Patent ID: 8268335

Claim:
A base formulation, which comprises: (a) a first phase comprising: a single emulsifier of distearyldimonium chloride 1.50-5.00% w/w; saccharide isomerate 1.00-5.00% w/w; glycerin 1.00-5.00% w/w; butylene glycol 1.00-5.00% w/w; sodium lactate 0.5-2.00% w/w; lactic acid 0.01-0.50% w/w; PPG-51/SMDI copolymer 0.10-2.00% w/w; water 50-65% w/w; wherein said sodium lactate and said lactic acid form a lactate buffer having a pH range of 3.8-6.2; (b) a second phase comprising: glyceryl stearate 1.00-5.00% w/w; propylene glycol stearate 0.50-5.00% w/w; cetyl alcohol 0.50-3.00% w/w; jojoba oil refined 0.50-3.00% w/w; isocetyl stearate 0.50-5.00% w/w; decamethylcyclopentasiloxane/dodecamethyl cyclohexasiloxane 0.50-3.00% w/w; 2-phenoxyethanol/3-[(2-ethylhexyl)oxy]-l,2-propandiol 1.00-2.00% w/w; C l2-15 alkyl benzoate 1.00-5.00% w/w; ceramides 0.10-1.00% w/w; soy sterols 0.50-2.00% w/w; PPG-12/SMDI copolymer 0.50-10.00% w/w; and said second phase is combined with said first phase to form a cream base that releases an active ingredient over a period of time up to or about 12 hours; wherein each of said first and second phase weights are based on the weight of the base formulation when phases are combined; wherein the single emulsifier is present as the sole emulsifier in the base formulation.