Method for modifying wet base surface of aluminum sulfate cement by using hydrophilic micromolecular epoxy composite resin

Abstract

The invention provides a method for modifying a wet base surface of aluminum sulfate cement by using hydrophilic micromolecular epoxy composite resin, which comprises the following steps: firstly, adding an epoxy monomer, a reducing agent and water into a reaction kettle provided with a stirrer and a condensing device, stirring at the speed of 350r / min, and heating in a water bath to 60-70 DEG C; then preparing a mixed solution from an amine modified monomer and an initiator, and dropwise adding the mixed solution into the reaction kettle for 1.5-2 hours; after dropwise adding the mixed solution, carrying out constant-temperature reaction for 1-2 hours, naturally cooling to room temperature, adding a neutralizer, and discharging to obtain waterborne epoxy resin; and adding the obtained water-borne epoxy resin and a polyether amine curing agent into a reaction kettle, uniformly stirring, standing and curing for 15-20 minutes to obtain an epoxy composite monomer, supplementing water until the total mass is 1000 parts to obtain an epoxy composite monomer aqueous solution, and coating a wet base surface with the epoxy composite monomer aqueous solution to improve the acting force between the concrete and the wet base surface. The preparation process is simple, the product performance is excellent, the stability is good, and the adaptability is wide.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for modifying a wet base surface of aluminum sulfate cement by using a hydrophilic small molecule epoxy composite resin. Background technique [0002] Epoxy resin coatings have good mechanical properties and durability, so they occupy an important position in the coatings industry. However, traditional solvent-based epoxy coatings contain a large amount of organic solvents, which will bring harm to the ecological environment and human beings. Therefore, water-based epoxy coatings are an inevitable trend in the development of epoxy coatings. [0003] Patent CN104478342A discloses a wet base surface base treatment agent, a wet base surface base treatment agent, which is composed of A component and B component, wherein, A and B components are made of the following raw materials in weight percentage, A group Parts: emulsified asphalt 50%~80%, modified emulsion 10...

AI Technical Summary

Problems solved by technology

[0006] Different from the above patents, the present invention provides a method for modifying the wet base surface of aluminum sulfate cement by using hydrophilic small molecule epoxy composite resin. The present invention uses epoxy resin as raw material, but traditional epoxy resin is an oil-soluble substance , is insoluble in water, so it needs to be equipped with a large amount of organic solvents when used, which has a great impact on the environment and ecology. Therefore, the present invention uses amine monomers to modify it to make it a water-based epoxy resin. Oxygen resin has good hydrophilic properties, and can be used as a solvent with water. When it is used between wet base surfaces, it has strong adhesion and can improve the interface properties of wet base surfaces.

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