Environment-friendly water-based release agent and preparation method thereof

Abstract

The invention provides an environment-friendly water-based release agent. The environment-friendly water-based release agent is prepared from the following raw materials: 15-17 wt% of natural wax; 0.1 to 2 wt% of polyethylene imine; 0.5 to 1 wt% of fatty alcohol-polyoxyethylene ether; 0.8 to 1.5 wt% of oleyl amine polyoxyethylene ether; 0.4 to 0.6 wt% of fatty alcohol polyoxyethylene ether phosphate ester; 1.4 to 2.2 wt% of polyethylene glycol mono-stearate; 0.2 to 0.4 wt% of a defoaming agent; 0.1 to 0.3 wt% of a preservative; and the balance of water. Compared with the prior art, the environment-friendly water-based release agent provided by the invention adopts components with specific contents, realizes better integral interaction, and is good in product demolding effect, high-temperature-resistant and free of pollution and residues. Experimental results show that the environment-friendly water-based release agent provided by the invention has relatively low viscosity, is convenient to use, can be directly sprayed, has extremely good stability, is not easy to demulsify, has temperature resistance of more than 180 DEG C and VOCs (Volatile Organic Compounds) of less than 1 ppm during use, is made of a pure water-based material, and is environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to the technical field of release agents, more specifically, relates to an environment-friendly water-based release agent and a preparation method thereof. Background technique [0002] The release agent is a type of isolation film applied between the product and the mold to prevent the formed composite product from sticking to the mold, so that the product can be easily released from the mold while ensuring the surface quality of the product and the mold. , generally used in the production of release paper, rubber product release, etc., among which the production of release paper is a new development and application in recent years. [0003] At present, the general requirements for release agents in the market are as follows: easy to use; safe and non-toxic to operate; uniform and smooth, good film-forming effect; high temperature resistance; environmental protection and pollution-free, etc. Require. At present, the release age...

AI Technical Summary

Problems solved by technology

[0003] At present, the general requirements for release agents in the market are as follows: easy to use; safe and non-toxic to operate; uniform and smooth, good film-forming effect; high temperature resistance; environmental protection and pollution-free, etc. Require

At present, the release agents on the market are mainly divided into polyvinyl alcohol, silicone oil, silicone grease, etc. The disadvantages are that there are many residues, it is not easy to secondary processing, and there is a certain damage to the mold, and the release agents on the market are generally solvents. Type release agent, it is easy to produce a large amount of volatile harmful substances during the preparation process, causing serious pollution to the ecological environment. Products produced using this type release agent may have solvent residues, and frequent contact with the human body will cause considerable harm

[0004] In the development of domestic release agents: the patent with the publication number CN108035185A discloses a water-based release agent for hot stamping and its preparation method. The release agent consists of the following components as the main raw material: hydroxyl-terminated polydimethylsiloxane alkane, potassium hydroxide solution, oxygen-containing polymethylsiloxane, acetate starch, paraffin, emulsifier, defoamer, preservative, deionized water, and its process formula is water-based formula; but its production temperature is high, the highest The temperature is 150°C, and this technical solution lacks the content about the adhesion of the release layer between the PET film and the release paper product in the production of release paper for the disclosed hot stamping water-based release agent. Usually, there is a release layer between the PET film and the release paper. This release layer is made of a release agent so that the release paper can be peeled off from the PET. The release layer is required to be completely attached to the PET. , can not be left on the peeling paper products, so the release agent is required to have excellent adhesion to the PET film, otherwise it will seriously affect the performance of the product

The patent with the publication number CN103351812A discloses a water-based release agent and its preparation method and a release paper prepared by using the water-based release agent. The release agent consists of the following components as main raw materials: organosilicon monomer, vinyl End-capping agent, alkyd resin, emulsifier, catalyst, deionized water, etc., the release agent is a water-based release agent; but its preparation process temperature is 95 ° C ~ 140 ° C, and its maximum preparation temperature has exceeded the main solvent. Boiling point, not conducive to stable production

The patent with the publication number CN109777289A discloses a high-temperature-resistant water-based release agent with ultra-low coating dry weight. The release agent consists of the following components as main raw materials: water-based acrylic resin emulsion, water-based polyurethane resin emulsion, water-based nitrocellulose Vegetable emulsion, water-based silicone resin emulsion, and solvent can be used in high-temperature (above 180°C) environments; however, the main dispersant used is an organic solvent, which will produce toxic volatile components during the preparation process, which is harmful to the environment and human body. At the same time, solvent-based release agents are prone to residue and mold damage during use, which is not conducive to mold cleaning and secondary processing

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