Low-viscosity high-solid-content acrylic acid pressure-sensitive adhesive and preparation method thereof

Abstract

The invention provides a low-viscosity high-solid-content acrylic acid pressure-sensitive adhesive and a preparation method thereof. The low-viscosity high-solid-content acrylic acid pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 120-150 parts of butyl acrylate, 80-100 parts of 2-ethylhexyl acrylate, 150-170 parts of ethyl acrylate, 85-100 parts of styrene, 95-115 parts of methyl methacrylate, 55-80 parts of acrylic acid, 8-15 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 8-12 parts of polyoxyethylene alkylphenol ether, 2-3 parts ofbenzoyl peroxide, 3-6 parts of dilauroyl peroxide, 8-15 parts of a buffer agent, 2-3 parts of n-octyl mercaptan, 3-6 parts of tert-octyl mercaptan and a proper amount of distilled water. According tothe low-viscosity high-solid-content acrylic acid pressure-sensitive adhesive and the preparation method thereof, the operation is safe, the product cost is low, the solid content of the prepared acrylic acid pressure-sensitive adhesive is increased to 60% or above, the viscosity is lower than 400 mPa.s, and the drying speed is high.

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive adhesives, in particular to an acrylic pressure-sensitive adhesive with low viscosity and high solid content and a preparation method thereof. Background technique [0002] Acrylic emulsion pressure-sensitive adhesive is a copolymer of acrylic acid (ester), a water-based adhesive that is copolymerized by acrylate and methacrylate, or by adding other monomers such as vinyl acetate. Among them, polyacrylate pressure-sensitive adhesives develop the most rapidly, mainly including emulsion type and solvent type. Widely used in labels, packaging tapes, double-sided tapes and medical tapes and other products. [0003] High solid content emulsion pressure sensitive adhesive can improve the utilization rate of production equipment, reduce transportation and storage costs, speed up the drying speed of latex, and achieve the required thickness of the product with less gluing process. But when th...

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Problems solved by technology

But when the solid content of the polymer emulsion exceeds 50%, the viscosity begins to rise sharply with the increase of the solid content, and the increase of the viscosity makes the mixing and heat transfer of the polymerization system a problem. Therefore, while synthesizing high solid content, the viscosity should not be too high. The synthesis is difficult, so it is very meaningful to develop a low-viscosity high-solid content acrylic pressure-sensitive adhesive and its preparation method