Release agent, its preparation method and release paper prepared from the same

Abstract

The invention discloses a release agent, which comprises the following raw materials by weight part: 10-50 of fatty acid; 5-20 of a zirconium saline solution; and 30-70 of a polyvinyl alcohol aqueous solution. The invention also discloses a preparation method of the release agent, and the method comprises the following steps of: mixing the fatty acid, the zirconium saline solution and the polyvinyl alcohol aqueous solution uniformly, heating the mixture to 60DEG C-80DEG C, conducting heat preservation for 0.5h-1h, and cooling the mixture to room temperature, thus obtaining the release agent. The invention also discloses release paper, which is composed of release base paper and a ground coat as well as a release coat that are successively attached to one side of the release base paper surface. The release coat is formed by subjecting the release agent to coating and heat curing treatments. The release agent provided in the invention has cheap and easily available raw materials. The preparation method of the release agent is simple, and has small pollution to the environment. The release paper prepared from the release agent has a short heat curing time, so that the release agent is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of artificial leather processing and manufacturing, in particular to a release agent, a preparation method thereof, and a release paper prepared by using the release agent. Background technique [0002] Release paper, also known as release paper, is a special coated anti-adhesive paper, which can prevent prepreg from sticking and protect prepreg from contamination. [0003] Usually, during the manufacture of artificial leather (such as polyurethane synthetic leather and PVC artificial leather), release paper is used as a carrier and a temporary template. The release paper used in the production of artificial leather usually has a double-layer structure: The first layer is the release base paper as the substrate, and the second layer is the release coating. The general manufacturing method is to first coat a layer of primer on the release base paper to prevent the penetration of the release agent, and then coat the re...

AI Technical Summary

Problems solved by technology

[0008] (1) Organosilicone resin release agents use relatively expensive silicone and platinum catalysts as raw materials. During the production process, the curing of the release coating using this type of release agent requires a high temperature above 140°C. Strict equipment requirements lead to high production costs of release paper based on this type of release agent and lack of market competitiveness;

[0009] (2) The release paper produced with polyvinyl alcohol chromium salt as release agent has the risk of chromium pollution to the environment;

[0010] (3) The thermal curing speed of the release coating is slow with the release agent of amino alkyd resin, and the production efficiency is low, so it is not suitable for large-scale industrial production of release paper

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