Degradable pressure-sensitive adhesive and preparation method thereof

Abstract

The invention discloses a degradable pressure-sensitive adhesive and a preparation method thereof. The degradable pressure-sensitive adhesive is prepared from the following components in part by weight: 90 to 140 parts of polyvinyl alcohol resin, 30 to 60 parts of 2-ethyl benzofuran, 12 to 18 parts of magnesium oxide, 16 to 20 parts of glycerol, 5 to 8 parts of stearic acid, 20 to 30 parts of filler and 160 to 500 parts of acetone. The preparation method comprises the following steps of: adding the polyvinyl alcohol resin, the 2-ethyl benzofuran and the stearic acid into the acetone at the temperature of between 50 and 90 DEG C and dissolving completely; adding the glycerol, the magnesium oxide and the filler; and mixing uniformly to obtain the degradable pressure-sensitive adhesive. The main component of the pressure-sensitive adhesive is the polyvinyl alcohol resin which can be biodegraded completely; the 2-ethyl benzofuran can enhance the viscosity of the polyvinyl alcohol resin; and in the presence of the magnesium oxide, the viscosity of the polyvinyl alcohol resin can be enhanced and biodegradation of the viscosity of the polyvinyl alcohol resin can be promoted. The pressure-sensitive adhesive maintains the viscosity, overcomes the defects in the aspect of environmental protection and is a degradable pressure-sensitive adhesive. In addition, the preparation process is simple and the cost is low.

Description

[0001] technical field [0002] The invention relates to a pressure-sensitive adhesive and a preparation method thereof. Background technique [0003] After 20 years of rapid development in the pressure-sensitive tape industry, both production, product range, and product competitiveness in the market are on the rise. The main products include: packaging tape, electrical insulation tape, surface protection tape, double-sided tape, masking tape, medical tape, anti-corrosion tape, label paper. [0004] The main varieties of pressure-sensitive adhesives produced in China are: acrylic pressure-sensitive adhesives, rubber-type pressure-sensitive adhesives and hot-melt pressure-sensitive adhesives. [0005] Pressure-sensitive adhesives are used in various fields of daily life. Different fields have different requirements for the performance of pressure-sensitive adhesives. Therefore, various modifications of pressure-sensitive adhesives are often required to make them suitable for...

AI Technical Summary

Problems solved by technology

Although the above types of pressure-sensitive adhesives have certain advantages and applications, they are not degradable and easily pollute the environment. Therefore, there is an urgent need for degradable pressure-sensitive adhesives to appear.