Emulsion type acrylate pressure-sensitive adhesive capable of being repeatedly uncovered and pasted

Abstract

The invention discloses an emulsion type acrylate pressure-sensitive adhesive capable of being repeatedly uncovered and pasted, and particularly relates to the technical field of pressure-sensitive adhesives. The emulsion type acrylate pressure-sensitive adhesive comprises 20 to 40 parts of a nonionic emulsifier, 2 to 7 parts of an ionic emulsifier, 2 to 7 parts of ammonium persulfate, 700 to 900 parts of water, 550 to 750 parts of butyl acrylate, 60 to 80 parts of methyl methacrylate, 100 to 200 parts of acrylic acid-a-ethylhexyl ester, 20 to 40 parts of acrylic acid, 0.1 to 0.5 part of nano sepiolite, 1 to 5 parts of a silane coupling agent and 0.5 to 1.5 parts of isopropyl triisostearoyl titanate. According to the invention, the nano sepiolite is added and modified, and the nano sepiolite is relatively high in chemical activity and can be possibly bonded with the acrylate emulsion in a certain form, so that the defect of stickiness of a coating is overcome, and the bonding force of the acrylate emulsion can be improved; furthermore, the sizing thickness of the pressure-sensitive adhesive prepared by the method can be reduced.

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive adhesives, in particular to an emulsion-type acrylate pressure-sensitive adhesive that can be repeatedly peeled and pasted. Background technique [0002] Pressure-sensitive adhesive is a special kind of adhesive, once it is pasted or applied on the surface to be bonded, without solvent or heat, it can be glued by pressing gently with fingers or other tools. objects are firmly bonded. The pressure-sensitive adhesive performance of pressure-sensitive adhesives is its most fundamental performance, and it is also a distinctive sign that distinguishes it from other adhesives or adhesive products. In order to have such fast tack and elasticity against peeling stress, pressure-sensitive adhesives are usually made with long-chain polymers as the base material, adding tackifying resins and softeners. Generally speaking, the pressure-sensitive adhesive component should include a polymer whose g...

AI Technical Summary

Problems solved by technology

[0004] The prior art has the following deficiencies: the existing acrylate adhesives cannot well solve the contradiction between the softness and adhesion of the coating. Adhesion between them is easy to occur, causing the coating to be easily sticky, and the sizing thickness of the existing acrylic pressure-sensitive adhesive is relatively large, resulting in a high cost of use of the acrylic pressure-sensitive adhesive

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