basically a coating taking potassium silicate or silica sol compounded organic synthetic resin emulsion as a film forming material, and the difference is only more than small amount. Although it has good flexibility of paint film, it can burn because of the addition of organic synthetic resin emulsion, and smoke is generated during burning. In addition, if the mildew preventive is not added, the coating is easy to grow mildew, and if the mildew preventive is added, the coating does not accord with the green and environment-friendly concept, and the coating also contains limited substances such as VOC (volatile organic Compounds) and the like.

[ summary of the invention ]

The invention aims to solve the problems in the prior art and provides an inorganic liquid coating and a preparation method thereof.

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

an inorganic liquid coating comprises, by weight, 15-25 parts of modified potassium silicate, 5-10 parts of modified silica sol, 10-20 parts of rutile titanium dioxide, 5-15 parts of calcined kaolin, 15-25 parts of ground limestone, 0.4-0.6 part of a thickening agent and 0.4-0.6 part of a stabilizing agent, and the balance is water, wherein the modified potassium silicate is nano-silica modified potassium silicate, and the modified silica sol is a high-molecular material modified silica sol.

Preferably, the anti-foaming agent further comprises an auxiliary additive in a weight ratio of 0.5-0.8, wherein the auxiliary additive is one or a combination of two of a defoaming agent and a dispersing agent.

Preferably, the modified silicon dioxide paint comprises 20 parts of modified potassium silicate, 10 parts of modified silica sol, 15 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 20 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 23.39 parts of water in weight ratio.

Preferably, the modified silicon dioxide paint comprises 15 parts of modified potassium silicate, 5 parts of modified silica sol, 10 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 25 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 33.39 parts of water in weight ratio.

Preferably, the modified silicon dioxide paint comprises 25 parts of modified potassium silicate, 5 parts of modified silica sol, 20 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 15 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 23.39 parts of water in weight ratio.

Preferably, the solid content of the modified potassium silicate is 25-35%, and the solid content of the modified silica sol is 25-35%.

Preferably, the fineness of the calcined kaolin is 1000-1400 meshes, and the fineness of the heavy calcium carbonate is 600-1000 meshes.

Preferably, the thickener is hydroxyethyl cellulose, the stabilizer is a quaternary ammonium salt stabilizer, the defoamer is a mineral oil defoamer, and the dispersant is sodium polycarboxylate.

A preparation method of an inorganic liquid coating comprises the following steps:

a) primary mixing: weighing 15-25 parts of modified potassium silicate, 5-10 parts of modified silica sol, 10-20 parts of rutile titanium dioxide, 5-15 parts of calcined kaolin, 15-25 parts of heavy calcium carbonate, 0.4-0.6 part of thickening agent and 0.4-0.6 part of stabilizing agent in weight proportion, and dispersing and mixing the rutile titanium dioxide, the calcined kaolin, the heavy calcium carbonate, the thickening agent and water at high speed to obtain a primary mixed solution, wherein the balance is water;

b) final mixing: adding the modified potassium silicate, the modified silica sol and the stabilizer into the primary mixed liquid obtained in the step a), and then dispersing and mixing at a low speed to obtain a finished product.

Preferably, in the step a), the stirring speed of high-speed dispersion and mixing is 1000-1400 r/min, the stirring time is 10-20 min, and the fineness of a scraper test after stirring is less than or equal to 50 microns; in the step b), the stirring speed of the low-speed dispersion mixing is 500-700 r/min.

The invention has the beneficial effects that: the inorganic liquid coating is prepared by adopting the principle of polymerization shrinkage of the modified inorganic silicate and the modified silica sol, no organic solvent or anticorrosive material is added, the production method is simple, the construction is simple and convenient, the prepared coating has the characteristics of no toxicity, toughness, difficult combustion, difficult invasion by microorganisms, zero VOC (volatile organic compounds) emission and the like after being dried to form a paint film, the problems that the paint film of the inorganic liquid coating on the current market is easy to generate mildew spots, can be combusted, has single color, is unstable in storage and the like are solved, the inorganic liquid coating can be used for wall decoration of tunnels, subways, schools, hospitals, houses and villas and the like with higher requirements, and not only has the decorative effect of the latex paint, but also is green and environment-friendly.

[ detailed description ] embodiments

The first embodiment is as follows:

firstly, 20 parts of modified potassium silicate, 10 parts of modified silica sol, 15 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 20 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 23.39 parts of water are weighed according to the weight ratio.

Wherein the solid content of the modified potassium silicate is 28%, the pH value is 11-12, and the modified potassium silicate can resist the high temperature of 1200 ℃, such as 1378A modified potassium silicate produced by Jiangsu Union science and technology Limited.

The solid content of the modified silica sol is 28 percent, and the modified silica sol can resist the high temperature of 1000 ℃, such as 1566 produced by Jiangsu national union science and technology limited company.

The fineness of the calcined kaolin was 1250 mesh.

The fineness of the heavy calcium carbonate is 800 meshes, and free Ca is selected²⁺Heavy calcium carbonate with very low ion content is used as filling material, such as gt-3 produced by Suzhou Hesheng. Heavy calcium carbonate to control its internal Ca²⁺The reason for the ion content is that free Ca²⁺The less ions, the better the storage of the coating, otherwise, Ca²⁺The ions react with the potassium silicate to produce calcium silicate, which causes the viscosity of the inorganic liquid coating to increase, forming a "hepatolized" state.

