Environment-friendly high-strength mildew-proof putty powder

Abstract

The invention provides environment-friendly high-strength mildew-proof putty powder comprising the following components in percentage by weight: 70-99% of heavy calcium carbonate, 0-30% of ash calcium, 0.5-10% of starch sodium octenylsuccinate, 0.2-5% of hydroxypropyl methylcellulose and 0.5-10% of modified starch, wherein the sum of the weight percentages of all the components is 100%. The putty powder is high in binding strength, greatly improved in mildew resistance and convenient in construction, and has the advantages of no powder falling, no scales, no cracks and no mildews.

Description

technical field [0001] The invention relates to a building material, in particular to a putty powder. Background technique [0002] The large white putty admixture used in traditional building decoration is mainly produced from polymer glue such as polyvinyl alcohol, carboxymethyl cellulose (CMC), carboxymethyl starch, and pregelatinized starch; but polyvinyl alcohol glue contains formaldehyde, It is harmful to the human body and does not meet the requirements of environmental protection. Although carboxymethyl starch and pregelatinized starch do not contain harmful substances, they have poor adhesion and mildew resistance, and there are still many disadvantages when added to putty powder: [0003] 1. Adding a large amount will easily cause the putty powder to become mildewed, causing the putty powder to fall off and be unsightly, resulting in huge waste. [0004] 2. The hardness of the putty powder is difficult to meet the requirements of the national standard, and the eff...

AI Technical Summary

Problems solved by technology

[0002] The large white putty admixtures used in traditional building decoration mainly use polymer glue such as polyvinyl alcohol, carboxymethyl cellulose (CMC), carboxymethyl starch, prepaste However, polyvinyl alcohol glue contains formaldehyde, which is harmful to the human body and does not meet environmental protection requirements. Although carboxymethyl starch and pregelatinized starch do not contain harmful substances, their adhesion and mildew resistance are poor. There are still many disadvantages when adding and using putty powder:

[0003]1. Adding a large amount will easily cause the putty powder to become mildewed, causing the putty powder to fall off and be unsightly, resulting in huge waste

[0004]2. The hardness of the putty powder is difficult to meet the requirements of the national standard, which leads to poor application effect of latex paint

[0005]3. Mildew is particularly serious in humid areas of my country (Jiangsu, Zhejiang, Shanghai, Hubei, Guangdong, Fujian, Sichuan, Chongqing, Hunan, Hainan, Guangxi, etc.), causing The renovation rate of the interior wall is particularly high. Generally, the interior wall will be renovated within 1-2 years, resulting in huge economic losses.

[0006]Because of the low price of carboxymethyl starch and pregelatinized starch, my country needs about 100,000 tons of carboxymethyl starch and pregelatinized starch for the putty powder industry every year , there is no particularly good substitute material at present, which limits the quality and development of my country's inner wall white putty, so a new type of putty material is needed, and the present invention is based on this