Adhesive for architectural materials and method for preparing same

Abstract

The invention provides an adhesive used by building materials, the adhesive is powder manufactured by adopting corn starch and solid sodium hydroxide as raw materials, and the mixture ratio of the corn starch to sodium hydroxide is (5-15):1. The preparation method of the adhesive comprises the steps as follows: the solid sodium hydroxide is crushed, and mixed with the corn starch while stirring, so as to become loose granules which are then cooled and crushed to form the finished product. The adhesive has the advantages of simple manufacturing process, lower cost, high viscosity and no pollution.

Description

Adhesive for building materials and preparation method thereof technical field The present invention relates to a cornstarch-based adhesive for use in construction materials; the invention also relates to a method for preparing the adhesive. Background technique Adhesives used in construction materials such as cement and lime calcium used to be based on polyvinyl alcohol (PVA) and redispersible latex powder. These two building material additives are petrochemical products, which are expensive, and the polyvinyl alcohol in them will release free alcohols after use, which is harmful to the environment and human health. For a period of time, adhesives prepared with corn starch as the main raw material have been widely used in the construction industry, and the amount of use is increasing. Because liquid adhesives have many inconveniences in packaging, storage, transportation and other links, they are gradually replaced by powder adhesives. The existing construction adhesiv...

AI Technical Summary

Problems solved by technology

The above-mentioned method for preparing powdery corn adhesive requires six or seven kinds of raw material components, and the technological process is relatively complicated. Therefore, it becomes a difficult problem to maintain the stability of product quality

At the same time, there are many defects and deficiencies: Heating is required, which consumes energy; a large amount of clean water needs to be used, and a large amount of sewage is discharged, which is easy to cause environmental pollution; in the final link, because there is still water in the colloid, the colloid is elastic, making crushing very difficult ; Many links in the production process will produce bad smell gas, which is not conducive to the health of operating workers

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