US 6,121,210 A · Foamable silicone oil compositions and methods of use thereof

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.

Claims53

Dependent claims

A foamable composition adapted for storage in a spray container having a valve associated therewith for dispensing the contents of said container in the form of a stable foam, said composition comprising:

a) a silicone oil;
b) a liquid propellant;
and
c) a foam builder comprising a solid, non-ionic lipophilic surfactant having an HLB value of about 3 to about 8.

1 more element

A foamable lubricant composition having a viscosity no greater than about 10.sup.4 cP, said composition being adapted to be dispensed through a valve of an aerosol canister in the form of a foam capable of maintaining a stable foam structure for a period of at least approximately 16 hours, said composition comprising:

a) a liquid propellant including a volatile liquid hydrocarbon;
b) an aqueous emulsion including at least about 50 wt %. based on a mass of said aqueous emulsion, of a polysiloxane having a melting point no greater than about 32.degree. F. (0.degree. C.), said emulsion being present in an amount of at least 85 wt % based on a partial weight of said composition excluding said liquid propellant;
c) a solid, non-ionic lipophilic surfactant having an HLB value of about 3 to about 8, said surfactant including a member selected from the group consisting of fatty alcohol ethers, fatty acid esters and fatty acid amides and being present in an amount of about 1 wt % to about 10 wt % based on said partial weight of said composition excluding said liquid propellant;
and
d) a high temperature foam stabilizer including a polar, linear saturated long chain fatty alcohol having twenty or more carbon atoms, said high temperature foam stabilizer having a melting point no less than about 101.degree. F. (43.degree. C.) and being present in an amount of about 0.25 wt % to about 10 wt % based on said partial weight of said composition excluding said liquid propellant.

2 more elements

Dependencies are inferred from the claim text.

Foamable silicone oil compositions and methods of use thereof

Life of this patent

Foamable silicone oil compositions and methods of use thereof

Life of this patent

Abstract

Claims53