Pituitous silicone fluids

摘要

Personal care compositions containing pituitous silicone fluids compositions are disclosed. The silicone fluid compositions contain certain branched and/or high molecular weight organopolysiloxanes that demonstrate pituitous rheological behavior. When formulated into personal care compositions, the silicone fluids provide enhanced sensory and film-forming properties based on their pituitous rheological properties.

主权项

1. A personal care composition comprising a silicone fluid having pituitous rheological properties wherein the silicone fluid comprises a highly branched organopolysiloxane prepared by reacting;
a′) an organohydrogencyclosiloxane having the formula [(CH3)HSiO]g where g is 3 to 8, and b′) a vinyl terminated polydimethylsiloxane having the average formula (CH2═CH)Me2SiO(Me2SiO)dpSiMe2(CH═CH2) having a degree of polymerization (dp) of 4000 to about 4800, in a carrier fluid and in the presence of a hydrosilylation catalyst where the amount of a′) and b′) in the reaction is such to provide a molar ratio of vinyl to SiH of 0.9/1 to 1.2/1, and a solids content of at least 5 wt %, wherein the pituitous rheological properties of the silicone fluid are determined from a plot of normal force in Pascals vs a perpendicular shear rate in sec−1 wherein the plot falls above a limit line having the equation y=3.6x where y is the normal force and x is the perpendicular shear rate, and wherein the carrier fluid is a hydrocarbon solvent.