Pressure-sensitive adhesive and preparation method thereof

Abstract

The invention provides an optical acrylate pressure-sensitive adhesive and a preparation method thereof. The pressure-sensitive adhesive has a relatively low dielectric constant under the condition of 1kHz-1MHz, has the advantages of high peel strength, high transmittance and the like, and is wider in application prospect. The pressure-sensitive adhesive is formed by polymerizing one or more acrylate monomers and an oligomer under the action of a photoinitiator; each acrylate monomer is acrylic saturated alcohol ester or alkyl acrylic saturated alcohol ester; the weight ratio of the acrylate monomers is 10% or more, preferably 15% or more and more preferably20% or more; the molecular weight of the oligomer is20000 or more; and the oligomer is selected from one or more of an acrylic prepolymer, an epoxy prepolymer, an organosilicone prepolymer, a polyurethane prepolymer, a polyether prepolymer, a polyhydroxyl polyolefin oligomer, a polybutadiene prepolymer and a fluorine-modified prepolymer.

Description

technical field [0001] The invention relates to the field of optical display, in particular to an optical pressure-sensitive adhesive for bonding display devices and a preparation method thereof. Background technique [0002] With the wide application and rapid development of optical displays, the requirements for optical pressure-sensitive adhesives are getting higher and higher. Acrylic resin is one of the commonly used pressure-sensitive adhesives. It is widely used because of its many advantages: 1. High adhesion to transparent materials such as PET optical film or glass; 2. Colorless and transparent appearance and good weather resistance 3. No additives are required, and the formula is simple; 4. Pressure-sensitive adhesives that meet various performance requirements can be prepared by copolymerization and cross-linking. [0003] However, with the rapid development of electronic products, acrylic resin adhesives still have certain limitations. For example, in specific...

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Problems solved by technology

[0003] However, with the rapid development of electronic products, acrylic resin adhesives still have certain limitations

For example, in specific applications, adhesives are required to have a lower dielectric constant (usually Dk is required to be 2 to 3 at 1 kHz to 1 MHz), but traditional acrylic resins have double bonds and high dielectric constants, making it difficult to meet this requirement

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