Methods of producing a polymer include contacting at least one olefin with a catalyst prepared by contacting a support comprising alumina with a sulfating agent and with chromium. Polymer compositions produced in this manner may exhibit relatively low levels of long chain branching and relatively high...http://www.google.es/patents/US7112643?utm_source=gb-gplus-sharePatente US7112643 - Polymers having low levels of long chain branching and methods of making the same
Polymers having low levels of long chain branching and methods of making the ...
