Platinum catalytic system primer in humid environment and preparation method of platinum catalytic system primer in humid environment

Abstract

The invention discloses a platinum catalytic system primer in a humid environment. The platinum catalytic system primer comprises a primer, a cross-linking agent, a catalyst, an anchoring agent, a water remover and a solvent, wherein the water remover comprises a primary water remover and an auxiliary water remover. The water remover is one or more compounds capable of reacting with water at the normal temperature; the water remover comprises an organic water remover and an inorganic water remover. A preparation method of the primer comprises the following steps of preparing primer diluent, cross-linking agent diluent, catalyst diluent, anchoring agent diluent, water remover diluent in sequence and uniformly mixing the diluent with the solvent to prepare the platinum catalytic system primer in the humid environment; coating the platinum catalytic system primer on the surface of a base material; and finally, desolventizing and curing in an oven, thereby coating a pressure sensitive adhesive.

Description

technical field [0001] The invention relates to the field of pressure-sensitive adhesive products, in particular to a platinum catalyst system 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 are more widely used because of their excellent high and low temperature resistance, good electrical properties, excellent weather resistance and the ability to stick to surfaces with low surface free energy. [0003] Silicone pressure-sensitive adhesives are generally used on substrates, but silicone pressure-sensitive adhesives are difficult to effectively wet on the surface of ordinary substrates, so a layer of primer is pre-coated on the surface of the substrate. Coa...

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Problems solved by technology

However, substances that can react with water at room temperature generally produce acid-base substances that destroy the structure of the primer, or these substances themselves contain nitrogen, phosphorus, and halogen elements that are likely to cause catalyst poisoning in the platinum catalytic system; so this method Generally only suitable as a primer for a small number of organotin catalyst systems

[0006] In view of this, 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 chamber, but the low temperature and dehumidification on the one hand cause energy 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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