The thickener is hydroxyethyl cellulose, such as HBR250 produced by Sustailon.

The stabilizer is quaternary ammonium salt stabilizer, such as PULAS produced by Clariant corporation. The quaternary ammonium salt stabilizer is the most commonly used stabilizer in inorganic coatings, is a cationic surfactant with various functional groups, can ensure the viscosity stability of the inorganic coatings in the storage period, and reduces the risk of liver transformation of the coatings.

The defoaming agent is mineral oil defoaming agent, such as SD-220 produced by Haimines.

The dispersant is sodium polycarboxylate, such as SN-5040 produced by Nippon nopecten.

During preparation, firstly, according to the formula amount, the rutile type titanium dioxide, the calcined kaolin, the ground calcium carbonate, the thickening agent, the dispersing agent, the defoaming agent and water are dispersed and mixed at a high speed (the high speed is dispersed and mixed for 15min, and the stirring speed is 1200r/min) to obtain a primary mixed solution. After the fineness of the scraper test is less than or equal to 50 mu m, the rotating speed is reduced to 500r/min, and then the modified potassium silicate, the modified silica sol and the stabilizer are added to carry out low-speed dispersion and mixing at the stirring speed of 600 r/min. In addition, the defoaming agent may be divided into two parts, and added separately in the high-speed dispersion mixing stage and the low-speed dispersion mixing stage, thereby avoiding foaming.

Example two:

weighing 15 parts of modified potassium silicate, 5 parts of modified silica sol, 10 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 25 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 33.39 parts of water according to the weight ratio.

The other steps are the same as those of the first embodiment.

Example three:

weighing 25 parts of modified potassium silicate, 5 parts of modified silica sol, 20 parts of rutile type titanium dioxide, 10 parts of calcined kaolin, 15 parts of heavy calcium carbonate, 0.5 part of thickening agent, 0.5 part of stabilizing agent, 0.01 part of defoaming agent, 0.6 part of dispersing agent and 23.39 parts of water according to the weight ratio.

The other steps are the same as those of the first embodiment.

Example four:

respectively carrying out roller coating or spraying construction on the finished inorganic liquid coating prepared in the first to third embodiments, wherein the dosage is about 0.3-0.4 kg/m after 2-3 times of construction². After the inorganic liquid coating prepared in the first to third examples is dried and a paint film is formed, the inorganic liquid coating is respectively dried and formedThe paint film was tested for flame gun burning, scrub resistance and mold resistance, and the test results were as follows:

table 1 test results of examples one to three

As shown in table 1 above, after the finished products prepared in the first to third examples are constructed and dried, the paint film (i) can keep the paint film not reddish, not giving out naked flame and not generating obvious smoke after being fired by a flame gun at a temperature of 1200 ℃, and the fire-resistant grade can be far higher than the index required by grade a in the national standard GB 8624-2012; secondly, the paint film is tough and tough, and can be scrubbed for more than 10000 times; the film forming performance is changed after the modified potassium silicate and the modified silica sol are compounded, the PH value reaches 11, and the modified potassium silicate and the modified silica sol are strong alkaline, so that the mould-proof effect reaches the I type index 0 grade in the national standard GB/T1741-2007.

At present, the coating material using potassium silicate as the main film forming substance on the market must be added with a certain amount of organic synthetic resin during the preparation, and only can be made into a single white coating material, while the coating material using silica sol as the main film forming substance must be compounded with the organic synthetic resin exceeding the usage amount of the silica sol during the preparation, so that the bonding can be firm. These are not inorganic coatings in the true sense, but only organic-inorganic composite coatings.

Compared with potassium silicate and silica sol, the modified potassium silicate and the modified silica sol have greatly improved storage stability and film-forming compactness. Particularly, when the modified potassium silicate and the modified silica sol are used in a matching way, dehydration polycondensation reaction can be carried out between modified potassium silicate molecules and modified silica sol molecules, between modified silica sol molecules and modified silica sol molecules, between modified potassium silicate molecules and modified potassium silicate molecules, and between modified potassium silicate molecules, modified silica sol molecules and silicate in the base cement, so that the complicated network structure shown as the following is formed:

moreover, the intervention of the high polymer material changes the paint film from hard and brittle to tough, so that the hardness, weather resistance, water resistance, scrub resistance and bonding strength of the paint after film forming are greatly improved. In addition, the modified silica sol also improves the phenomenon that a modified potassium silicate paint film is easy to separate salt in a high-humidity environment, so that the color consistency of the paint film is greatly improved, the paint prepared by the invention can be prepared into various colors like common organic synthetic resin paint, and the application universality of the paint is greatly improved. Because the modified potassium silicate has strong basicity, the pH value of the prepared inorganic liquid coating can reach about 11, so that bacteria and mould are difficult to live and propagate in a paint film formed by drying the coating, and a purification auxiliary effect is realized on a space coated with the inorganic liquid coating. And because the modified potassium silicate and the modified silica sol are both inorganic film forming substances, the coating does not burn and generate smoke within 1000 ℃, and has the effect of delaying burning in fire emergency compared with the traditional inorganic-organic composite coating.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.