This invention relates to sealing compositions and, more particularly, sealing compositions for use in conjunction with tail seals of tunnelling machines. In particular a sealing composition according to the invention comprises, by mass, from 10 to 55% of a petroleum-derived wax, or wax-consistency hydrogenated vegetable oil or fat, or a polyisoobutane of oil, grease or wax consistency, or any combination of the above, from 0.5 to 15% of a lipophilic emulsifier, and water in sufficient concentration (at least 20% preferably 20-75%) to inhibit combustion of the composition.
A drilling fluid additive for use during drilling and excavating applications, the additive comprises a mixture of an oil, an ester alcohol, nonionic surfactant and polypropylene glycol; and a method for manufacturing a drilling fluid additive comprising the step of admixing an oil, an ester alcohol, a nonionic surfactant, and a polypropylene glycol.
The present invention is a replacement for petroleum jelly as a base for products suitable for application to the skin. It is comprised of vegetable oil and silica. The vegetable oil is preferably a canola oil and more preferably a high oleic acid/low linolenic acid canola oil. The silica is preferably untreated fumed silica powder. The vegetable oil is preferably present in the range of 50-90% and most preferably 80%. The silica is present in the range of 5-15% and most preferably 10%. Other ingredients which may be added include vitamin E, margarine or butter, starch, and sunscreen. The base of the present invention has a significantly higher melting temperature than petroleum jelly.
