Industry share: A water-based acrylic structure pressure sensitive adhesive 2

Introduction of water-based acrylic structure pressure-sensitive adhesive

This paper provides the introduction of a water-based acrylic structural adhesive, which is composed of a mixture of pretreatment liquid and seed liquid. The pretreatment liquid is emulsified by methyl acrylate monomer and modified monomer in a mixture of ice water and then emulsified again by adding methyl methacrylate, acrylic wax, vinyl acetate, vinylidene chloride, and crosslinked monomer. It can be gradually heated to 25°C before use to ensure rapid bonding after the reaction. The seed liquid was prepared by emulsifying the mixture of a methyl acrylate monomer and surface active monomer. The reaction temperature of the seed liquid should be controlled at 60°C and the reaction time should be ensured to be 25min.

Before use, the temperature should be gradually controlled to about 25°C. The alkyl carbon number of methyl acrylate was 3, and the modified monomer was linear organic polysiloxane. The organic polysiloxane contained alkenyl groups bonded with silicon, and the mass percentage of alkenyl groups in organic polysiloxane was 0.5%. Methyl methacrylate with an alkyl carbon number of 3; The crosslinked monomer was composed of glycidyl methacrylate, diacetone acrylamide, and diacyl fibril adipate.

The mass ratio of diacyl fibril adipate in the crosslinked monomer was 30%. The surface active monomers are composed of alkyl allyl polyoxyethylene phosphate and dialkyl -2- sulfosuccinate sodium. The mass percentage of alkyl allyl polyoxyethylene phosphate in the surface active monomers is 40%. The mass ratio of methyl acrylate, methyl methacrylate, acrylic wax, and organosiloxane is 1:3:6:1. The weight ratio of vinyl acetate, methyl methacrylate, acrylic wax, and vinylidene chloride was 11:3:6:1, and the mass ratio of organic polysiloxane to methyl acrylate monomer in the pretreatment solution was 1:0.7. The mass ratio of glycidyl methyl acrylate, diacetone acrylamide, and diacyl fibril adipate in the crosslinked monomer is 2:7:1, and the mass ratio of the crosslinked monomer to methyl methacrylate is 0.3:3; The mass ratio of surfactant monomer to methyl acrylate was 0.13:0.3.

Use of water-based acrylic structure PSAs

The total amount of methyl acrylate taken above is 1kg, the total weight of the water and ice water mixture is 16kg, and the rest is made by referring to the mass ratio. Appropriate adjustment of water content, so that the glue specific gravity in 1.06, the final produced water-based acrylic structural adhesive, referring to the GB18583-2008 standard, 25°C viscosity can be guaranteed at 75mPa. s; Sponge bonding comparison test: the material is completely broken; 0.2H bond strength can reach 1.12KN/M, after 0.5H bond strength can exceed 1.85KN/M, shear strength is 2.34MPa.