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US 4,780,108 AGranted
Method for increasing bulk density of fillers
AssigneeGeneral Electric Company
InventorJohn S. Razzano
Life of this patent
Estimating the term…
Abstract
There is provided a method for increasing the bulk density of low bulk density materials by intimately admixing a low bulk density material and an organic or organopolysiloxane liquid and thereafter removing substantially all of said organic or organopolysiloxane liquid, for example, by evaporation.
Claims10
A method for increasing the bulk density of fumed silica comprising:
- (A) adding to a suitable mixing vessel:
- (1) a low bulk density fumed silica, and
- (2) at least 60% by weight based on the weight of (1) of organopolysiloxane liquid effective for densifying said low bulk density material;
- (B) mixing said low bulk density material and said organopolysiloxane liquid for an amount of time effective to decrease the volume of said low bulk density material;
- and
- (C) removing substantially all of said organopolysiloxane liquid from said low bulk density material so as to provide a material substantially free of agglomerates and grit and having an increased bulk density.
3 more elements
A method for increasing the bulk density of fumed silica, comprising:
- (A) adding to a suitable mixing vessel:
- (1) 100 parts by weight fumed silica and
- (2) at least 60 parts by weight octamethylcyclotetrasiloxane;
- (B) mixing said fumed silica and said octamethylcyclotetrasiloxane for about one minute;
- and
- (C) evaporating substantially all of said octamethylcyclotetrasiloxane so as to provide fumed silica having an increased bulk density.
3 more elements
Dependencies are inferred from the claim text.