The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2010
Filed:
Aug. 19, 2005
Guillermo C. Bazan, Santa Barbara, CA (US);
Steve Diamanti, Santa Barbara, CA (US);
Edward J. Kramer, Santa Barbara, CA (US);
Vikram Khanna, Goleta, CA (US);
Glenn H. Frederickson, Santa Barbara, CA (US);
Atsushi Hotta, Higashikurume, JP;
Guillermo C. Bazan, Santa Barbara, CA (US);
Steve Diamanti, Santa Barbara, CA (US);
Edward J. Kramer, Santa Barbara, CA (US);
Vikram Khanna, Goleta, CA (US);
Glenn H. Frederickson, Santa Barbara, CA (US);
Atsushi Hotta, Higashikurume, JP;
The Regents of the University of California, Oakland, CA (US);
Abstract
A method of preparing a polymer having a tapered block copolymer structure. The method comprises polymerizing a first olefin monomer and a different second olefin monomer in the presence of a catalyst supporting living or quasi-living polymerization. In certain embodiments, the catalyst comprises two neutral metal complexes. In preferred embodiments, a tapered block copolymer structure is formed by adding one monomer in a single batch at the start of the polymerization reaction, and adding a second monomer throughout the course of the reaction. The present invention also provides polymers having one or more tapered block copolymer sections, and compositions based on these polymers.