Back to results
US 5,998,542 AGranted
Processing of an elastomer dispersion
AssigneeGeneral Electric Company
InventorsAdam J. Horne, Donald S. Johnson, John A. Kilgour, Richard D. Wang
Life of this patent
Estimating the term…
Abstract
A composition comprising the hydrosilylation addition product of a linear alkenyl functionalized polyorganosiloxane and an M.sup.H Q resin and a low molecular weight silicone when subjected to a new particle size reduction process that includes flow induced shearing provides for components in personal care formulations that have improved spreadability and substance as a consequence of a unique particle size distribution.
Claims12
A process comprising:
- a) subjecting a dispersion of a silicone elastomer gel in a solvent to a pressure above 500 psi, said elastomer having an initial average participle size and a particle size distribution;
- b) subjecting said dispersion to a pressure drop through an orifice, whereby said dispersion passes through said orifice, wherein the initial average particle size of said dispersion is reduced;
- and
- c) repeating steps a) and b), whereby said particle size distribution is controlled and comprises;
- d) a local maximum ranging from about 21 to about 26 microns;
- e) a local maximum ranging from about 33 to about 38 microns;
- and
- f) a local maximum ranging from about 50 to 60 microns.
5 more elements
A process comprising:
- a) subjecting a dispersion of a silicone elastomer gel in a solvent to a pressure drop using an orifice, said elastomer having an initial average particle size and a particle size distribution, whereby said dispersion passes through said orifice, wherein the initial average particle size of said dispersion is reduced;
- and
- b) repeating step a), whereby said particle size distribution is controlled and said particle size distribution comprises;
- c) a local maximum ranging from about 21 to about 26 microns;
- d) a local maximum ranging from about 33 to about 38 microns;
- and
- e) a local maximum ranging from about 50 to 60 microns.
4 more elements
A process comprising:
- a) subjecting a dispersion of a silicone elastomer in a solvent to a pressure above 500 psi, said elastomer having an initial average particle size and a particle size distribution;
- b) subjecting said dispersion to a pressure drop through an orifice, whereby said dispersion passes through said orifice, wherein the initial average particle size of said dispersion is reduced;
- and
- c) repeating steps a) and b), whereby said particle size distribution is controlled and comprises:
- i) a local maximum ranging from about 21 to about 26 microns;
- ii) a local maximum ranging from about 33 to about 38 microns;
- and
- iii) a local maximum ranging from about 50 to about 60 microns.
5 more elements
Dependencies are inferred from the claim text.