Preparation method of marble adhesive

Abstract

The invention provides a preparation method of a marble adhesive which is a single-component marble adhesive; an addition mode of variable-temperature polymerization and slow dropwise addition of a monomer and an anionic emulsifier is adopted, and an initiator is supplemented in the middle stage of polymerization on the basis of variable-temperature polymerization. During use, adhesive preparationis not needed, so that time waste and material loss caused by adhesive preparation are reduced; with adopting of variable-temperature polymerization, temperature rise in the later period of polymerization can be avoided, the automatic acceleration phenomenon is overcome to a certain extent, the reaction is close to a constant-speed polymerization reaction, and a high-quality product with more concentrated molecular weight distribution can be obtained. According to the method, the concentration of free radicals in the later period of polymerization can be increased, polymerization is complete,meanwhile, the polymerization speed in the later period of polymerization is increased, the polymerization period is obviously shortened, the initiator consumption is reduced, and the internal quality of the marble adhesive is improved.

Description

technical field [0001] The invention relates to the field of adhesives of organic polymer materials, in particular to a preparation method of marble adhesives. Background technique [0002] Natural stone has excellent performance and unique color and texture, and is widely used in industries such as home improvement and construction. However, my country's stone mining, processing and installation technology is not yet perfect, and stone often cracks or even breaks due to uneven force, resulting in low yield of stone and plate processing. During the installation of the board, due to its own weight and smooth surface, it is difficult to connect and fix it by ordinary physical methods, and the installation is more difficult. In order to solve such problems, the stone industry mostly uses marble adhesives to repair broken stone or install plates. However, the marble adhesives on the market have problems such as easy aging after curing, poor toughness, and substandard bonding s...

AI Technical Summary

Problems solved by technology

Although different production processes and usage ratios have been developed one after another, which has improved the quality of marble glue to a certain extent, but due to the high precision of glue compounding, the difficulty of synthesis, and the difficulty of converting it into industrial production, it has not been able to apply to it for a long time. Marketing

Existing marble adhesives are mainly synthesized from epoxy resin or unsaturated resin, and there are the following problems: the adhesive synthesized from low molecular weight epoxy resin has high crosslinking degree due to small molecular weight, high brittleness, and poor impact toughness; Although the molecular weight epoxy resin has good curing toughness, the colloid is solid, and a large amount of diluent needs to be added when using it, resulting in a greatly reduced bonding performance; the marble adhesive synthesized from unsaturated resin has low tensile strength and is suitable for smooth stone. Weak bonding ability, greatly affected by temperature during use, not suitable for stone or long-term bonding with other materials

Moreover, most of the existing marble adhesives are two-component adhesives, and the ingredients must be mixed according to a specific ratio. If the ratio of ingredients is not accurate, it will lead to a decrease in toughness and reduced bonding performance.