Acrylic pressure sensitive adhesive will produce residual glue during use

Pressure-sensitive adhesive, also known as pressure-sensitive adhesive, is a kind of adhesive with pressure sensitivity, which refers to a little pressure that can be bonded with the adhesive, with the rapid development of the economy, the pressure-sensitive adhesive has been widely used in all walks of life, in some special construction, industrial fields, need high-temperature tape. At present, most of the high-temperature resistant adhesive on the market uses solvent-based silicone pressure-sensitive adhesive, which is obtained by the copolymerization of silicone rubber and MQ resin. In the coating-drying process, it will be further crosslinked. Its unique structure and strong silico-oxygen bond energy give silicone pressure-sensitive adhesive good heat resistance.

The acrylic pressure-sensitive adhesive has a wide range of adhesion, adjustable performance, and good weather resistance, accounting for about 80% of the pressure-sensitive adhesive industry dosage, but the acrylic pressure-sensitive adhesive is made of soft monomer synthesis, the glass transition temperature of monomer is low, will become soft and lose strength at high temperature, this structure is poor in heat resistance, limiting its application in the field of high-temperature resistance. In the prior art, it is disclosed that the cross-linking degree of soft and hard monomers, inorganic fillers, and modified compounds will improve the high-temperature resistance. However, the pressure-sensitive adhesive formed in this way has low initial viscosity and peeling force, and the problem of residual glue or ghost will be generated in the use process, and the application value is greatly reduced.

Currently available is a water-based acrylic pressure-sensitive adhesive consisting of the following raw materials: Acrylic monomer 65 ~ 95, functional monomer 2 ~ 6, internal crosslinking monomer 0.5 ~ 5, liquid epoxy resin 2 ~ 20, emulsifier 0.3 ~ 2, initiator 0 ~ 1, reducing agent 0 ~ 0, wetting agent 0 ~ 1, defoamer 0 ~ 0 5 parts, 100 parts deionized water; Described for butyl acrylate emulsifier- acrylic block polymers.