Methyl acrylate pressure-sensitive adhesive for LCD polarizer and preparation method thereof

Abstract

The invention relates to a methyl acrylate pressure-sensitive adhesive for an LCD polarizer and a preparation method thereof, which belong to the technical field of tackiness agent. The pressure-sensitive adhesive comprises the following three materials with the quality shares: a. weight average molecular weight Mw is 100000-2000000, dispersion degree Mw / Mn is 4-20 acrylate copolymer 100 shares, b. coupling agent, c. cross linker 0-15 shares, the comonomer of prepared acrylate copolymer comprises two parts: 1. (methyl) acrylate monomer : 90%-99.5%, 2. functional monomer: 0.5%-10%, wherein the functional monomer is one or several of (methyl) acroleic acid and (methyl) acroleic acid hydroxy ethyl, (methyl) acroleic acid hydroxypropyl acrylate, itaconic acid, acrylamide, N-hydroxymethyl acrylamide and maleic anhydride. The methyl acrylate pressure-sensitive adhesive does not contain elasticizer or low-molecular-weight acrylate copolymer and the like, can reach the use requirement without cross linker under the condition that the requirement to sticking property is low, and the glue layer has better stress relaxation property, and pressure-sensitive adhesive initial adhesion and stripping strength are both extremely ideal.

Description

Technical field: [0001] The present invention relates to solvent-based acrylate pressure-sensitive adhesives. It belongs to the technical field of adhesives. Background technique: [0002] Acrylic pressure-sensitive adhesives can be used as packaging pressure-sensitive tapes, label pressure-sensitive adhesives, etc. In the field of liquid crystal display panels, it is widely used to bond glass panels and polarizers of liquid crystal displays due to its transparency and heat and humidity resistance. Specifically, in actual production and application, a layer of pressure-sensitive adhesive should be attached to one side of the polarizer, and an isolation film for protecting the pressure-sensitive adhesive should be attached. In this way, the isolation film is torn off to expose the pressure-sensitive adhesive, and the polarizer can be conveniently and firmly adhered to the glass panel of the liquid crystal display. Such polarizer pressure-sensitive adhesives for liquid crys...

AI Technical Summary

Problems solved by technology

[0007] However, since the monomer composition of the low molecular weight copolymer is not exactly the same as that of the high molecular weight copolymer, it will affect the compatibility of the system and deteriorate the performance of the adhesive layer.

In addition, it will also make it inconvenient to cut glue

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