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

Introduction of water-based acrylic structural 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. Keep for spare, before use can be gradually heated up to 25C to ensure rapid bonding after reaction; The seed liquid was prepared by emulsifying the mixture of a methyl acrylate monomer and surfactant monomer.

The reaction temperature and reaction time of the seed liquid should be controlled at 63°C and 28min, and the temperature should be gradually controlled to about 25°C before use. The modified monomer was linear organic polysiloxane. The organic polysiloxane contained alkenyl groups bonded with silicon, and the mass percentage of alkenyl groups was 0.6%. The alkyl carbon number of methyl methacrylate is 3 and 4 of alkyl methacrylate; The crosslinked monomer was composed of glycidyl methacrylate, diacetone acrylamide, and diacylperone adipate, in which the mass of diacyl fibril adipate in the crosslinked monomer was 27%.

The surface active monomers consist of alkyl allyl polyoxyethylene phosphate (sodium) and dialkyl-2-sulfosuccinate (sodium) with a mass ratio of 1:4:6:1 for methyl acrylate, methyl methacrylate, acrylic wax, and organic polysiloxane. The weight ratio of vinyl acetate, methyl methacrylate, propylene wax, and vinylidene chloride, was 11:4:6:1. The mass ratio of organic polysiloxane to methyl acrylate monomer in the pretreatment solution was 1:0.7. The mass ratio of hydro glyceryl methacrylate, 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 0.3:4. The mass percentage of alkyl allyl polyoxyethylene sodium phosphate in surfactant monomer was 54%, and the mass ratio of surfactant monomer to methyl acrylate was 0.13:0.3.

The use of water-based acrylic adhesive

The total amount of methyl acrylate taken above is 1kg, the total weight of the water and ice water mixture is 17kg, and the rest is made by referring to the mass ratio. Among them, 0.7kg methyl acrylate was taken for the preparation of the pretreatment solution, 0.3kgo was taken for the preparation of the seed solution, and 0.3kgo was taken when the pretreatment solution and seed solution were mixed and quickly stirred evenly, and the mixed solution was used within 0.1H.

Adjust the water content properly, so that the specific gravity of the glue is 1.04, the final prepared water-based acrylic structural adhesive, according to the GB18583-2008 standard, 25 °C viscosity can be guaranteed at 150mPa. s; Sponge bonding comparison test: material completely destroyed; 0.2H bond strength can reach 1.13KN/M, after 0.5H bond strength can exceed 1.75KN/M, shear strength 2.3MPa.