Water-based heat activated adhesive and preparation method thereof

Abstract

The invention discloses a water-based heat activated adhesive and a preparation method thereof, wherein the preparation method comprises the following steps: S1, putting 5-20 parts of ethylene-vinyl acetate emulsion into a first reaction kettle, and adjusting the pH value; S2, feeding 15-35 parts of waterborne polyurethane emulsion, 30-50 parts of acrylic emulsion and another 5-15 parts of acrylic emulsion to a second reaction kettle to agitate; S3, blending emulsion in the first reaction kettle and the second reaction kettle, adding 0-30 parts of water-based terpene phenolic resin emulsion or water-based resin emulsion, and 0.1-0.5 part of defoamer and leveling flatting agent; and filtering to obtain the final product after fully agitating. The water-based heat activated adhesive prepared by the preparation method of the water-based heat activated adhesive disclosed by the invention is uniform and stable, free of bad phenomena such as layering, demulsifying and the like, good in waterproof property, high in bonding strength at a high temperature, not easy to stick back at a low temperature, and beneficial to automatic production. Meanwhile, the pollution on the environment is small, and the life health and the safety of a constructor are effectively protected.

Description

technical field [0001] The invention relates to the field of adhesive preparation, in particular to a water-based heat-activated adhesive and a preparation method thereof. Background technique [0002] At present, the commonly used adhesives are mainly solvent-based, water-based and hot-melt. Among them, solvent-based adhesives contain volatile organic solvents such as benzene and toluene, and the toxicity and environmental pollution problems brought about during use will affect their output. Water-based adhesives are composed of 50% water, non-polluting and cheap, but they have the problems of high emulsion viscosity, which is not conducive to rapid construction, low bonding strength, narrow application range, and easy sticking back at room temperature, which is not conducive to high-speed automation Production, and need to stick release film, the cost is high. Hot-melt adhesives are coated in a molten state and bonded when cooled to a solid state, but their bonding stren...

AI Technical Summary

Problems solved by technology

Among them, solvent-based adhesives contain volatile organic solvents such as benzene and toluene, and the toxicity and environmental pollution problems brought about during use affect their output.

Water-based adhesives are composed of 50% water, non-polluting and cheap, but they have the problems of high emulsion viscosity, which is not conducive to rapid construction, low bonding strength, narrow application range, and easy sticking back at room temperature, which is not conducive to high-speed automation Production, and need to stick release film, the cost is high

Hot-melt adhesives are coated in a molten state, and then cooled to a solid state to complete the adhesion, but its bonding strength is low, and it is mainly used in occasions such as cloth that do not require high bonding strength.

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