Interface agent and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly discloses an interface agent and a preparation method thereof. The interface agent is prepared from the following raw materials in parts by weight: polyvinyl acetate emulsion, a polyvinyl alcohol solution, deionized water, an antifoaming agent, diatomite, chitosan, carboxymethyl cellulose, lactic acid, acetic acid and vinylacetate-acrylic emulsion. The method has the advantage that the coagulation time of the mixed interface agent is prolonged at a high temperature; the preparation method comprises the following steps:weighing raw materials, dissolving chitosan in acetic acid, adding carboxymethyl cellulose, lactic acid and part of deionized water, and performing mixing and stirring to obtain a mixed solution; soaking the diatomite in part of deionized water, performing ultrasonic dispersion, and injecting the premixed solution to obtain a mixed solution; and stirring the mixed solution, a polyvinyl acetate emulsion, a polyvinyl alcohol solution, the remaining deionized water, a defoaming agent and a vinyl acetate-acrylic emulsion to obtain a finished product.

Description

technical field [0001] The application relates to the field of building materials, more specifically, it relates to an interface agent and a preparation method thereof. Background technique [0002] The interface agent is a kind of adhesive substance, which is mainly used to treat the surface of the object. It can be coated on the surface of concrete, terrazzo, cement, mortar, and water brush stone. The interface agent can consolidate the substrate and allow other substances to cover it. And the interface agent has excellent permeability, can fully infiltrate the surface of the base material of the wall, make the base layer dense through glue, improve the interface adhesion, improve the bonding strength between the mortar or putty and the wall surface, and prevent hollowing. [0003] After the existing interface agent is mixed, the effective use time of the interface agent after mixing needs to be limited according to the temperature. At a temperature of 5-30 ° C, the interf...

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Problems solved by technology

[0003] After the existing interface agent is mixed, the effective use time of the interface agent after mixing needs to be limited according to the temperature. At a temperature of 5-30 ° C, the interface agent is generally limited to use within 2 hours. When the temperature exceeds 30 ° C , the effective use time of the interface agent after mixing is shortened, and it is generally limited to use up within 1 hour; if the interfacial agent after stirring is allowed to stand for longer than the effective use time, the interface agent after mixing will easily form condensation

[0004] Due to the high temperature in summer in the south, it is often easy to exceed 30 degrees Celsius. At this time, when the interface agent is applied to the exterior wall of the building, due to the large construction area and long construction time, the standing time of the interface agent after mixing is likely to exceed the effective use time. , the interface agent after mixing is prone to coagulation, and the interface agent after mixing with condensation cannot be mixed with water again, resulting in waste of raw materials

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