| abstract |
High oil phase pharmaceutical vehicles in the form of an emulsion system having an oil phase content of from about 35% to about 65%, wherein the emulsion system comprises from about 1% to about 13% of an alkylated PVP copolymer, from about 1% to about 7% of an emulsifier, and a solvent system. The solvent system comprises from about 4% to about 18% of a C4-C22 fatty acid, alcohol or ester thereof, from about 2% to about 25% of a glycol ester or diester, and from 0% to about 13% of a branched chain ester of a C4-C22 carboxylic acid. The pharmaceutical vehicles are useful in sunscreen formulations, and especially those containing higher concentrations of benzophenone-3. When such higher concentrations are used, it is advantageous to add up to about 10% of a branched chain ester of a C4-C22 carboxylic acid. |