Hydraulic-pressure-resistant and anti-freezing/thawing coating for concrete structure and preparation method of hydraulic-pressure-resistant and anti-freezing/thawing coating

A technology of concrete structure and water pressure resistance, applied in the direction of coating, etc., can solve the problems that concrete protective coatings cannot take into account water pressure resistance, freeze-thaw resistance and anti-corrosion performance, and achieve high hydrophobicity, reduce temperature changes, and enhance adhesion. Effect

Active Publication Date: 2019-08-02
CHONGQING JINHONG CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art above, the object of the present invention is to provide a water pressure-resistant freeze-thaw resistant coating for concrete structures and a preparation method thereof,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] 1) Weigh polyvinyl alcohol and styrene polymer microspheres with amine salt ions and carboxylic acid groups to dissolve in butyl acetate, add isocyanate, stir and reflux in a water bath at 60~70℃ for 1~2h, react After the end, add trimethylpentyltriethoxysilane and siloxanyl organosilicon to the above solution and continue to stir and reflux, and the temperature is reduced to normal temperature after the reaction;

[0030] 2) Add silicone resin emulsion, acrylic emulsion, hydrophobically modified copolymer ammonium salt dispersant, and butyl hydroquinone to the reaction solution obtained in step 2) and mix it uniformly, then add nano dioxide under stirring conditions Silicon is the water pressure-resistant freeze-thaw-resistant coating used for concrete structures.

Example Embodiment

[0031] Example 2

[0032] 1) Weigh polyvinyl alcohol and styrene polymer microspheres with amine salt ions and phosphoric acid groups to dissolve in xylene, add melamine isocyanamide, stir and reflux in a water bath at 70°C for 1 hour, after the reaction is complete , And then add trimethylpentyltriethoxysilane and siloxanyl organosilicon to the above solution and continue to stir and reflux, after the reaction, the temperature is reduced to room temperature;

[0033] 2) Add silicone resin emulsion, acrylic emulsion, hydrophobically modified copolymer ammonium salt dispersant, and butyl hydroquinone to the reaction solution obtained in step 2) and mix it uniformly, then add nano dioxide under stirring conditions Silicon is the water pressure-resistant freeze-thaw-resistant coating used for concrete structures.

Example Embodiment

[0034] Example 3

[0035] 1) Weigh polyvinyl alcohol and polymethyl methacrylate microspheres with amine salt ions and sulfate groups, dissolved in acetone, add isocyanate, stir and reflux in a water bath at 70°C for 1 hour. After the reaction is complete, Add trimethylpentyltriethoxysilane and siloxanyl organosilicon to the above solution and continue to stir and reflux, and the temperature is reduced to normal temperature after the reaction;

[0036] 2) Add silicone resin emulsion, acrylic emulsion, hydrophobically modified copolymer ammonium salt dispersant, and butyl hydroquinone to the reaction solution obtained in step 2) and mix it uniformly, then add nano dioxide under stirring conditions Silicon is the water pressure-resistant freeze-thaw-resistant coating used for concrete structures.

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PUM

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Abstract

The invention discloses a hydraulic-pressure-resistant and anti-freezing/thawing coating for a concrete structure and a preparation method of the hydraulic-pressure-resistant and anti-freezing/thawingcoating. The coating is prepared from components in parts by weight as follows: 20-30 parts of hydrophobic polymer microspheres, 20-35 parts of polyvinyl alcohol, 2-6 parts of a crosslinking agent, 5-12 parts of trimethylamyl triethoxysilane, 10-20 parts of siloxane organosilicone, 30-45 parts of a silicon resin emulsion, 30-50 parts of an acrylic emulsion, 1-5 parts of nano-silica, 3-10 parts ofa dispersant, 2-6 parts of an anti-aging agent and 5-10 parts of a diluent. The surfaces of the hydrophobic polymer microspheres are also immobilized with cationic groups and anionic groups. The prepared coating has good hydraulic pressure resistance, good freezing and thawing cycle resistance and high hydrophobic property, is not prone to falling off and is capable of withstanding air corrosionand environmental climate invasion for a long time, so that the service life is prolonged, and the coating is particularly applicable to concrete structures in projects such as water conservancy projects, port projects, roads and bridges in high cold and high altitude areas.

Description

technical field [0001] The invention relates to the field of concrete surface protective coatings, in particular to a water pressure-resistant and anti-freeze-thaw coating for concrete structures and a preparation method thereof. Background technique [0002] Concrete is currently the most widely used man-made building structure material. With the rapid development of modern economy and science and technology, the scope of demand for concrete has been expanded to the construction of ports, highways, bridges, and municipal modernization projects. In general, concrete structures have good long-term performance with high durability. However, the service ability and time of concrete will be limited by various environmental conditions, and will deteriorate during service, and some will not even reach the expected life and be destroyed. Frost resistance is one of the most important indicators of concrete durability. In the alpine and high-altitude areas, the main cause of concr...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D133/00C09D129/04C09D7/61
CPCC08K2201/011C08L2205/03C09D133/00C09D183/04C09D7/61C08L33/00C08L29/04C08K3/36C08L83/04
Inventor 刘雪梅周晓鸿翁铃林
Owner CHONGQING JINHONG CONSTR ENG
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