Silicone emulsions, mould

Any substance used to prevent rubber sticking to itself or to the surface of a mould. The lubricant may be a dry powder such as soapstone or a liquid such as silicone emulsion. See Dusting Agent and Mould Release Agent. 

Many rubber compounds have a tendency to stick in the mould cavity after vulcanisation and require some type of mould release agent. The substances used are surface-active materials such as detergents, soaps, wetting agents, silicone emulsions, aqueous dispersions of talc, mica and fatty acids, applied by spray or brush. Alternatively, dry types based on polytetrafluoroethylene or polyethylene, usually carried in a solvent, can be aerosol applied. An alternative is the addition of an incompatible material to the rubber compound which will bleed to the rubber surface during vulcanisation. 

Silicone liquids and emulsions are successfully used for prolonged storage and mould protection of fruit and vegetables. They form an airproof colourless film on the surface, which hampers the growth of mould and puts off the expiiy date. It does not spoil the taste of the produce. 

Silicone polymeric materials are used in a variety of forms such as pure fluids, emulsions, solvent-based formulations, resins, elastomers and so on. They are formulated in numerous products for various applications involving different processes across many different industries. Some of these products where adhesion plays a major role are adhesives, coatings, encapsulants, hair conditioners. Pressure-sensitive adhesives, mould Release agents. Sealants, skin creams and so on. 

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