Products Manufactured from Silicone Oils

Aqueous silicone oil emulsions can be produced from silicone oils, as well as polymethylhydrogensiloxttnes with trimethylsiloxy-end groups, in the viscosity range tiround 1000 mPa s in emulsifying equipment (e.g. baffle-ring pumps), preferably using nonionic emulsifiers. The amounts of silicone oil in these emulsions vary between 3 

If polydimethylsiloxane oils are emulsified together with fine particulate solids, e.g. fumed silicas, very effective defoaming agents are obtained for aqueous media e.g. for the production of aqueous organic polymer dispersions and for dyeing processes in the textile industry. 

Silicone oils can be converted into pastes by incorporating large quantities of highly dispersed silicas or calcium or lithium soaps. These products are utilized as sealants and specialty greases. 

Silicone pastes and greases are produced by the incorporation ol highly dispersed silica or Ca- or Li-soaps In silicone oils 

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The largest volume of grease in use is made from petroleum products produced from naphthenic, paraffinic, blended, hydrocracked, hydrogenated, and solvent-refined stocks. In addition to petroleum oils, other lubricating fluids, such as esters, diesters, silicones, polyethers, and synthetic hydrocarbons, are also used. Of the synthetic fluids used in grease manufacture, the most common type is poly(alpha)olefin (PAO). 

Miscellaneous silicone products. Most of the major silicone manufacturers sell over 100 different silicone products, and the applications of these cover a very wide range. Here there is space to mention only two more applications the first being the use of silicone oils and emulsions for the prevention of foam in numerous industrial processes, the other being the use of silicone-containing copolymers as surfactants in the manufacture of polyurethane foams from di-isocyanates, ethylene/propy-lene polyethers and a little water. Unless a suitable surface-active surfactant is added, polyurethane foams tend to collapse before the polymerization is complete. One of the best types of surfactant is a poly-siloxane to which polyethers are attached ... 

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