Yellowing-resistant aqueous adhesive and preparation method thereof

Abstract

The invention discloses a yellowing-resistant aqueous adhesive and a preparation method thereof, wherein the yellowing-resistant aqueous adhesive is prepared from the following raw materials by weight: 38-48 parts of polyvinyl alcohol, 23-29 parts of aqueous polyvinyl formal, 28-35 parts of an aqueous ethylene-vinyl acetate copolymer, 12-16 parts of silicone-acrylic emulsion, 2-4 parts of an emulsifier, 3-6 parts of an ultraviolet ray absorber, and 2.5-4 parts of an antioxidant, wherein the ultraviolet ray absorber is a mixture of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole and resorcinol monobenzoate. According to the present invention, by selecting the raw materials and optimizing the ratio of the raw materials, the advantages of various raw materials are completely provided, and complement and promote each other, and the prepared yellowing-resistant aqueous adhesive has advantages of good yellowing resistance, good high / low temperature resistance and high 180 DEG peel strength.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a yellowing-resistant water-based adhesive and a preparation method thereof. Background technique [0002] With the development of industry, the application market of adhesives (glue, or adhesives) is becoming more and more extensive, and the varieties are also increasing. Commonly used adhesives mainly include solvent-based, water-based and hot-melt types. At present, the amount of solvent-based products is relatively large. It uses volatile organic compounds such as benzene and toluene as solvents. These solvents will directly volatilize into the atmosphere during use to pollute the environment and endanger the health of workers. Therefore, many foreign government departments Promulgation of laws and regulations to limit the use of volatile organic compounds, the transformation of adhesives from solvent-based to water-based has become inevitable. [0003] Water-based (based) adhesives...

AI Technical Summary

Problems solved by technology

[0006] 1. The existing adhesive (glue) is prone to change in the sun, and white and light colors will turn yellow. For example, the white shoe lining and upper (also called shoe upper) will turn yellow after a period of time, which seriously affects the appearance and quality of the product. The quality is not durable; when storing and transporting, it cannot be exposed to light and is not resistant to storage;

[0007] 2. The bonding performance is poor, and performance indicators such as 180°peel strength are low

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