Mold release capable of demoulding for plurality of times and preparation method thereof

Abstract

The invention provides a mold release capable of demoulding for a plurality of times, which comprises the following components: 1 to 3 parts by weight of vinyl silicone oil, 0.4 to 0.8 parts by weight of accelerator, 4 to 8 parts by weight of crosslinking agent, 1 to 3 parts by weight of flatting agent, 5 to 12 parts by weight of polyester resin and 70 to 85 parts by weight of diluent. The method for preparing the mold release comprises the following steps: (a), respectively pouring the vinyl silicone oil, polyester resin and diluent into a container, sealing the container and stirring the materials; (b), adding crosslinking agent and flatting agent, and keeping stirring the materials; and (c), finally, adding the accelerator, and stirring and mixing the materials uniformly. By adopting the preparation method provided by the invention, the prepared mold release has high film-forming property and is capable of demoulding for a plurality of times; the surfaces of the demoulded products are not damaged; the silicone oil is not transferred; the mold release has no influence to the post processing of the products and can be used for a long time. The mold release and preparation method provided by the invention are particularly suitable for demolding and releasing in the compression process of the polymer composite materials.

Description

technical field [0001] The invention relates to a release agent and a preparation method thereof, in particular to a release agent which can be used for multiple releases and a preparation method thereof. Background technique [0002] The release agent can prevent the material from sticking to the mold and avoid damage to the surface of the product. At present, the release agent is mainly two kinds of wax type and solvent type. The method of use is to coat a layer of release agent on the surface of the mold, and dry it at a certain temperature for a period of time to form a thin film on the surface of the mold, so that the product can be released from the mold smoothly. [0003] However, whether it is a waxy release agent or a solvent-based release agent on the market, there are the following problems: [0004] (1) Too few demoulding times. The main reason is that most release agents contain silicone oil. Some silicone oils are not resistant to solvents, which destroys t...

AI Technical Summary

Problems solved by technology

Some silicone oils are not resistant to solvents, which destroys the structure of the film and reduces the number of demolding

Moreover, silicone oil will migrate to the surface of the product, which will seriously affect the post-processing of the product;

[0005] (2) At present, most resin release agents are composed of two components. Once the components are mixed, they must be used within the specified time.

It is easy to cause waste if it is not used up