Pressure sensitive adhesive composite with wide temperature applicable range and preparation method thereof

Abstract

The invention discloses a pressure sensitive adhesive composite with wide temperature applicable range and a preparation method thereof. The composite is prepared by mixing a component A and a component B in a weight ratio of 1:2 and then adjusting the solid content to 40%-50%, wherein the component A is composed of polyacrylate with the glass transition temperature of -20 to 30 DEG C, the polyacrylate comprises acrylate soft monomer, acrylate hard monomer, hydrazide crosslinking monomer, organic solvent, oil-soluble initiator and chain transfer agent; and the component B is composed of polyacrylate with the glass transition temperature of -50 to 70 DEG C, and the polyacrylate comprises acrylate soft monomer, acrylic acid functional monomer, acrylic acid crosslinking monomer, organic solvent, oil-soluble initiator and chain transfer agent. The adhesive composite which is prepared by mixing polyacrylate polymer A and B with two different glass transition temperatures, can adapt to the working conditions with higher temperature of 100-120 DEG C and lower temperature of -20 DEG, the peeling strength can not degrade, and the weather resistance can be kept good.

Description

technical field [0001] The invention belongs to the field of synthesis of polymer adhesives, in particular to a pressure-sensitive adhesive composition with a wide temperature application range and a preparation method thereof. Background technique [0002] The applicable temperature range of traditional solvent-based pressure-sensitive adhesives is mainly limited to room temperature. If the pressure-sensitive adhesive is used under high or low temperature conditions, the peel strength of the pressure-sensitive adhesive will attenuate significantly, resulting in poor adhesion. The high-temperature-resistant adhesive or low-temperature-resistant adhesive can be greatly improved to meet the use of high-temperature or low-temperature conditions, but its cost is high, and this high-temperature or low-temperature adhesive is It cannot be used in an environment with a wide temperature range. At present, there is no comprehensive adhesive that can expand slightly above room temper...

AI Technical Summary

Problems solved by technology

[0002] The applicable temperature range of traditional solvent-based pressure-sensitive adhesives is mainly limited to room temperature. If the pressure-sensitive adhesive is used under high or low temperature conditions, the peel strength of the pressure-sensitive adhesive will attenuate significantly, resulting in poor adhesion

The high-temperature-resistant adhesive or low-temperature-resistant adhesive can be greatly improved to meet the use of high-temperature or low-temperature conditions, but its cost is high, and this high-temperature or low-temperature adhesive is Unsuitable for use in environments with wide temperature variations

At present, there is no comprehensive adhesive that can expand slightly above room temperature and slightly below room temperature at the same time, so that a pressure-sensitive adhesive can be used in a wider temperature range, making it more applicable to the environment. widely