A process for extracting biosurfactants from the solid content in corn steep liquor, using a buffered aqueous solution having a pH of 6-8 and a biosurfactant extract obtained using the process of the invention, and the uses in cosmetics, food, pharmaceutical, agrochemical and environmental industries. The obtained biosurfactant has the form of a white powder with foaming capacity and is able to reduce water surface tension by at least 16-20 units.

The disclosure provides a liquid antiadhesive composition for unvulcanized rubber having excellent anti-adhesion properties and an excellent balance between liquid transferability and stability. The liquid antiadhesive composition for unvulcanized rubber of the disclosure includes: components (A) to (D) below; and water, in which a mass ratio (A)/(D) of the following component (A) to the following component (D) is 5 to 500. (A): Water-soluble polymer other than component (D) (B): Metal soap (C): Surfactant (D): One or more kinds of compounds selected from water-soluble polymers in which thixotropic index (2 rpm/20 rpm) of 2 mass % aqueous solution at 20 C. is 4.0 or more.