Preparation method of peelable protecting film composition

Abstract

The invention discloses a preparation method of a peelable protecting film composition. The preparation method comprises the following procedures: (1) dewatering and drying the raw materials; (2) adding isophorone diisocyanate and the like into a first reaction kettle at the room temperature, so as to obtain a primary product; (3) adding dimethylolpropionic acid into the primary product, and carrying out reduced pressure distillation, so as to obtain a secondary product; (4) dispersing the secondary product into a second reaction kettle, and adding a diethylenetriamine water solution, so as to prepare an aliphatic waterborne polyurethane emulsion; (5) adding the silica sol and the aliphatic waterborne polyurethane emulsion into a third reaction kettle, so as to obtain a mixed emulsion for later use; (6) adding a proper amount of acrylic copolymer sylvite and the like into a fourth reaction kettle, so as to obtain a mixed base solution; and (7) adding the mixed emulsion into the mixed base solution, so as to obtain the peelable protecting film composition. The peelable protecting film composition prepared by virtue of the preparation method has relatively strong cohesion, good peelable property, relatively high film strength and relatively good safety and environmental protection property.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of a peelable protective film composition. Background technique [0002] In order to prevent the materials or semi-products exposed to the atmosphere from being polluted, corroded and damaged, and prolong their service life, they are usually coated with good protective and peelable coatings on their surfaces for effective and temporary maintenance. Archive protection. In this way, it can not only isolate the invasion of air, salt spray, and microorganisms from the outside to achieve anti-corrosion effect; but also achieve the effect of cleaning and decontamination by adsorbing pollutants. Compared with solvent-based protective coatings, water-based protective coatings are safer and more environmentally friendly, so they are widely used in the field of product packaging and decoration. However, the existing water-based protective coatings still have ...

AI Technical Summary

Problems solved by technology

However, the existing water-based protective coatings still have the disadvantages of low film strength, poor peelability and single protective performance.