Mold release agent and preparation method and application thereof

Abstract

The invention provides a mold release agent, which contains the following components: a silicon-hydrogen bond-containing polysiloxane compound, a cross-linking agent, a catalyst and a solvent, wherein the cross-linking agent is a silicon compound containing Si-OH groups and / or a silicon compound which can form the Si-OH groups through hydrolyzation. The mold release agent is a semi-permanent mold release agent, and has the advantages of rapid low-temperature solidification, less mold release agent transfer, less wax deposition, convenient construction, low cost and the like; the produced product has uniform openings; and the mold release agent particularly achieves major breakthrough in the field of producing polyurethane foam products. The invention also provides a method for preparing the mold release agent, and application of the mold release agent in producing polyurethane foam products, epoxy resin products, glass fiber reinforced epoxy resin products, rubber products, unsaturated polyester products and other polyurethane products.

Description

technical field [0001] The invention relates to a release agent, its preparation method and application. Background technique [0002] In the manufacture of polymer material products, the molding method is generally used, and the melt or solution material is injected into the mold, and after solidification and molding, it is taken out from the mold. To help remove the part from the mold, a mold release agent is typically pre-applied on the mold. Conventional mold release agents are predominantly of the sacrificial type, meaning that individual parts are consumed or otherwise completely exhausted after forming in the mold. Sacrificial release agents must be reapplied to the mold surface before each article is made. Unfortunately, the use of sacrificial release agents creates many problems: 1) As the release agent is used repeatedly, it accumulates on the surface of the mold to form deposits that obscure the detailed features of the mold, which can lead to The characteristi...

AI Technical Summary

Problems solved by technology

Unfortunately, the use of sacrificial release agents creates many problems: 1) As the release agent is used repeatedly, it accumulates on the surface of the mold to form deposits that obscure the detailed features of the mold, which can lead to The characteristic structure cannot be clearly printed on the surface of the polymer product, and the integrity of the product surface is damaged

2) Due to the existence of fouling, the mold needs to be cleaned regularly, resulting in an increase in manpower and material resources, and a reduction in production capacity; in addition, in the process of cleaning the mold, the mold will be damaged to varying degrees, reducing the service life of the mold

3) Since the sacrificial release agent will be transferred to the surface of the product, it will affect the subsequent processing of the product

4) Since the sacrificial release agent needs to be reapplied to the surface of the mold before each product is manufactured, the demand for the release agent will be greatly increased, and the emission of VOC (solvent in the release agent) will also be increased. As a result, production costs and environmental pressures increase

These release agents basically meet the curing requirements of polyurethane foam systems, but these release agents are sacrificial

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