SUNSCREEN COMPOSITIONS CONTAINING COPOLYMERS OF ISOPRENE, BUTADIENE AND/OR STYRENE TO PROVIDE IMPROVED WATER RESISTANCE

摘要

The invention provides waterproof sunscreen compositions which include polymers of isoprene, butadiene and/or styrene, particularly conjugated dienes which may be subject to some degree of hydrogenation. A copolymer of two different conjugated dienes is preferred. The polymers may be selectively hydrogenated to produce polymers which have highly controlled amounts of unsaturation, thereby improving water resistancy.