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Permeable crosslinked concrete protective paint and preparation method thereof

A protective coating and concrete technology, applied in the direction of coating, can solve the problems of limited hydraulic concrete application, unsatisfactory coating adhesion, failure of protective effect, etc. knotty effect

Inactive Publication Date: 2015-12-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first three types belong to surface film-forming coatings, which have good water resistance, mechanical properties and decorative properties. However, such coatings are generally composed of primers, intermediate paints and topcoats. The difference in adhesion between them makes the overall adhesion of the coating The focus is not ideal, easy to crack and fall off
Silicone-based coatings are permeable coatings, which have the advantages of improving concrete impermeabi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In Example 1 and Example 2, the polysiloxane-epoxy resin used is prepared from polymethylphenylsiloxane, modified hydrogenated bisphenol A type epoxy resin and organotin catalyst, Its synthesis is carried out as follows: (1) preparation of modified hydrogenated bisphenol A type epoxy resin: 1. according to the mass ratio of each component: hydrogenated bisphenol A type epoxy resin: polyethylene glycol PEG1000:25wt% The aqueous sodium hydroxide solution=20:10:1, select hydrogenated bisphenol A type epoxy resin, macrogol PEG1000 and sodium hydroxide aqueous solution; 2. Hydrogenated bisphenol A type epoxy resin and polyethylene glycol are in three ports Mix in the flask, and heat to 70°C until the two are melted, then add 25wt% sodium hydroxide aqueous solution dropwise to the three-necked flask, and control the temperature at 70°C for 3 hours to obtain the modified hydrogenated bisphenol A ring Oxygen resin; (2) polysiloxane-epoxy resin synthesis: ① according to the mass...

Embodiment 3

[0026] In Example 3 and Example 4, the polysiloxane-epoxy resin used is prepared from polymethylphenylsiloxane, modified hydrogenated bisphenol A type epoxy resin and organotin catalyst, Its synthesis is carried out as follows: (1) preparation of modified hydrogenated bisphenol A type epoxy resin: 1. according to the mass ratio of each component: hydrogenated bisphenol A type epoxy resin: polyethylene glycol PEG1000:25wt% The aqueous sodium hydroxide solution=20:10:1, select hydrogenated bisphenol A type epoxy resin, macrogol PEG1000 and sodium hydroxide aqueous solution; 2. Hydrogenated bisphenol A type epoxy resin and polyethylene glycol are in three ports Mix in the flask, and heat to 70°C until the two are melted, then add 25wt% sodium hydroxide aqueous solution dropwise to the three-necked flask, and control the temperature at 70°C for 3 hours to obtain the modified hydrogenated bisphenol A ring Oxygen resin; (2) polysiloxane-epoxy resin synthesis: 1. according to the mas...

Embodiment 5

[0027]In Example 5 and Example 6, the polysiloxane-epoxy resin used is prepared from polymethylphenylsiloxane, modified hydrogenated bisphenol A type epoxy resin and organotin catalyst, Its synthesis is carried out as follows: (1) preparation of modified hydrogenated bisphenol A type epoxy resin: 1. according to the mass ratio of each component: hydrogenated bisphenol A type epoxy resin: polyethylene glycol PEG1000:25wt% The aqueous sodium hydroxide solution=20:10:1, select hydrogenated bisphenol A type epoxy resin, macrogol PEG1000 and sodium hydroxide aqueous solution; 2. Hydrogenated bisphenol A type epoxy resin and polyethylene glycol are in three ports Mix in the flask, and heat to 70°C until the two are melted, then add 25wt% sodium hydroxide aqueous solution dropwise to the three-necked flask, and control the temperature at 70°C for 3 hours to obtain the modified hydrogenated bisphenol A ring Oxygen resin; (2) polysiloxane-epoxy resin synthesis: ① according to the mass ...

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Abstract

The invention relates to a permeable crosslinked concrete protective paint and a preparation method thereof. The invention is characterized in that the permeable crosslinked concrete protective paint is composed of the following raw materials in parts by mass: 100 parts of polysiloxane-epoxy resin, 10-35 parts of curing agent, 2-8 parts of permeation promoter, 3-11 parts of film formation assistant, 0.1-2 parts of defoaming agent and 0.2-2 parts of anti-sagging agent. The permeable crosslinked concrete protective paint can be directly used on a concrete surface with higher water content, is convenient for construction, and can form a compact protective layer on the concrete surface under the permeable crosslinking action, thereby enhancing the permeation resistance, carbonization resistance and abrasion resistance of the concrete.

Description

technical field [0001] The invention relates to a permeable and cross-linked concrete protective coating and a preparation method thereof. Background technique [0002] The total amount of water resources in my country is abundant, but the amount of water per capita is small and unevenly distributed in time and space. Large-scale water transfer projects are one of the major measures to optimize the time-space allocation of water resources in my country. As an important part of large-scale water transmission projects, hydraulic concrete structures such as channels, aqueducts, and pipe culverts are easily affected by climate, geological and other environmental factors during operation, resulting in various diseases. Common diseases include cracks in concrete due to temperature stress, resulting in leakage, carbonation of concrete, and surface erosion. If these diseases cannot be detected and prevented in time, they will develop further and seriously endanger the durability an...

Claims

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Application Information

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IPC IPC(8): C04B41/49C09D187/00C09D7/12C08G81/00
Inventor 余剑英吴伟飞章灿林易益尹印杨光吴力立
Owner WUHAN UNIV OF TECH
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