Preparation method of efficient organic silicon emulsion water-proofing agent for reinforcing cement mortar concrete

Abstract

The invention relates to a preparation method of an efficient organic silicon emulsion water-proofing agent for reinforcing cement mortar concrete. The preparation method comprises the following steps: firstly adding octene and isopropanol in a three-necked flask, filling the flask with nitrogen, heating in water bath, reacting under a reflux condition, and depressurizing to steam out octyl triethoxysilane; adding methyl triethoxysilane and a dimethyl siloxane ring body in the three-necked flask, using a catalyst to balance the solution, performing hydrolysis on the solution, reacting to obtain a partial hydrolysis prepolymer of methyl silicone resin; at last, weighing octyl triethoxysilane and a methyl silicone resin prepolymer, adding a non-ionic surfactant alkyl alcohol polyoxyethylene ether, fully stirring the solution uniformly, adding water to emulsify the solution, and adding a buffer solution to obtain a waterproof emulsion; or, adding water in a emulsification kettle, adding the non-ionic surfactant and the buffer solution in the kettle, starting a high-speed shearing machine, slowly adding octyl triethoxysilane and the silicon resin prepolymer in the kettle, and emulsifying the substances to obtain the same waterproof emulsion. The efficient organic silicon emulsion water-proofing agent has the characteristics of high water seepage pressure resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of cement mortar overall reinforced waterproofing agent, and relates to a preparation method of cement mortar concrete reinforced high-efficiency silicone emulsion waterproofing agent. Background technique [0002] Cement products include cement mortar. During the molding and curing process of cement concrete, many capillary pores are formed due to the hydration of cement. They are easily permeated by water. Due to repeated thermal expansion and contraction, cement products crack. Atmospheric acid rain and seawater contain a large amount of corrosive gases such as sulfur dioxide, carbon dioxide and chloride ions, which penetrate into the capillary pores of cement products together with water, destroy the cement structure, corrode steel bars, greatly shorten the life of cement products, and some cause damage to houses. , Bridges and other buildings collapsed, causing unnecessary loss of people's lives and pro...

AI Technical Summary

Problems solved by technology

Because the waterproof layer is less than 2mm, it means that the waterproof reliability is insufficient, because the waterproof layer will be slowly worn away by external effects during long-term use

Such as Chinese patent application number 200410058200, US2008 / 0271643A just adopts water-reducing agent and fatty acid water-repellent agent to add in the concrete together, makes concrete whole waterproof, but waterproof effect is not good, aging resistance and resistance to microbial destruction are relatively poor; Chinese patents 03116917 and 01128085 use naphthalene-based water-reducers plus organic silicon and other additives to make the overall waterproof, but the overall water repellency of concrete is poor, because naphthalene-based water-reducers are too hydrophilic

Chinese patent 98124422, authorized announcement number CN1106363c is a patent applied by German Degussa company in China. The emulsion prepared by organosilicon compound and organosilicon modified surfactant is added to the concrete to make the whole waterproof, waterproof and waterproof. The permeability of sodium chloride has been significantly improved, but no change in the compressive strength of concrete

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