Abstract: A cosmetic ester composition includes a trimellitic acid ester which is formed by subjecting a trimellitic acid and a C8-C13 alcohol to an esterification reaction, and a C5-C18 carboxylic acid polyol ester. The cosmetic ester composition has a hydroxyl value ranging from 5 mg KOH/g to 100 mg KOH/g, and a viscosity at 20° C. ranging from 150 cP to 1500 cP.

Abstract: Disclosed herein is a scalp protection composition that includes a carboxylate compound, an emulsifier, and water. The carboxylate compound is represented by formula (I): In formula (I), R1 represents a C4-C8 alkyl group, and R2 represents a C10-C26 alkyl group.

Abstract: An emulsion component includes a polyglycerol ester-base emulsifier and a polyglycerol ester-based coemulsifier. The polyglycerol ester-base emulsifier has a hydrophilic-lipophilic balance value greater than 10, and is formed by reacting a first polyglycerol having a degree of polymerization ranging from 4 to 20 with a first acid. The polyglycerol ester-based coemulsifier has a hydrophilic-lipophilic balance value not greater than 10, and is formed by reacting a polyol with a second acid. The polyol is selected from the group consisting of a glycerol and a second polyglycerol having a degree of polymerization ranging from 2 to 10. In addition, a weight ratio of the polyglycerol ester-based emulsifier and the polyglycerol ester-based coemulsifier ranges from 0.75 to 8. An oil-in-water sunscreen product including the emulsion component and an oil-in-water sunscreen lotion including the emulsion component are also provided.

Abstract: Disclosed herein is a scalp protection composition that includes a carboxylate compound, an emulsifier, and water. The carboxylate compound is represented by formula (I): In formula (I), R1 represents a C4-C8 alkyl group, and R2 represents a C10-C26 alkyl group.