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US 4,898,898 AGranted
Polymer-densified fillers
AssigneeGeneral Electric Company
InventorsThomas H. Fitzgerald, John S. Razzano, Todd R. Stegman
Life of this patent
Estimating the term…
Abstract
A method for providing polymer-densified fillers consisting essentially of mixing 100 parts of a silicone polymer with 50 to 500 parts of reinforcing filler or 400 to 5000 parts of extending filler and mixing such blend for an amount of time effective for providing a dense, free-flowing particulate mixture.
Claims25
A method for providing polymer-densified fillers, consisting essentially of:
- (A) adding to a suitable mixing vessel;
- (i) 100 parts by weight of a silicone polymer or mixture of silicone polymers having a viscosity ranging from about 1000 to about 200,000,000 centipoise at 25.degree. C.;
- and
- (ii) an amount of filler comprising:
- (a) 50 to 500 parts by weight of reinforcing filler per 100 parts by weight of said silicone polymer;
- and
- (b) 900 to 5000 parts by weight of extending filler per 100 parts by weight of said silicone polymer;
- and
- (B) mixing said silicone polymer and said filler for an amount of time effective for providing a free-flowing particulate mixture having a density at least 100 percent higher than when the silicone polymer and filler first became free-flowing particles.
6 more elements
A method for adding filler to a base silicone composition comprising:
- (A) adding to a suitable mixing vessel:
- (i) 100 parts by weight of a silicone polymer or mixture of silicone polymers having a viscosity ranging from about 1000 to about 200,000,000 centipoise at 25.degree. C.;
- and
- (ii) an amount of filler comprising:
- (a) 50 to 500 parts by weight of reinforcing filler per 100 parts by weight of said silicone polymer;
- and
- (b) 900 to 5000 parts by weight of extending filler per 100 parts by weight of said silicone polymer;
- and
- (B) mixing said silicone polymer and said filler for an amount of time effective for providing a free-flowing particulate mixture having a density at least 100 percent higher than when the silicone polymer and filler first became free-flowing particles;
- (C) adding an effective amount of said free-flowing, polymer-densified filler to said base silicone composition;
- and
- (D) combining said polymer-densified filler and said base silicone composition by a suitable means.
9 more elements
Dependencies are inferred from the claim text.