Method for preparing putty powder excellent in cracking resistance

Abstract

The invention relates to a method for preparing putty powder excellent in cracking resistance. The putty powder is prepared from, by weight, 20-30 parts of white cement, 10-20 parts of calcium bicarbonate, 25-35 parts of talcum powder, 25-35 parts of ash calcium powder and 2-4 parts of adhesive powder. A preparation method of the adhesive powder includes steps: (1) main agent preparation, to be more specific, taking phenolic resin adhesives as a base material, adjusting a pH value to be neutral, heating to 50-60 DEG C, adding an appropriate amount of epoxy resin, keeping constant-temperature reaction for 5-15min, and cooling to the room temperature; (2) functional agent preparation, to be more specific, uniformly mixing an appropriate amount of propolis powder, water soluble glucan and an antioxidant, heating to 60-70 DEG C to form stable molten-state thick fluid, filtering particle impurities, and keeping for standby application; (3) adhesive powder finished product preparation, to be more specific, well mixing a main agent and a functional agent according to a proper proportion, and performing spray drying to obtain adhesive powder. The putty powder is reasonable in raw material selection and appropriate in compatibility and has advantages of excellent water resistance, bonding performances and antibacterial and anticorrosion performances as compared with existing putty powder.

Description

technical field [0001] The invention relates to a preparation method of a putty powder with excellent crack resistance. Background technique [0002] Putty powder is a building material that is used in large quantities in architectural decoration. Before painting the wall, putty powder must be used to prime the wall. Traditional putty powder mainly uses white cement and gray calcium powder as raw materials, and generates stable calcium carbonate by solidifying itself and absorbing carbon dioxide in the air. Therefore, the calcification reaction of gray calcium powder (calcium hydroxide) in traditional putty powder mainly occurs in the putty The surface layer of the powder coating, and there are a lot of unstable calcium oxide and calcium hydroxide in the inner layer of the coating, which leads to the following problems in the traditional putty powder coating: 1. Poor hardness: the calcification rate is not high, only the surface layer of the coating Relatively hard, low har...

AI Technical Summary

Problems solved by technology

Traditional putty powder mainly uses white cement and gray calcium powder as raw materials, and generates stable calcium carbonate by solidifying itself and absorbing carbon dioxide in the air. Therefore, the calcification reaction of gray calcium powder (calcium hydroxide) in traditional putty powder mainly occurs in the putty The surface layer of the powder coating, and there are a lot of unstable calcium oxide and calcium hydroxide in the inner layer of the coating, which leads to the following problems in the traditional putty powder coating: 1. Poor hardness: the calcification rate is not high, only the surface layer of the coating Relatively hard, low hardness of the inner layer; 2. Poor waterproof performance: the water outside the coating easily penetrates through the skin of the coating to the inner layer, making the coating soften and blister; 3. The adhesion is not strong: due to the inner layer of the coating The texture is soft, and the coating is easy to blister, crack and fall off after being exposed to moisture or heat

Images