Preparation method of flexible powdery putty for external wall

Abstract

The invention provides a method for preparing external-wall flexible powdered putty, which relates to the technical field of building materials. The method comprises the following steps of well mixing cement, dispersible latex powder, inorganic filler and water retaining agent and then adding in and well mixing antifoaming agent and hydrophobic agent. The flexible putty mainly comprises the following materials in weight percentage: 25 to 40 percent of common cement, 2 to 12 percent of dispersible latex powder, 48 to 72 percent of inorganic filler, 0.1 to 0.6 percent of antifoaming agent, 0.03 to 0.15 percent of water retaining agent and 0.05 to 0.3 percent of hydrophobic agent. The putty disclosed by the invention has the advantages of quick drying, easy polishing, construction convenience and the like, has the characteristics of good anti-cracking property, strong water resistance, high flexibility, good bonding strength, heat preservation, alkali return avoidance and other performance, is stable in performance, simple in production process, safe, friendly to environment and free from toxicity. In addition, as the putty is powdered, the putty is convenient to package and transport and simple to use, and can be suitable for manual batch scraping.

Description

technical field [0001] The invention relates to a preparation method of flexible powdery putty for exterior walls, which relates to the technical field of building materials, in particular to flexible powdery putty for building exterior walls. Background technique [0002] In my country, the use of architectural coatings to decorate the exterior walls of buildings has become more and more widespread. Putty is a supporting material in the process of painting architectural coatings. Its main function is to level the outer wall surface and act as a bond between the base layer of the wall surface and the coating film. At the same time, it can also prevent the wall surface from peeling, cracking, shedding etc. [0003] At present, there are many problems in the putty used on the exterior walls of buildings, such as easy cracking, pulverization, poor bonding strength and water resistance. Due to the quality problem of putty, after a period of use of the paint finish of many buil...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many problems with the putty used on the exterior walls of buildings, such as easy cracking, pulverization, poor bonding strength and water resistance, etc.

Due to the quality problem of putty, after a period of use of the paint finish of many buildings, the walls appear peeling, cracking, falling off, etc., which not only bring losses to the building, cause water seepage and other disadvantages, but also make the paint Lost its decorative function, seriously affecting the reputation of architectural coatings