Vinyl acetate-acrylate copolymer emulsion, its synthesis method and application

Abstract

The invention relates to a vinyl acetate-acrylate copolymer emulsion, which is prepared by adopting OP-10, SDBS, SVS, water, acrylic acid and a seed emulsion as the bottom water system, taking VAc, BA and AA as the monomer, employing ammonium persulfate as the oxidant, and using sodium bisulfite as the reducing agent. Specifically, the seed emulsion in the bottom water system is prepared by using SDBS, OP-10, AA, sodium carbonate and water as the base solution, adopting VAc, BA and AA as the monomer, employing SDBS, OP-10, sodium carbonate and water as the pre-emulsification system, taking ammonium persulfate as the oxidant, and adopting sodium bisulfite as the reducing agent. The emulsion provided in the invention has a solid content of 40%-45%, viscosity (in terms of a 4-cup application amount) of 20S-26S, bonding peel strength (N / 2.5cm) of 1.4-2.5, a surface tension force of 32-37 dyne, and a film contact angle of 25-29 degrees, thus being particularly suitable for application in dry paper-plastic or plastic-plastic composite adhesives. The preparation method of the vinyl acetate-acrylate copolymer emulsion has the characteristics of mild reaction conditions and safety reaction system, thus being conducive to factory mass production.

Description

technical field [0001] The invention relates to the field of polymer synthesis, in particular to the synthesis of copolymer emulsions, in particular to vinyl acetate-acrylate copolymer emulsions and their synthesis methods and applications. Background technique [0002] The laminating (filming) process is to apply the laminating adhesive (composite adhesive) on the film, and then cold press or heat and dry the plastic or paper prints and then pass through the plastic or paper prints. Hot pressing completes the compounding process; after the printed matter is laminated, there is an extra layer of thin and transparent plastic film, which makes the printed matter smoother and brighter, the color of the picture and text is more vivid, and the embossed laminated matter has a more three-dimensional effect At the same time, the mechanical strength, water and moisture resistance, antifouling, wear resistance, folding resistance, and chemical corrosion resistance of the printed matte...

AI Technical Summary

Problems solved by technology

Moreover, the use of a large amount of solvents also brings pollution and greatly increases the cost of the product.

When in use, it is used after diluting to a certain concentration (generally 20% solid content) with an organic diluent, so a large amount of organic solvents are volatilized and discharged during the lamination process, which is wasted and pollutes the environment; The main agent and curing agent can be used on the machine only after they are strictly measured, mixed and diluted with a solvent in a certain proportion. The preparation process is complicated and error-prone. Clean the remaining glue on the film machine rubber roller, glue tank, etc. with an organic solvent, otherwise the remaining glue will naturally solidify in the air and become invalid

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