Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic compound containing silicon
Patent
1999-03-02
2000-09-19
Howard, Jacqueline V.
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic compound containing silicon
508209, 508211, 508214, C10M16904
Patent
active
061212105
ABSTRACT:
Foamable, silicone oil compositions and methods of lubricating surfaces with such compositions. Compositions in accordance with the invention may be sprayed onto surfaces from aerosol canisters or other spray containers to form stable foams which do not run or drip, preferably for periods in excess of sixteen hours. A composition in accordance with the invention comprises an aqueous emulsion of a silicone oil. Oil-in-water emulsions of polysiloxanes, such as polydimethylsiloxane, having melting points no greater than about 32.degree. F. (0.degree. C.) are preferred. The composition further comprises a liquefiable gaseous propellant, preferably including a volatile liquid hydrocarbon or a mixture of volatile liquid hydrocarbons. The composition further comprises a solid, non-ionic lipophilic surfactant, preferably having an HLB value of about 3 to about 8, more preferably about 3.5 to about 6. Useful surfactants include fatty acid esters, fatty alcohol ethers and fatty acid amides. The high temperature stability of the composition may be improved by adding a high temperature foam stabilizer having a melting point greater than about 110.degree. F. (43.degree. C.). Preferred foam stabilizers include polar, linear saturated long chain fatty alcohols having twenty or more carbon atoms in the molecule.
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Howard Jacqueline V.
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