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Production method of reactive organosilicon waterproofing agent

A production method and organosilicon technology, applied in the fields of chemistry and material science, can solve the problems of short validity period, poor effect, poor product stability, etc., and achieve the effects of simple and easy operation, easy availability of raw materials, and low cost of raw materials

Inactive Publication Date: 2015-12-02
日照东润有机硅股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Methyl silicate has good water solubility and low cost of use, but methyl silicate is easy to lose with water, has a short validity period, and is a strong alkaline corrosive material that pollutes the environment
Emulsion-type waterproofing agents are often prepared by emulsifying silicone linear polymers: methyl silicone oil, hydroxy silicone oil, hydrogen-containing silicone oil, etc. These products have few active functional groups, and it is difficult to form effective covalent bonds with the substrate after use, resulting in the expiration date of such products. Short, the use of external additives in concrete, gypsum, various boards and other materials will affect the strength of the material and the effect is poor; at the same time, the product obtained by the emulsification method has poor stability and is easy to delaminate and lose its usability
In order to improve the above-mentioned shortcomings of this type of product, the product obtained by the silane dispersion method is good in use, but the cost is high and the stability is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 A kind of production method of reactive silicone water repellent

[0031] Add 1.5 parts of op-10, 2 parts of SDBS and 50 parts of deionized water into the reactor, and stir at 50°C for 20 minutes to obtain an emulsifier-water mixed system; use acetic acid to adjust the pH of the emulsifier-water mixed system to 5; 25 parts of methyltriethoxysilane were continuously added dropwise into the above reactor within 40 minutes, then 10 parts of DMC was added at a time, and then stirred and polymerized at 50°C for 60 minutes to obtain a milky white emulsion with blue light.

Embodiment 2

[0032] Embodiment 2 A kind of production method of reactive silicone water repellent

[0033] Add 1.9 parts of AEO-9, 2.2 parts of SDBS and 50 parts of deionized water into the reactor, stir at 70°C for 30 minutes to obtain an emulsifier-water mixed system, and adjust the pH of the emulsifier-water mixed system to 4 with hydrochloric acid. A mixture of 40 parts of methyltrimethoxysilane and 8 parts of DMC was continuously added dropwise into the above reactor within 50 minutes, and then stirred and polymerized at 70° C. for 120 minutes to obtain a milky white emulsion with blue light.

Embodiment 3

[0034] Embodiment 3 A kind of production method of reactive silicone water repellent

[0035] Add 1.2 parts of op-10, 2.5 parts of SDBS and 55 parts of deionized water into the reactor, stir at 75°C for 60 minutes to obtain an emulsifier-water mixed system, and use dodecylbenzenesulfonic acid to make the emulsifier-water mixed system The pH was adjusted to 1. 60 parts of propyltriethoxysilane and 10 parts of D 4 The mixture was continuously added dropwise into the above reactor within 60 minutes, and then stirred and polymerized at a constant temperature of 75°C for 60 minutes to obtain a milky white emulsion with blue light.

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PUM

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Abstract

The invention discloses a production method of a reactive organosilicon waterproofing agent, which comprises the following steps: 1) adding a certain amount of deionized water into a mixture containing a nonionic emulsifier and an anionic emulsifier, and stirring at 50-95 DEG C for 20-60 minutes to obtain an emulsifier-water mixture system; 2) regulating the pH value of the emulsifier-water mixture system in the step 1) to greater than or equal to 1 and smaller than 7 or greater than 7 and smaller than or equal to 14 with a pH regulator; 3) proportionally adding an organosilicon ring body and alkoxy silane or mixture thereof into the emulsifier-water mixture system in the step 2); and 4) after finishing charging, stirring for polymerization at 50-95 DEG C for 30-480 minutes. The method has the advantages of cheap and accessible raw materials, and is simple to operate, easy to implement and convenient for property regulation. The prepared product has the advantages of uniform dispersion, favorable stability, favorable weather resistance, high adhesion, favorable washing fastness, energy saving, environment friendliness, favorable reproducibility and the like.

Description

technical field [0001] The invention belongs to the fields of chemistry and material science, and in particular relates to a production method of a reactive silicone waterproofing agent. Background technique [0002] Silicone is non-toxic, harmless and has excellent high and low temperature resistance and hydrophobic properties. It has the best effect among many waterproof materials for building materials. In the early stage, silicone water repellent was solvent-based, which was expensive to use and polluted the environment. With the development of science and technology, it is replaced by low-cost and pollution-free water-based products at this stage. [0003] At present, there are two types of water-based products on the market: methyl silicate and emulsion. Methyl silicate has good water solubility and low cost of use, but methyl silicate is easy to lose with water, has a short validity period, and is a strong alkaline corrosive material that pollutes the environment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D183/04C09D183/08C09D183/07C08G77/14C08G77/20C08G77/26C08G77/24
Inventor 高风杨萍潘兵
Owner 日照东润有机硅股份有限公司
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