The invention relates to high-activity catalysts for olefin polymerization, to efficient methods for producing them, and to efficient methods of using the catalysts for producing high-quality polyolefins. The olefin polymerization with the catalysts does not require a large amount of an organic aluminium...http://www.google.es/patents/US6395846?utm_source=gb-gplus-sharePatente US6395846 - Catalysts for olefin polymer production
