CN-122011885-A - Water-based calcium silicate board coating with super-hydrophobic, efficient insulation and flame retardant properties and preparation method thereof

Abstract

The invention discloses a super-hydrophobic, efficient-insulation and flame-retardant water-based calcium silicate board coating and a preparation method thereof, and relates to the field of coatings. The water-based silicon-calcium plate coating is prepared from 2-4wt% of water-based organosilicon impregnating water repellent, 28-35wt% of water-based epoxy resin, 4-6wt% of amino resin, 3-5wt% of film-forming auxiliary agent, 0.4-0.6wt% of water-based wetting agent and the balance of diluent. The water-based silicon-calcium plate coating has excellent flame retardant property, hydrophobic property and insulating property, is suitable for dip-coating construction of silicon-calcium plates, can obtain the thickness of a paint film of less than or equal to 15 mu m, does not cause the problems of orange peel, sagging, tear marks and the like, can play a decorative effect, and has the advantages of high drying speed, paint saving and cost reduction.

Inventors

• MA CHAO
• LU JIAHUI
• ZHANG LIN
• YAN QINGLIN
• CHEN ZHE
• HUANG SHUJIN

Assignees

• 深圳市纳能科技有限公司

Dates

Publication Date

20260512

Application Date

20260310

Claims (8)

1. 1. The water-based silicon-calcium plate coating with super-hydrophobic, efficient insulating and flame-retardant properties is characterized by being prepared from 2-4wt% of water-based organosilicon impregnating water repellent, 28-35wt% of water-based epoxy resin, 4-6wt% of amino resin, 3-5wt% of film-forming auxiliary agent, 0.4-0.6wt% of water-based wetting agent and the balance of diluent.
2. 2. The super-hydrophobic, efficient-insulation and flame-retardant-performance water-based silicon-calcium board coating as claimed in claim 1, wherein the water-based epoxy resin is an inorganic modified water-based epoxy resin, and the preparation method of the inorganic modified water-based epoxy resin is as follows: 2.5-3 parts by weight of silicate powder is prepared into silicate water solution with the mass concentration of 4-6%; dropwise adding a dilute acid solution into a silicate water solution under stirring at 0-4 ℃, adjusting the pH of the system to 3-4, and then standing for 6-12h at 25-30 ℃ to obtain polysilicic acid sol; Preparing an aminosilane coupling agent aqueous solution from 1-1.5 parts by weight of an aminosilane coupling agent and 50 parts by weight of water, adjusting the pH to 4.5-5.0, hydrolyzing at 40-50 ℃ for 0.5-1h, and then cooling to room temperature to obtain an aminosilane hydrolysate; adding an aminosilane hydrolysate into polysilicic acid sol while stirring, stirring and reacting for 2-3h, then adding 100 parts by weight of aqueous epoxy resin, stirring uniformly, adjusting pH to 8-8.5, and stirring uniformly to obtain the inorganic modified aqueous epoxy resin.
3. 3. The super-hydrophobic, efficient insulating and flame-retardant waterborne calcium silicate board coating according to claim 2, wherein the dilute acid solution is a dilute hydrochloric acid solution with a molar concentration of 1-1.5 mol/L.
4. 4. The super-hydrophobic, efficient-insulation and flame-retardant-performance water-based silicon-calcium plate coating as claimed in claim 2, wherein the aminosilane coupling agent is a primary aminosilane coupling agent.
5. 5. The super-hydrophobic, high-efficiency insulating and flame-retardant waterborne calcium silicate board coating according to claim 2, wherein the silicate is at least one of sodium silicate and potassium silicate.
6. 6. The super-hydrophobic, efficient insulating and flame-retardant waterborne calcium silicate board coating according to claim 1, wherein the waterborne organosilicon impregnating hydrophobic agent is a waterborne organosilicon hydrophobic agent RUCOSAN B-WB.
7. 7. The super-hydrophobic, efficient insulating and flame-retardant waterborne calcium silicate board coating according to claim 1, wherein the film-forming additive is propylene glycol ether film-forming additive.
8. 8. A method for preparing the aqueous calcium silicate board coating according to any one of claims 1 to 7, comprising the steps of: and uniformly mixing the film forming auxiliary agent, the water-based wetting agent and the diluent, adding the water-based organosilicon impregnating water repellent, the water-based epoxy resin and the amino resin, and uniformly stirring to obtain the water-based silicon-calcium plate coating.

