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Stable O/W Nanoemulsions for Skin and Other Topics: Literature Findings

By: Charles Fox, Independent Consultant
Posted: February 26, 2010, from the March 2010 issue of Cosmetics & Toiletries.

page 5 of 6

R1[(AO)m/(EO)n]R2

where AO = C3-4 oxyalkylene; EO = oxyethylene; m, n = 1-70; the ratio of EO/(EO + AO) is 50–100%; and R1,2 = C1-4 hydrocarbyl.

The polyoxyethylene-polyoxyalkylene random copolymer dialkyl ethers were arranged as:

Y[O(EOa)/(AO)bR]k

where Y = polyhydric alcohol residue; k = 3-6; EO, AO = C3-4 oxyalkylene; a, b = 1-70; and R = C1-4 hydrocarbyl.