Preparation method of phosphate esterification starch adhesive based formaldehyde-free building inner wall putty

Abstract

The invention discloses a preparation method of phosphate esterification starch adhesive based formaldehyde-free building inner wall putty. The method is characterized by comprising the following steps that a phosphate esterification starch adhesive is prepared: raw materials of disodium phosphate or/and sodium dihydrogen phosphate, starch, NaOH water solution and water are taken; esterification synthesis, esterification starch washing and esterification starch pasting are performed to prepare the phosphate esterification starch adhesive; then, an ingredient A and gypsum or white cement are mixed to prepare the phosphate esterification starch adhesive based formaldehyde-free building inner wall putty; the ingredient A is mainly prepared from the phosphate esterification starch adhesive, heavy calcium carbonate, carboxymethylcellulose and preservatives. By using the method provided by the invention, the prepared phosphate esterification starch adhesive based formaldehyde-free building inner wall putty does not contain formaldehyde; ecological and environment-friendly effects are achieved; the preparation process is completed under the low-temperature condition; the energy consumption is low; a good energy-saving and emission reduction effect is achieved; the raw material resources are wide; the comprehensive cost is low; the phosphate esterification starch adhesive based formaldehyde-free building inner wall putty can be widely applied to various building inner walls of residences, schools, hospitals and the like.

Description

technical field [0001] The invention belongs to the preparation of filling slurry, and relates to a method for preparing phosphated starch adhesive-based formaldehyde-free building interior wall putty. The preparation of phosphated starch adhesive-based formaldehyde-free building interior wall putty is green and environmentally friendly , no formaldehyde pollutants, high strength, good construction performance, simple production process, low overall cost, and can be widely used in various types of building interior walls. Background technique [0002] Putty is a material for smoothing and protecting the surface of the wall. It is an indispensable process before the paint is painted. It acts as a bond between the wall and the paint. It can firmly bond the wall and provide a good coating for the paint. base. Traditional building interior wall putty generally uses polyvinyl formal construction glue, formaldehyde-containing construction rubber powder, etc. Although it has high ...

AI Technical Summary

Problems solved by technology

At present, according to the requirements of construction putty on viscosity, strength and workability, there has been no report on starch phosphate modification, nor has there been any report on phosphated starch adhesive type construction interior wall putty.

In addition, unmodified starch adhesives prepared directly by alkali gelatinization or after high-temperature gelatinization have disadvantages such as high viscosity, bond strength to be improved, and poor construction performance.

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