Compatibilizing agents suitable for blending otherwise immiscible polymers comprise a block or graft copolymer in which at least one of the block segments is formed by a living anionic polymerization and thereafter chemically converted to provide a polymer having at least one functional end group. The...http://www.google.de/patents/US5264491?utm_source=gb-gplus-sharePatent US5264491 - Compatibilization of polymer blends
