Safe and environment-friendly type natural stone waterproof alkali-resistant backing adhesive and preparation method thereof

Abstract

The invention relates to a safe and environment-friendly type natural stone waterproof alkali-resistant backing adhesive and a preparation method of the safe and environment-friendly type natural stone waterproof alkali-resistant backing adhesive. The backing adhesive comprises the following components by weight: 4-6 parts of liquid mixture and 4-6 parts of powder mixture, the liquid mixture comprises the following components by weight: 380-420 parts of acrylic emulsion, 95-105 parts of lithium silicate aqueous solution, 1-3 parts of sterilizing agent, 1-3 parts of defoaming agent, and 450-550 parts of water, the powder mixture comprises the following components by weight: 430-480 parts of kaolin, 280-320 parts of heavy calcium carbonate powder, 230-270 parts of snowflake white powder, 1-3 parts of water reducing agent, and 1-3 parts of cellulose; and the various components in the powder mixture are respectively added into the liquid mixture in the preparation process. Compared with the prior art, the lithium silicate aqueous solution and the acrylic emulsion are compounded, the kaolin, the heavy calcium carbonate powder and the snowflake white powder are used as powder materials, the prepared backing adhesive is high in bonding strength, water resistance and alkali resistance, the phenomena of efflorescence, saltpetering and water spotting of the natural stone are solved fundamentally, and the backing adhesive is safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of safe and environmentally friendly pigments and dyes, and relates to a safe and environmentally friendly natural stone waterproof and alkali-resistant back glue and a preparation method thereof. Background technique [0002] Natural stone refers to materials that are mined from natural rock mass and processed into blocks or plates. Natural stones commonly used in architectural decoration mainly include granite and marble. The decoration methods of natural stone are mainly dry hanging method and wet paste method. Among them, the dry-hanging method takes up a lot of space and is expensive, and is generally suitable for external walls or office business halls with large spaces; while the wet-pasting method is mainly used for interior decoration of various buildings, and there are two main problems: one is The bonding strength between the back glue used as the binder and the natural stone is insufficient, and...

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Problems solved by technology

Among them, the dry-hanging method takes up a lot of space and is expensive, and is generally suitable for external walls or office business halls with large spaces; while the wet-pasting method is mainly used for interior decoration of various buildings, and there are two main problems: one is The bonding strength between the back glue used as the adhesive and the natural stone is insufficient, and it is easy to produce hollowing; the second is easy to produce white blooms, causing discoloration of the stone and reducing the aesthetics

But this method has the following problems: 1. Treat the symptoms but not the root cause, and fail to fundamentally avoid the occurrence of the white bloom phenomenon, and it is only suitable for light-colored stone materials, which has poor versatility; 2. The white stone adhesive is based on white cement. Under the same conditions, the strength of white cement is weaker than that of gray cement. In addition, the back of the stone is relatively smooth, and the phenomenon of hollowing will inevitably occur. making it difficult to guarantee the actual effect of the method

[0004] At present, most of the stone adhesives on the market are two-component adhesives compounded by acrylic emulsion and ordinary cement. Because the cement itself is highly alkaline, it is difficult to fundamentally solve the efflorescence of natural stone. problems, reducing the application value of natural stone

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