Water-based adhesive, preparation method, adhesive tape and preparation method thereof

Abstract

The invention relates to a water-based adhesive, a preparation method, an adhesive tape and a preparation method thereof. The preparation method of the water-based adhesive comprises the following steps of: preparing pre-emulsified liquid, adding 2.5-9.5 parts of reactive emulsifying agent and 0.08-0.9 part of sodium bicarbonate into a pre-emulsifying kettle, mixing with 100-250 parts of deionized water, stirring uniformly, adding 2-30 parts of methacrylic acid or acrylic acid, 1-20 parts of hydroxymethyl acrylamide and ethylhexyl acrylate and the like, stirring uniformly, and adding 150-350 parts of deionized water, the reactive emulsifying agent and the sodium bicarbonate into a reaction kettle; rising the temperature to be 75-85 DEG C, and adding 1-5% of pre-emulsified liquid prepared in the step S1 and diluted liquid prepared by adding 0.3-6 parts of ammonium persulfate and 20-30 parts of deionized water; preserving heat for 10 minutes, starting to drip the pre-emulsified liquid prepared by the step S1 and the diluted liquid prepared by the remaining ammonium persulfate and 20-50 parts of deionized water, and dripping within 2-5 hours completely; preserving heat for 10-60 minutes, then eliminating, reducing the temperature to be below 45 DEG C, neutralizing, discharging, adding a defoaming agent and a sterilizing agent, finally filtering by a net and discharging.

Description

technical field [0001] The invention relates to a water-based adhesive, a preparation method, an adhesive tape and a preparation method of the adhesive tape. Background technique [0002] The PVC tapes currently used in the market are mainly coated with solvent-based or hot-melt adhesives. Among them, PVC tapes made of solvent-based adhesives often contain organic solvents such as toluene and ethyl acetate, which are low-toxic It is not environmentally friendly and costly; while hot-melt adhesives are made into PVC tapes, the hot-melt adhesive needs to be heated to 140°C-180°C to melt, and then coated with a special hot-melt adhesive coating machine. Unwinding at the construction site, winding after heating, complicated operation, and high cost; In addition, PVC tape made of a small amount of water-based acrylic emulsion in the market has poor bonding performance, especially for low surface energy quilts. The adhesion of the adhesive is worse, and it will swell when it enco...

AI Technical Summary

Problems solved by technology

[0002] The PVC tapes currently used in the market are mainly coated with solvent-based or hot-melt adhesives. Among them, PVC tapes made of solvent-based adhesives often contain organic solvents such as toluene and ethyl acetate, which are low-toxic It is not environmentally friendly and costly; while hot-melt adhesives are made into PVC tapes, the hot-melt adhesive needs to be heated to 140°C-180°C to melt, and then coated with a special hot-melt adhesive coating machine. Unwinding at the construction site, winding after heating, complicated operation, and high cost; In addition, PVC tape made of a small amount of water-based acrylic emulsion in the market has poor bonding performance, especially for low surface energy quilts. The adhesion of the adhesive is worse, and it will swell when it encounters water or the humidity of the use environment is high, resulting in a decrease in the adhesive force of the tape, and the tape is prone to fall off, so the use is very limited

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