Production method of reactive organosilicon waterproofing agent

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. ...

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