Preparation method of emulsion type pressure-sensitive adhesive

Abstract

A preparation method of an emulsion type pressure-sensitive adhesive comprises, by weight, 60-65 parts of a soft monomer, 20-25 parts of iso-octyl acrylate, 10-15 parts of a hard monomer, 1-3 parts of acrylic acid, 100 parts of deionized water, 0.1-0.2 parts of dodecyl mercaptan, 0.4-0.5 parts of an initiator, 0.2-0.5 parts of sodium bicarbonate, 0.8-1.2 parts of an anionic emulsifier, 1.8-2.2 parts of a nonionic emulsifier, and a proper amount of ammonia water, wherein the soft monomer is selected from one or a mixture of two of butyl acrylate and ethyl acrylate; the hard monomer is selected from one or a mixture of more of vinyl acetate, styrene and methyl methacrylate; the anionic emulsifier is one or a combination of more of CO-436, k-12 and DB-45; and the nonionic emulsifier is one or a combination of two of OP-10 and TA300-70. The preparation method adopting a seed emulsion technology makes an emulsion have good stability, narrow particle size distribution and easy control property, and the pressure-sensitive adhesive obtained in the invention improves the initial adhesion and the peel strength under large permanent adhesion.

Description

(1) Technical field [0001] The invention relates to a preparation method of an emulsion type pressure-sensitive adhesive (2) Background technology [0002] Pressure sensitive adhesives are a class of adhesives that are sensitive to pressure. Pressure-sensitive adhesives and their products are favored by people because of their labor-saving methods of use. With the continuous improvement of polymerization technology and the emphasis on environmental protection products, pressure-sensitive adhesives are developing in the direction of low pollution, energy saving, and high performance. Therefore, the emulsion pressure-sensitive adhesive with water as the solvent has aroused great interest. [0003] Solvent-type acrylate pressure-sensitive adhesive tape or silicone resin-type pressure-sensitive adhesive tape will inevitably produce a large amount of volatilization of organic solvents during the production process, so it will cause serious pollution to the environment, and the p...

AI Technical Summary

Problems solved by technology

[0003] Solvent-type acrylate pressure-sensitive adhesive tape or silicone resin-type pressure-sensitive adhesive tape will inevitably produce a large amount of volatilization of organic solvents during the production process, so it will cause serious pollution to the environment, and the production cost is also higher than that of emulsion-type acrylate adhesive tape

[0004] Commercially available common emulsion polymerized pressure-sensitive adhesives have the following disadvantages: when the initial adhesion and peeling performance are good, the holding viscosity will be poor; when the holding viscosity is good, the initial adhesion and peeling strength will be poor

[0006] The patent number is ZL201110456235.8, titled "A Preparation Method of Pressure-Sensitive Adhesive", which discloses a preparation method of pressure-sensitive adhesive, but its solvent is an organic solvent such as ethyl acetate or butyl acetate, which will affect the environment. cause some pollution

[0007] Patent ZL201110403869.7, titled "Emulsion-type acrylate pressure-sensitive adhesive and its preparation method", discloses an emulsion-type acrylate pressure-sensitive adhesive and its preparation method. The copolymerization of monomers affects the stickiness of the adhesive to a certain extent