Description

Water-based calcium silicate board coating with super-hydrophobic, efficient insulation and flame retardant properties and preparation method thereof Technical Field The application relates to the field of coatings, in particular to a super-hydrophobic, efficient-insulation and flame-retardant water-based calcium silicate board coating and a preparation method thereof. Background The silicon-calcium plate (also called as calcium silicate plate) is a novel building material ‌ prepared by using siliceous materials (such as quartz sand), calcareous materials (such as lime and cement) and reinforcing fibers as main raw materials through processes of pulping, forming, autoclaved curing and the like. The flame retardant property of the silicon-calcium plate can reach A1 level, no toxic smoke is released, the fire resistance limit is up to 240 minutes, the texture is light, the silicon-calcium plate is dampproof, corrosion-proof, heat-insulating and sound-insulating, the heat conductivity coefficient is less than 0.065W/m K, and the silicon-calcium plate is environment-friendly and free of asbestos. At present, the silicon-calcium plate can be used for replacing aluminum plates, such as new energy automobiles and power industries with insulation and moisture resistance requirements. Compared with an aluminous gusset plate, the imitation activity of the calcium silicate plate is better, the moisture resistance is equivalent to that of the aluminous gusset plate, but the decoration is slightly poor. Currently, a paint spraying treatment is required for the calcium silicate board to improve the decoration of the calcium silicate board, but the flame retardant property, the hydrophobic property and the insulating property of the calcium silicate board must not be reduced at the same time of the paint spraying treatment. Meanwhile, in consideration of the problem of convenience of construction, dip coating construction has excellent convenience. Disclosure of Invention The application provides a water-based silicon-calcium plate coating with super-hydrophobic, efficient insulating and flame-retardant properties and a preparation method thereof, and the water-based silicon-calcium plate coating is used for obtaining the coating which has excellent flame-retardant properties, hydrophobic properties and insulating properties and is suitable for dip-coating construction of silicon-calcium plates. In a first aspect, the water-based silicon-calcium plate coating with super-hydrophobic, efficient insulation and flame retardant properties provided by the application adopts the following technical scheme: The water-based silicon-calcium plate coating with super-hydrophobic, efficient insulating and flame-retardant properties is prepared from 2-4wt% of water-based organosilicon impregnating water repellent, 28-35wt% of water-based epoxy resin, 4-6wt% of amino resin, 3-5wt% of film-forming auxiliary agent, 0.4-0.6wt% of water-based wetting agent and the balance of diluent. According to the application, the water-based silicon-calcium board paint uses the water-based organic silicon impregnated water repellent, the water-based epoxy resin and the amino resin as film forming materials, wherein the proper water-based organic silicon impregnated water repellent is added, so that the water-repellent effect and the flame-retardant effect of a paint film can be obviously improved, the water drop angle of the paint film is more than or equal to 115 ℃ and the flame-retardant grade reaches A2, but the water-based organic silicon impregnated water repellent is not suitable to be excessively added, and the excessive addition of the paint film is difficult to realize drying under the same baking condition. In addition, the crosslinking compactness of the paint film is improved through the synergistic effect of the water-based epoxy resin and the amino resin, the hardness of the paint film can be increased, the scratch resistance of the paint film is improved, the resistance value of the paint film reaches more than 500 megaohms, and the insulation performance of the paint film is effectively improved. The film forming auxiliary agent and the aqueous wetting agent are matched with the aqueous organosilicon impregnating water repellent, the aqueous epoxy resin, the amino resin and the diluent according to the specific proportion, so that the aqueous silicon-calcium plate coating which has low viscosity and good penetrability to the silicon-calcium plate and is suitable for dip coating construction can be obtained, and when the aqueous silicon-calcium plate coating is adopted for dip coating construction of the silicon-calcium plate, the thickness of a paint film is less than or equal to 15 mu m, the problems of orange peel, sagging, tear marks and the like can not occur, the decorative effect can be achieved, and the advantages of high drying speed, paint saving and cost reduction are realized. In some specific embodiments, the aqueous epoxy re