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Self-crosslinked alkyl alkoxy silane impregnant

A technology of alkylalkoxysilane and impregnating agent, which is applied in the field of waterproof and anticorrosion of porous substrates. It can solve the problems of the reaction crosslinking process relying on external moisture, the pollution of initiators and terminators, and the decrease in effective utilization rate, etc., to achieve good Effect of waterproof effect, excellent waterproof performance, good permeability and breathing function

Active Publication Date: 2019-08-30
河南聚研材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation process is too complicated, the cost of raw materials is too high, and the initiators and terminators used in the reaction process are polluting.
Generally speaking, the existing silicone waterproofing agents are highly volatilized at high temperatures, and their reaction and crosslinking process is heavily dependent on external moisture. Using them in high-temperature and dry climates will cause a serious decline in effective utilization, resulting in poor waterproofing effect or use. volume increase

Method used

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  • Self-crosslinked alkyl alkoxy silane impregnant
  • Self-crosslinked alkyl alkoxy silane impregnant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A self-crosslinking alkyl alkoxysilane impregnating agent, its preparation steps are as follows:

[0029] (1) Add methyltriethoxysilane, deionized water and ethanol into the reaction kettle according to the molar ratio of 1:3:1, stir at room temperature for 5min, add 0.01mol / L HCl solution to adjust the pH value of the system When the temperature is about 4, raise the temperature to 40°C and continue to stir to hydrolyze methyltriethoxysilane for 5 hours. After the reaction is completed, add 0.01mol / L NaOH solution to adjust the pH value of the system to 6-8. Stir under reduced pressure for 120 min at °C to remove ethanol to obtain methylsilanol.

[0030] (2) Mix the above-prepared methylsilanol and methyltriethoxysilane uniformly at a mass ratio of 5:95 to obtain a silane impregnating agent containing 5% methylsilanol.

Embodiment 2

[0032] A self-crosslinking alkyl alkoxysilane impregnating agent, its preparation steps are as follows:

[0033] Add propyltriethoxysilane, deionized water and ethanol into the reaction kettle at a molar ratio of 1:3:2, stir at room temperature for 10 minutes, add 0.01mol / L HCl solution to adjust the pH of the system to about 5 , raise the temperature to 45°C and continue stirring to hydrolyze propyltriethoxysilane for 4.5h. After the reaction, add 0.01mol / L NaOH solution to adjust the pH value of the system to 6-8. Stir under reduced pressure for 100 min to remove ethanol to obtain propylsilanol.

[0034] The above-prepared propylsilanol and methyltriethoxysilane were uniformly mixed according to a mass ratio of 10:90 to obtain a silane impregnating agent containing 10% propylsilanol.

Embodiment 3

[0036]A self-crosslinking alkyl alkoxysilane impregnating agent, its preparation steps are as follows:

[0037] Add octyltriethoxysilane, deionized water and ethanol into the reaction kettle at a molar ratio of 1:3:3, stir at room temperature for 5 minutes, add 0.01mol / L NaOH solution to adjust the pH of the system to about 9 , raise the temperature to 50°C and continue stirring to hydrolyze octyltriethoxysilane for 4 hours. After the reaction, add 0.01mol / L HCl solution to adjust the pH value of the system to 6-8. Under the conditions of pressure 0.005MPa and temperature 50°C Stir under reduced pressure for 90 minutes to remove ethanol to obtain octylsilanol.

[0038] The above-prepared octylsilanol and propyltriethoxysilane were uniformly mixed according to a mass ratio of 15:85 to obtain a silane impregnating agent containing 15% octylsilanol.

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Abstract

The invention relates to the field of waterproofness and corrosion prevention of a porous base material and particularly discloses a self-crosslinked alkyl alkoxy silane impregnant. The silane impregnant is prepared from alkyl alkoxy silane and alkylsilanol, and a mass ratio of alkylsilanol to alkyl alkoxy silane is (5-50):(50-95). According to the silane impregnant, alkylsilanol is prepared fromalkyl alkoxy silane by hydrolysis. The silane impregnant has excellent waterproof performance, the crosslinking reaction of the silane impregnant is independent of external moisture, meanwhile, the silane impregnant has excellent permeability, breathing function, chloride ion erosion resistance and antifouling function, and besides, the silane impregnant is a colorless transparent liquid, so thatthe color of the surface of a concrete material is not changed after application of the silane impregnant.

Description

technical field [0001] The invention relates to the field of waterproof and anticorrosion of porous substrates, and specifically discloses a self-crosslinking alkyl alkoxysilane impregnating agent. Background technique [0002] With the development of society, there are more and more types of building materials, and the consumption is increasing. At the same time, economic losses and life and production safety problems caused by insufficient durability of building materials are also becoming more and more prominent. Surface protection of construction materials is an effective and cost-effective treatment. Among them, the main function of surface protection is to prevent water and harmful ions carried by water from entering the interior of building materials, and at the same time improve the UV aging resistance of materials. Organosilicon is an important concrete waterproof material. Because of its good hydrophobicity, weather resistance, high and low temperature resistance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/64C07F7/08
CPCC04B41/4938C04B41/64C07F7/0836C04B41/4922C04B41/4535
Inventor 樊思林赵柯黄正强梁国涛王晨阳石嘉陈梦琳杨艳娟
Owner 河南聚研材料科技有限公司
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