Bottom sizing agent for humid environment and preparation method of bottom sizing agent

Abstract

The invention discloses a bottom sizing agent for a humid environment. The bottom sizing agent comprises a bottom sizing agent, a crosslinking agent, a catalyst, a catalytic promoter, an anchoring agent, a moisture scavenger and a solvent. The preparation method of the bottom sizing agent comprises the following steps: sequentially preparing a bottom sizing agent diluent, a crosslinking agent diluent, a catalyst diluent, an anchoring agent diluent and a moisture scavenger diluent with the solvent evenly, so as to prepare the bottom sizing agent; coating the bottom sizing agent on the surface of a base material; and finally desolventizing and solidifying in a drying oven, so as to coat a pressure sensitive adhesive. Condensate water which is generated by solvent evaporation gradually reacts by adding substances which can react with water at a room temperature to an ordinary bottom sizing agent, but not destroy chemical components of the bottom sizing agent; the coating quality of bottom coating is ensured; a fire accident caused by energy consumption increase and electrostatic accumulation generated by cooling and dehumidifying a bottom coating room is avoided; the variety and amount of the moisture scavenger are changed; and the operational use time of the bottom sizing agent in the humid environment can be adjusted.

Description

Technical field [0001] The invention relates to the field of pressure-sensitive adhesive products, in particular to a primer used in a humid environment and a preparation method thereof. Background technique [0002] Pressure-sensitive adhesive products can exhibit viscosity without heating or using solvents, and are widely used in die cutting, electronics, medicine, optics, electroplating protection, and material processing. Among them, silicone pressure-sensitive adhesive products have excellent high and low temperature resistance, good electrical properties, excellent weather resistance, and the characteristics of being able to stick to surfaces with low surface free energy, so the scope and field of use have been expanded. [0003] Silicone pressure-sensitive adhesives are generally coated on the substrate for use, but the silicone pressure-sensitive adhesive is difficult to effectively wet the surface of ordinary substrates, so a layer of primer is pre-coated on the surface of...

AI Technical Summary

Problems solved by technology

When the primer is coated, due to the inevitability of solvent volatilization, the temperature of the coating head in the coating device is much lower than the ambient temperature, which causes the moisture in the air to condense on the coating head and enter into the In the trough containing the primer, as the coating continues, the water in the trough will continue to accumulate until the surface of the substrate appears intermittent without primer, which is very likely It is difficult to find effectively when the machine is turned on, so it often results in poor adhesion of silicone pressure-sensitive adhesive products produced in the subsequent process, resulting in unnecessary defective products, especially in humid environments. why

[0005] Silicone pressure-sensitive adhesive products factories generally improve the condensed water on the coating head to enter the trough containing the primer by cooling and dehumidifying in the primer room, but the low temperature and dehumidification on the one hand cause an increase in energy consumption. On the other hand, the dry primer room environment will also lead to the accumulation of static electricity in the primer station, which will cause fire accidents

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