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Preparation method of composite polyurethane waterproof coating

A composite polyurethane and waterproof coating technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of affecting waterproof durability, mechanical ultraviolet aging resistance and poor thermal oxygen aging performance.

Inactive Publication Date: 2019-11-12
慈溪市果雨电子商务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main technical problem to be solved by the present invention is to provide a preparation method of a composite polyurethane waterproof coating for the defects that the common polyurethane waterproof coating has poor mechanical resistance to ultraviolet aging and thermal oxygen aging and easily affects its waterproof durability.

Method used

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  • Preparation method of composite polyurethane waterproof coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of silicone microcapsules:

[0044] According to the mass ratio of 1:4:20, polyvinyl alcohol, maltodextrin and water are mixed and placed in an ultrasonic oscillator, and dissolved by ultrasonic vibration at a frequency of 25kHz to obtain a coating solution, and then the mass ratio is 1:8. Methylcyclotetrasiloxane and coating liquid are mixed and placed in a high-speed disperser, and dispersed at a high speed of 3000r / min for 5 minutes to obtain an oil-in-water emulsion, and then the oil-in-water emulsion is sprayed with a spray dryer Dried to obtain organosilicon microcapsules for subsequent use;

[0045] Preparation of clear and transparent hydrolyzate:

[0046] According to the mass ratio of 1:2:5, mix ethyl orthosilicate with absolute ethanol and deionized water evenly, and dropwise drop into nitric acid solution with a concentration of 0.5mol / L, and stir until ethyl orthosilicate is hydrolyzed to obtain Clear and transparent hydrolyzate;

[0047] Pre...

Embodiment 2

[0058] Preparation of silicone microcapsules:

[0059] According to the mass ratio of 1:4:20, polyvinyl alcohol, maltodextrin and water are mixed and placed in an ultrasonic oscillator, and dissolved by ultrasonic vibration at a frequency of 30 kHz to obtain a coating solution, and then the mass ratio is 1:8. Methylcyclotetrasiloxane and coating liquid are mixed and placed in a high-speed disperser, and dispersed at a high speed of 3500r / min for 7.5 minutes to obtain an oil-in-water emulsion, and then the oil-in-water emulsion is sprayed with a spray dryer Spray drying to obtain organosilicon microcapsules for subsequent use;

[0060] Preparation of clear and transparent hydrolyzate:

[0061] According to the mass ratio of 1:2:5, mix ethyl orthosilicate with absolute ethanol and deionized water evenly, and dropwise drop into nitric acid solution with a concentration of 0.5mol / L, and stir until ethyl orthosilicate is hydrolyzed to obtain Clear and transparent hydrolyzate;

...

Embodiment 3

[0073] Preparation of silicone microcapsules:

[0074] According to the mass ratio of 1:4:20, polyvinyl alcohol, maltodextrin and water are mixed and placed in an ultrasonic oscillator, and dissolved by ultrasonic vibration at a frequency of 35kHz to obtain a coating solution, and then the mass ratio is 1:8. Methylcyclotetrasiloxane and coating liquid are mixed and placed in a high-speed disperser, and dispersed at a high speed of 4000r / min for 10 minutes to obtain an oil-in-water emulsion, and then the oil-in-water emulsion is sprayed with a spray dryer Dried to obtain organosilicon microcapsules for subsequent use;

[0075] Preparation of clear and transparent hydrolyzate:

[0076] According to the mass ratio of 1:2:5, mix ethyl orthosilicate with absolute ethanol and deionized water evenly, and dropwise drop into nitric acid solution with a concentration of 0.5mol / L, and stir until ethyl orthosilicate is hydrolyzed to obtain Clear and transparent hydrolyzate;

[0077] Pr...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a composite polyurethane waterproof coating. The method comprises the followingsteps: firstly, preparing organic silicon microcapsules by taking polyvinyl alcohol and maltodextrin as wall materials and organosilane as a core material; then mixing tetraethoxysilane and calcium nitrate to perform a reaction, and preparing tricalcium silicate self-made filler by a sol-gel method; then mixing zinc nitrate, ferric nitrate and tetrabutyl titanate and carrying out a reaction to generate nano metal oxide filter residues in the presence of ammonia water; and finally, preparing the waterborne polyurethane emulsion. The polyurethane waterproof paint has the advantages of great mechanical ultraviolet aging resistance, thermo-oxidative aging resistance and waterproofness, durable waterproofness and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of a composite polyurethane waterproof coating. Background technique [0002] With the rapid development of my country's economic construction, especially infrastructure, the demand for waterproof materials is increasing, and the scope of application is also expanding rapidly. There are many kinds of waterproof materials, especially environmental protection and multi-functionality become the main development direction of waterproof materials in the future. Among them, polymer modified asphalt has excellent waterproof performance, good elasticity, strong weather resistance, fatigue resistance, anti-aging and other characteristics, and has It has the advantages of reliability and economy, and is widely used in anti-seepage and waterproof projects such as basement floors, side walls, subways, tunnels, roofs, and landfills. [0003] At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/61C09D7/48C09D7/63
CPCC08K2003/2241C08K2003/2296C08K2201/011C08L2201/08C09D175/14C09D7/48C09D7/61C09D7/63C08L29/04C08K9/10C08K5/5419C08K3/34C08K3/22C08K13/06
Inventor 艾旭盛
Owner 慈溪市果雨电子商务有限公司
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