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Composite nano waterproof heat-insulating coating for buildings and preparation method thereof

A technology of composite nanomaterials and heat-insulating coatings, which is applied in the field of composite nano-hydrophobic heat-insulating coatings for buildings and its preparation, can solve problems such as single function and poor environmental protection, and achieve enhanced heat insulation performance and good heat insulation effect , the effect of reducing the emission of odor

Active Publication Date: 2021-03-26
艾斯贝科环保科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of single function and poor environmental protection of coatings currently on the market, the invention provides a new type of waterproof and heat-insulating coating for buildings, which has good heat insulation effect, good waterproof performance, long service life, and is economical, safe and environmentally friendly. Broad market application potential

Method used

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  • Composite nano waterproof heat-insulating coating for buildings and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A composite nano-waterproof and heat-insulating coating for buildings, comprising the following raw materials in parts by weight: 150 parts of emulsion, 60 parts of water-based polyurethane, 60 parts of filler, 60 parts of heat-insulating composite nano-material, 30 parts of silicone hydrophobic agent, film-forming auxiliary 5 parts of agent, 3 parts of defoamer, 3 parts of synergist.

[0026] The emulsion used in this example is a polyacrylate emulsion with a solid content of 50%.

[0027] The heat-insulating composite nanomaterial is prepared by the following method: after mixing the nano-silica powder and the nano-titanium dioxide powder according to the mass ratio of 1:1, they are completely immersed in a nitric acid solution with a mass percentage of 50%. , soaked for 24 hours, then washed twice with deionized water, then soaked in a 50% methyltriethoxysilane solution for 6 hours, then placed in a muffle furnace for calcination at 450°C for 3 hours, cooled to At r...

Embodiment 2

[0040] A composite nano-waterproof and heat-insulating coating for buildings, comprising the following raw materials in parts by weight: 180 parts of emulsion, 70 parts of water-based polyurethane, 70 parts of filler, 70 parts of heat-insulating composite nano-material, 40 parts of silicone hydrophobic agent, film-forming auxiliary 8 parts of agent, 5 parts of defoamer, 4 parts of synergist.

[0041] The emulsion used in this example is a polyacrylate emulsion with a solid content of 55%.

[0042] The heat-insulating composite nanomaterial is prepared by the following method: after mixing the nano-silica powder and the nano-titanium dioxide powder according to the mass ratio of 1:1, they are completely immersed in a nitric acid solution with a mass percentage of 50%. , soaked for 24 hours, then washed 3 times with deionized water, then soaked in a 50% methyltriethoxysilane solution for 10 hours, then placed in a muffle furnace and calcined at 450 ° C for 4 hours, cooled to At...

Embodiment 3

[0055] A composite nano-waterproof and heat-insulating coating for buildings, comprising the following raw materials in parts by weight: 200 parts of emulsion, 80 parts of water-based polyurethane, 80 parts of filler, 80 parts of heat-insulating composite nano-material, 50 parts of silicone hydrophobic agent, film-forming auxiliary 10 parts of agent, 6 parts of defoamer, 6 parts of synergist.

[0056] The emulsion used in this example is a polyacrylate emulsion with a solid content of 60%.

[0057] The heat-insulating composite nanomaterial is prepared by the following method: after mixing the nano-silica powder and the nano-titanium dioxide powder according to the mass ratio of 1:1, they are completely immersed in a nitric acid solution with a mass percentage of 50%. , soaked for 24 hours, then washed 3 times with deionized water, then soaked in a 50% methyltriethoxysilane solution for 12 hours, and then placed in a muffle furnace for calcination at 450 ° C for 5 hours, coole...

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Abstract

The invention discloses a composite nano waterproof heat-insulating coating for buildings and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared fromthe following raw materials in parts by weight: 150-200 parts of emulsion, 60-80 parts of waterborne polyurethane, 60-80 parts of filler, 60-80 parts of a heat insulation composite nano material, 30-50 parts of an organic silicon hydrophobic agent, 5-10 parts of a coalescing agent, 3-6 parts of a defoaming agent and 3-6 parts of a synergist. According to the invention, a large amount of heat-insulating composite nano-materials are added, the hydrophobic and heat-insulating properties of the material are greatly improved through two-step modification of acid etching and hydrophobicity, and meanwhile, the added synergist has very strong adhesion ability, can be firmly adsorbed on the surfaces of the nano-materials and filler particles, and is stably dispersed in the coating, and the peelingand cracking phenomena of the subsequent coating are greatly reduced and the service life of the coating is prolonged. The coating has the advantages of good heat-insulating effect, good water resistance and long service life, and has wide market application potential.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a composite nano-hydrophobic heat-insulating coating for buildings and a preparation method thereof. Background technique [0002] Waterproof coating is one of the important components of building functional materials. In building construction, waterproof coatings mainly form a waterproof layer on the surface of buildings to achieve the purpose of waterproofing and anti-leakage. Therefore, the performance and selection of waterproof coatings are directly related to the use effect and service life of buildings. At present, the waterproof coatings on the market are mainly polyurethane waterproof coatings, acrylic waterproof coatings and other products. Among them, polyurethane waterproof coatings have excellent mechanical properties and good waterproof performance, but their weather resistance is not good, and they are prone to foaming in high-temperature and high-humidity enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D175/04C09D7/62C09D7/61C09D7/65
CPCC09D133/04C09D7/62C09D7/61C09D7/65C09D7/70C08K2201/011C08K2003/2241C08L2205/035C08L2205/025C08L75/04C08L77/04C08L5/08C08K13/06C08K9/02C08K9/06C08K3/36C08K3/22C08K3/34C08K7/26Y02P20/10
Inventor 李桂丽
Owner 艾斯贝科环保科技(北京)有限公司
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