Stewart and Kolasch, Ltd.
Photo-degradable resin composition
 A photo-degradable synthetic resin composition which consists of a blend of a butadiene-containing graft copolymer and a thermoplastic resin. The blend consists essentially of (A) 50-99 parts by weight of a graft copolymer containing at least 30% by weight of butadiene monomer, said copolymer being composed of 40-80 parts by weight of butadiene or a copolymer thereof, 60-20 parts by weight of styrene, methyl methacrylate or a mixture thereof and 0.01-5 parts by weight of a cross-linking agent copolymerizable therewith, and (B) 1-50 parts by weight of polystyrene, polymethyl methacrylate, polyacrylonitrile, polyvinyl chloride, polyvinylidene chloride or copolymers thereof. 
Kureha Kagaku Kogyo Kabushiki Kaisha
Y Y C
Y10S Y10S C08L
additional additional inventional
Teruo Naohiro Yo Takayuki
Sakagami Murayama Iizuka Katto