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Self-repairing polymer cement waterproof paint and preparation method thereof

A waterproof coating and self-repairing technology, applied in the direction of silicon compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as limited repairing effect, secondary cracking of cracks, leakage, etc., to prevent secondary cracking and improve water resistance , to promote the effect of uniform distribution

Inactive Publication Date: 2020-08-25
蔡露
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this repair effect is very limited. If it is not consolidated in time, the crack will appear secondary cracking, and leakage will still occur after the dry-wet cycle

Method used

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  • Self-repairing polymer cement waterproof paint and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Mix ethyl orthosilicate, ethanol, and deionized water evenly, use oxalic acid to adjust the pH value to 3, let it stand for 10 hours to hydrolyze the ethyl orthosilicate, then add glycerol, and use ammonia water to adjust the pH value to 8 And stand still for 36h, then heated to 50°C and stand still for 20h, cooled to room temperature, used n-hexane for solvent exchange, then added 1H,1H,2H,2H-perfluorodecyltriethoxysilane and stood for 12h, Filtration, classification drying, and grinding to obtain superhydrophobic silica airgel powder; ethyl orthosilicate, ethanol, deionized water, glycerol, 1H,1H,2H,2H-perfluorodecyltriethoxy The mass ratio of silane is 20:50:50:3:2; the method of fractional drying is firstly drying at 75°C for 4 hours, then drying at 100°C for 1 hour, and then drying at 140°C for 2 hours;

[0025] (2) Add sodium alginate and polyoxyethylene octadecylamine into water, stir until they are no longer dissolved, then add superhydrophobic silica airgel...

Embodiment 2

[0029] (1) Mix ethyl orthosilicate, ethanol, and deionized water evenly, use oxalic acid to adjust the pH value to 3, let it stand for 8 hours to hydrolyze the ethyl orthosilicate, then add glycerol, and use ammonia water to adjust the pH value to 8 And stand still for 48h, then heated to 50°C and stand still for 15h, cooled to room temperature, used n-hexane for solvent exchange, then added 1H,1H,2H,2H-perfluorodecyltriethoxysilane and stood for 18h, Filtration, classification drying, and grinding to obtain superhydrophobic silica airgel powder; ethyl orthosilicate, ethanol, deionized water, glycerol, 1H,1H,2H,2H-perfluorodecyltriethoxy The mass ratio of silane is 20:50:50:3:2; the method of fractional drying is to dry at 75°C for 6h, then at 90°C for 1h, and then at 120°C for 2h;

[0030] (2) Add sodium alginate and polyoxyethylene octadecylamine into water, stir until they are no longer dissolved, then add superhydrophobic silica airgel powder, cool down to 1°C, and stir an...

Embodiment 3

[0034] (1) Mix ethyl orthosilicate, ethanol, and deionized water evenly, use oxalic acid to adjust the pH value to 3, let it stand for 9 hours to hydrolyze the ethyl orthosilicate, then add glycerol, and adjust the pH value to 8 with ammonia water And stand for 40h, then heated to 50°C and stand for 18h, cooled to room temperature, solvent exchange with n-hexane, then add 1H,1H,2H,2H-perfluorodecyltriethoxysilane and stand for 15h, Filtration, classification drying, and grinding to obtain superhydrophobic silica airgel powder; ethyl orthosilicate, ethanol, deionized water, glycerol, 1H,1H,2H,2H-perfluorodecyltriethoxy The mass ratio of silane is 28:50:50:1:2; the method of fractional drying is to dry at 73°C for 5h, then at 90°C for 2h, and then at 130°C for 1h;

[0035] (2) Add sodium alginate and polyoxyethylene octadecylamine into water, stir until they are no longer dissolved, then add superhydrophobic silica airgel powder, cool down to 1°C, and stir and disperse at 500rpm...

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Abstract

The invention relates to the field of water-based functional paints, and provides a self-repairing polymer cement waterproof paint and a preparation method thereof. The waterproof paint is composed ofa liquid material and a powder material. The liquid material contains a self-repairing core-shell capsule. A shell layer of the capsule is resin, and an inner core of the capsule is composed of sodium alginate, polyoxyethylene octadecylamine, super-hydrophobic silica aerogel powder and water. When a coating has fine cracks, the shell layer of the capsule is broken, the sodium alginate is in contact with calcium hydroxide obtained after cement hydration, crosslinking is conducted under the action of Ca<2+>, and a three-dimensional net-shaped object is formed to block the cracks. The super-hydrophobic silicon dioxide aerogel powder is distributed in the network structure of the three-dimensional net-shaped object, so strength is improved, secondary cracking is prevented, and water resistance is improved by utilizing the super-hydrophobicity of the super-hydrophobic silicon dioxide aerogel powder. Therefore, a coating formed by the polymer cement waterproof paint has good self-repairingperformance, secondary cracking of repaired cracks is avoided, and good impermeability is still kept after dry-wet circulation.

Description

technical field [0001] The invention belongs to the technical field of water-based functional coatings, and provides a self-repairing polymer cement waterproof coating and a preparation method. Background technique [0002] Building leakage will affect the quality of building appearance, applicability and durability, and even threaten structural safety. Building waterproofing is of great significance to maintaining personal safety and preventing property loss. At present, commonly used building waterproof materials include waterproof coiled materials, waterproof coatings, rigid waterproof materials, tile waterproof materials and building sealing materials. [0003] There are many types of waterproof coatings. Polymer cement waterproof coatings are water-based coatings that use water as a solvent. They are environmentally friendly coatings. It is widely used in waterproofing of kitchens, bathrooms, exterior walls and balconies. Polymer cement waterproof coatings are mainly ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/02C04B20/10C04B14/06C01B33/159C01B33/158C04B24/38C04B24/32C04B22/00C04B111/27
CPCC01B33/1585C01B33/159C04B14/064C04B18/02C04B20/1033C04B28/00C04B2111/00508C04B2111/27C04B24/38C04B24/32C04B22/002C04B14/00C04B2103/302C04B24/2623C04B24/2641C04B22/0053
Inventor 蔡露
Owner 蔡露
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