Silane paste protective agent and preparation method thereof

Abstract

The invention relates to a silane paste protective agent and a preparation method thereof. The silane paste protective agent comprises the following formula by the weight percentage: 65%-85% of a silane monomer, 3.0%-5.0% of an emulsifier, 0.5%-1.0% of a thickening agent, 1.0%-1.5% of an emulsifying stabilizer, 0.1%-1.0% of a buffering agent, and 10%-28% of deionized water; the silane monomer is a mixture obtained by mixing one or more alkyl alkoxy silanes in any proportion; the emulsifier is a combination of one or more of alkylphenol ethoxylates OP series, fatty alcohol-polyoxyethylene ether MOA series, peregal OS series, Tween series, high fatty alcohol sulfate esters, and sulfonate emulsifier series; the emulsion stabilizer is any one of Span series, polyethylene glycol monolaurates, polyethylene glycol stearates, and glyceryl stearates. The silane paste protective agent has the advantages of excellent permeability, waterproof and durability, long-term storage stability, rapid bead coagulation and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a silane paste protective agent used for waterproofing and anticorrosion of concrete surfaces and a preparation method thereof. Background technique [0002] The durability, safety and service life of concrete structures have always been the focus of people's research. In order to improve the durability, our country invests a lot of money in infrastructure corrosion every year for repair and reinforcement. The cause of corrosion is not only the extensive salt In addition to the environment, the coastline is very long, the roads and bridges in the north use a lot of deicing salt in winter, and there is a wide range of saline-alkali land environments (mostly oil, natural gas and mineral resource bases). In addition, the pollution and acid rain are also more advanced than other countries Serious, but the understanding of corrosion in our country is still insuf...

AI Technical Summary

Problems solved by technology

[0003] However, the active components of liquid silane products are easy to lose during the impregnation process on the concrete surface, and the contact time with the concrete surface is very short, so it is difficult to achieve effective penetration. To achieve a good effect, a large amount is usually required, which is easy to cause The economic cost rises and the materials are wasted, but the construction of silane can be made more convenient through the paste state, especially the construction of the bottom surface and the facade. The non-flowing characteristics of the thixotropic paste can ensure the maximum penetration of the active ingredients of silane

[0004] Chinese patent CN10136760A introduces a high-solid content silane paste and its preparation method. Its technological formula is to compound silanes with different functional groups and emulsify them under heating conditions to obtain a silane paste waterproofing agent. The emulsifier content in the formula is as high as 5%, the use of a large amount of emulsifier will inevitably affect the hydrophobicity and waterproof performance of the silane paste, and the preparation method needs to heat the material, resulting in high energy consumption

[0005] Chinese patent CN101746988A introduces a special silane paste protective agent for concrete and its preparation method. The silane paste waterproof and protective agent is obtained. In this preparation method, organic solvents such as naphthenes, aromatic hydrocarbons, petroleum ether and solvent oil are used, which makes the system flammable and explosive, causing environmental pollution, and also brings great benefits to construction applications. Hidden danger

[0006] Chinese patent CN1727432A introduces a paste-like silicone water repellent and its preparation method. The preparation method is to use low molecular weight polydimethylsiloxane oligomers with active reactive end groups, and first disperse them into a pre-emulsion. Then add a catalyst and undergo a polymerization reaction for 15 to 22 hours to obtain a paste-like silicone water repellent. The preparation method is complicated and the reaction time is long. and constructability are poor

[0007] Chinese patent CN101734943A introduces a kind of oil-repellent, water-repellent and air-permeable fluorine-containing silane protective paste and its preparation method. Organic solvents, emulsifiers and deionized water are used as raw materials, and a viscous paste is obtained by stirring and emulsifying. This paste has the characteristics of water and oil repellency, but the raw materials that provide surface hydrophobicity in this formula include low-molecular silane Polymers such as methyl phenyl hydrogen-containing silicone oil will lead to the shortcomings of the paste product, although the surface waterproof performance is good, but the permeability on the concrete substrate is poor, and the long-term durability is insufficient. Moreover, the solvent used in the preparation method will cause Environmental pollution does not meet the requirements of environmental protection

However, this preparation method needs to heat the material, which consumes a lot of energy, and does not mention the storage stability of the prepared paste

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