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US 6,015,777 AGranted
Silicone greases and methods for their production
AssigneeUniversity of Connecticut
InventorsRichard T. Lostritto, Jr., Joseph H. Groeger
Life of this patent
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Abstract
Low bleed silicone grease compositions are prepared by blending high viscosity silicone oils with filler materials and/or silicone elastomers. Greases comprise three main types: I) grease comprising high viscosity silicone oil and filler material, II) grease comprising high viscosity silicone oil and silicone elastomer, and III) grease comprising high molecular weight silicone oil and filler material and silicone elastomer.
Claims50
A grease composition comprising:
- at least one silicone oil exhibiting a viscosity of from about 5,000 cS to about 200,000 cS at 25.degree.;
- and
- at least one silicone elastomer gel comprising a cross-linked reaction product of an organo-alkenyl-polysiloxane compound having at least two silicon-bonded alkenyl radicals per molecule and an organo-hydrogen-polysiloxane compound having at least two silicon-bonded hydrogen atoms per molecule.
A grease composition comprising:
- at least one silicone oil exhibiting a viscosity of from about 5,000 cS to about 200,000 cS at 25.degree.;
- and
- at least one silicone elastomer gel comprising
- an organo-alkenyl-polysiloxane compound having at least two silicon-bonded alkenyl radicals per molecule;
- and
- an organo-hydrogen-polysiloxane compound having at least two silicon-bonded hydrogen atoms per molecule.
3 more elements
A grease composition comprising:
- at lease one silicone oil exhibiting a viscosity of from about 5,000 cS to about 200,000 cS at 25.degree.;
- and
- at least one silicone elastomer gel comprising a cross-linked reaction product of an organo-alkenyl-polysiloxane compound having at least two silicon-bonded alkenyl radicals per molecule and an organo-hydrogen-polysiloxane compound having at least two silicon-bonded hydrogen atoms per molecule;
- and
- at least one filler material.
2 more elements
A grease composition comprising:
- at least one silicone oil exhibiting a viscosity of from about 5,000 cS to about 200,000 cS at 25.degree.;
- and
- at least one silicone elastomer gel comprising
- an organo-alkenyl-polysiloxane compound having at least two silicon-bonded alkenyl radicals per molecule;
- and
- an organo-hydrogen-polysiloxane compound having at least two silicon-bonded hydrogen atoms per molecule;
- and
- at least one filler material.
5 more elements
Dependencies are inferred from the claim text.