Biodegradable polyesters for water-resistant oil-in-water suncare formulations

A waterproofing polymer that is a reaction product of the following components:

• (i) at least one polyglycerol;
• (ii) at least one dimer acid;
• and (iii) at least one fatty acid having 8-30 carbon atoms;
• wherein (iii) and (i) are in a molar ratio of less than 2:1;
• and
• wherein the at least one polyglycerol comprises a mixture of oligoglycerols having the following oligomer distribution:
• (a) 0 to 30 wt % glycerol;
• (b) 10 to 40 wt % diglycerol;
• (c) 10 to 65 wt % triglycerol;
• (d) 2 to 25 wt % tetraglycerol;
• (e) 0 to 15 wt % pentaglycerol;
• (f) 0 to 15 wt % hexaglycerol;
• (g) 0 to 10 wt % heptaglycerol;
• (h) 0 to 10 wt % octaglycerol;
• (i) 0 to 5 wt % nonaglycerol;
• and
• (j) 0 to 5 wt % decaglycerol;
• wherein all weight percentages are based on 100 wt % of the at least one polyglycerol.