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Reactive organosilicon waterproofing agent as well as preparation method and application thereof

A reactive, organosilicon technology, applied in the fields of organosilicon chemistry and material science, to achieve the effects of simple and easy application method, stable storage, and simple and easy preparation method

Active Publication Date: 2015-04-22
湖北武大有机硅新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there is no report on the use of MDTQ resin and its modified products as basic raw materials for the preparation of waterproofing agents in the literature.

Method used

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  • Reactive organosilicon waterproofing agent as well as preparation method and application thereof
  • Reactive organosilicon waterproofing agent as well as preparation method and application thereof
  • Reactive organosilicon waterproofing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Prepare HSi(OR) by 296 grams of silanol direct method 3 Add the obtained by-products into the three-necked flask, raise the temperature to 50°C under magnetic stirring, and add 37.5 grams of deionized water dropwise according to the calculation of the by-product mixture under stirring. 325 grams of organochlorosilane, the temperature was kept at 50-70°C during the dropping process and the HCl produced by the reaction was absorbed with lye; Hours; then lower the temperature to below 40°C, add neutralizing agent sodium bicarbonate until the reaction system is neutral, filter out the solid with filter paper, then heat the filtrate to 100°C, remove low boiling substances under reduced pressure, and obtain the reaction type MDTQ Silicone resin (462 g), viscosity 23 cSt, yield 74.4%.

Embodiment 2

[0041] Weigh 297 grams of reactive MDTQ silicone resin, place it in a dry reactor with stirring function, add 453 grams of 60-90 petroleum ether under stirring conditions, and then add 16 grams of reactive polymethylsiloxane to modify sex 0.04 grams of dibutyltin diacetate and 30 grams of silane coupling agent, stirred evenly, and then packed in a sealed container under the protection of dry nitrogen. The waterproof agent has excellent waterproof performance, fast curing speed and good permeability.

Embodiment 3

[0043] Take by weighing 320 grams of reactive MDTQ silicone resin, place it in a dry reactor with stirring function, add 430 grams of 100 # Solvent oil, then add 21 grams of reactive polymethylsiloxane modified product 0.03 grams of stannous salt and 30 grams of high-temperature additives were stirred for 15 minutes, and finally 0.05 grams of dibutyltin dilaurate was added and stirred evenly, and then packed in a sealed container under the protection of dry nitrogen. The waterproof agent has excellent waterproof performance and permeability, and the curing speed is moderate.

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Abstract

The invention discloses a reactive organosilicon waterproofing agent as well as a preparation method and an application thereof. The method comprises the following steps: selecting reactive MDTQ silicon resin as a base raw material, matching methyl polysiloxane containing a reactive silicon functional group or a modifier or a room-temperature curing catalyst in an organic solvent, and preparing the reactive organosilicon waterproofing agent by compounding chemical and physical methods. The organosilicon waterproofing agent can be sprayed on a to-be-waterproofed base body for waterproofing or can be added to a to-be-waterproofed organic material, so as to form a waterproof material with an interpenetrating network structure or a hard / soft block by cross-linking and solidification in the base material. According to the method, the functional assistants such as a cross-linking agent, graphite, metal powder, color paste, an enhancer, a high-temperature resistant assistant, a mildew preventive and a corrosion inhibitor can be selected and added according to the special requirements of users on the waterproofing agent; a plurality of methods such as spraying, brushing, rolling or soaking can be adopted to construct when the organosilicon waterproofing agent is applied; and the organosilicon waterproofing agent is cured at a room temperature after being constructed.

Description

technical field [0001] The invention belongs to the field of organosilicon chemistry and material science, and relates to a reactive organosilicon waterproofing agent and its preparation method and application. Background technique [0002] Silicone water repellent has the advantages of excellent water resistance, weather resistance, air permeability, anti-fouling durability and anti-mold erosion, etc., and has been widely used in the surface protection of various concrete, stone, wood and other materials. The silicone waterproofing agent coated on the surface of the substrate can evenly penetrate into the micropores on the surface of the substrate to form a thin hydrophobic film, so as to achieve the purpose of waterproofing. [0003] So far, the types of silicone waterproofing agents on the market include: ①Sodium methyl silicate prepared from methyltrichlorosilane and sodium hydroxide has the advantages of large production volume and low price, but its water resistance is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12C04B41/49
Inventor 耿学辉张先亮廖俊张彦谦何运凡张柏平金龙彪王凤艳
Owner 湖北武大有机硅新材料股份有限公司
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