A kind of anti-yellowing water-based adhesive and preparation method thereof

Abstract

The invention discloses an anti-yellowing water-based adhesive and a preparation method thereof. The anti-yellowing water-based adhesive is made of the following raw materials in parts by weight: 38-48 parts of polyvinyl alcohol, water-soluble polyvinyl formal 23-29 parts, 28-35 parts of water-based ethylene-vinyl acetate copolymer, 12-16 parts of silicon acrylic emulsion, 2-4 parts of emulsifier, 3-6 parts of ultraviolet absorber, 2.5-4 parts of antioxidant; The UV absorber is a mixture of 2‑(2ˊ‑hydroxy‑5ˊ‑methylphenyl)benzotriazole and resorcinol monobenzoate. The present invention selects the composition of raw materials and optimizes the content of each raw material, which not only gives full play to their respective advantages, but also complements and promotes each other. The prepared anti-yellowing water-based adhesive has good yellowing resistance and high / low temperature resistance; 180°peel strength is high.

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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