Release coatings are used to provide a non-stick surface for various products. Here are some details about release coatings, including their ingredients and materials:
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Can coatings: Can coatings are used to prevent chemical migration into food in quantities that endanger human health, resist aggressive food types, and protect the metal of the cans. Many different can coatings are commercially available, but most of them are based on a limited number of chemical functionalities. Coatings contain different additives, such as agents to increase surface slipping, abrasion and scratch resistance of can coatings, lubricants, anti-foaming agents, adhesives, scavengers for hydrochloric acids, and pigments. Coatings that are based on dispersions of polyolefins have recently entered the market.
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Pharmaceutical coatings: Pharmaceutical coatings are used to coat oral solid dosage forms, including particles, granules, and tablets. A thin coat of a polymer material is coated on the surface of the dosage form.
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Release Coat® 30: Release Coat® 30 is a lower solids, economical, one-component coating that provides superior release for a variety of "sticky" products such as hot asphalt.
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Powder coatings: Powder coatings contain no solvents and release little or no amount of volatile organic compounds (VOC) into the atmosphere. There are three main categories of powder coatings: thermosets, thermoplastics, and UV curable powder coatings. Chemical pre-treatments involve the use of phosphates or chromates in submersion or spray application. These often occur in multiple stages and consist of degreasing, etching, de-smutting, various rinses, and the final phosphating or chromating of the substrate and new nanotechnology chemical bonding. The pre-treatment process both cleans and improves bonding of the powder to the metal. Recently, additional processes have been developed that avoid the use of chromates, as these can be toxic to the environment. Titanium, zirconium, and silanes offer similar performance against corrosion and adhesion of the powder.
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Safety: The safety data sheet (SDS) will list the harmful ingredients in the coating powder. For most powders, significant exposure can result in health effects such as occupational asthma and skin irritation and sensitization. Hazardous substances in coating powders must be controlled in line with the Control of Substances Hazardous to Health (COSHH) .
