PEARLESCENT STRUCTURES 587 Table V Characteristics of Pearlescent AerosoP Formulations (Polyoxyethylene Lauryl and Cetyl Ether Systems) Pearlescence Components Rating Product Characteristics 2 Discharges as a bubbly liquid which works up to a fairly creamy foam in the hand 3 Quiet liquid discharge which expands into a nice foam 3 Noisy, semiliquid, foamy discharge-- expands to medium dense foam 3 Discharges as a thin, bubbly liquid which works up to a thin foam 3 Noisy, bubbly, liquid discharge--ex- pands to a thin foam POE (23) lauryl ether, eetyl alcohol, palmitic acid POE (10) cetyl ether, myristyl alcohol POE (10) cetyl ether, cetyl alcohol POE (20) cetyl ether, cetyl alcohol POE (20) cetyl ether, cetyl alcohol, palmitic acid 90% aqueous concentrate, 10% Freon 12/Freon 114 (15/85) propellant. Table VI Characteristics of Pearlescent Aerosol a Formulations (Polyoxyethylene Stearyl and Oleyl Ether System) Pearlescence Components Rating Product Characteristics POE (20) stearyl ether, myristyl alcohol 3 POE (20) stearyl ether, eetyl alcohol 3 POE (20) stearyl ether, eetyl alcohol, 3 palmitic acid POE (20) oleyl ether, myristyl alcohol 2 POE (20) oleyl ether, cetyl alcohol 3 POE (20) oleyl ether, stearyl alcohol 3 POE (20) oleyl ether, cetyl alcohol, pal- 2 mitic acid Slightly noisy liquid discharge--ex- pands to a medium dense foam Noisy liquid discharge that expands only slightly to a somewhat viscous, foamy liquid Noisy, bubbly discharge that expands into a good, creamy foam Quiet discharge, expands to a fairly dense foam Slightly noisy liquid discharge--ex- pands to a fairly nice foam Noisy, bubbly discharge--expands to a thin foam Slightly noisy semiliquid discharge-- expands to a medium dense foam 90% aqueous concentrate, 10% Freon 12/Freon 114 (15/85) propellant. The two classes of polyoxyethylene fatty ethers are listed in Table VII. The oleyl ethers are not listed in either category because they were not included among the surfactants that were studied in the pre- vious investigation.

588 JOURNAL OF THE SOCIETY OF COSMEFIC CHEMISTS Figure 3. Pearlescent aerosol systems a. POE (20) stcaryl ether ectyl alcohol b. POE (20) oleyl ether cetyl alcohol Table V I I Emulsion Stability and Peurlescencc with Polyoxyethylenc Fatty Ether/Fatty Alcohol Combinations POE Ethers Producing Stable Emulsions (30 rain) but Nonpearlescent Systems POE Ethers Producing Unstable Emulsions (1 rain) but Pearlescent and Iridescent Systems POE (4) lauryl ether POE (2) cetyl ether POE (2) stearyl ether POE (315) lauryl ether POE (10) cetyl ether POE (20) cetyl ether POE (20) stearyl ether