"TEA" is the acronym for triethanolamine, a quaternary ammonium compound. Triethanolamine reacts easily with fatty acids to form triethanolamine soaps and is used as a basic component in soaps and other cosmetic products. "Oleoyl" refers to oleic acid as the component of a compound, "hydrolyzed collagen" refers to hydrolyzed liquid collagen.
TEA-oleoyl hydrolyzed collagen is a substance used in cosmetic formulations where it acts as a surfactant (washing-active substance; improves the even distribution of products during application), antistatic agent (reduces static charges by neutralizing the electrical charge on the surface, for example of hair) and skin care product (keeps the skin in good condition).