Stable aqueous slurry suspensions
AssigneePPT Research, Inc.
InventorIrl E. Ward
Life of this patent
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Abstract
A slurry composition for use as a lubricant and/or a stable suspension medium to suspend inert organic or inorganic particles which is an aqueous or polar solvent carrier containing gel particles as a lubricating and suspending agent for inert organic or inorganic particles. The composition can contain inorganic salts to provide additional electrostatic repulsion.
Claims19
A method for the suspension of inert colloidal or non-colloidal abrasive or non-abrasive particles in an aqueous, semi aqueous or non-aqueous organic carrier medium which comprises producing suspending particles selected from the group consisting of stable gel particles, sol-gel and gelatinous precipitates so as to establish suspending particles to inert particles interference to settling of said inert particles in said carrier medium, said carrier medium comprising about 0.1 to 60% by weight of the suspending particles which differ from said inert particles and are selected from the group consisting of metal or semi-metal oxides, hydroxides, and oxide hydrates that form said suspending particle in said carrier medium at a pH of about 3 to 12, whereby particles are suspended as a result of at least one of different densities and electrostatic charges.
A suspension composition which comprises:
- A) a carrier medium;
- B) up to about 80% by weight of said carrier medium of particles selected from the group consisting of gelatinous particles, sol-gel and gel particles being formed from a member selected from the group consisting of metal or semi-metal oxides, hydroxides, and oxide hydrates, said carrier medium comprising;
- about 0 to 100% by weight water, and the remainder being an inert polar solvent.
Dependencies are inferred from the claim text.