Methods for making multi-branched polymers

US8013065B2 · kind B2 · utility

Assignees

• International Business Machines Corporation · US
• The Board of Trustees of the Leland Stanford Junior University · US

Inventors

• James L. Hedrick · Pleasanton, US
• Eric A. Appel · Palo Alto, US
• Robert D. Miller · San Jose, US
• Fredrik Nederberg · Wilmington, US
• Robert M. Waymouth · Palo Alto, US

Key dates

• Filing date: Jun 9, 2009
• Grant date: Sep 6, 2011
• Expiry date: Jul 18, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2438/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for making a multi-branched polymer includes reacting a first polymeric unit with a functional cyclic compound to form a functional macroinitiator compound with a cyclic moiety. The functional macroinitiator compound is reacted with an amine functional compound to open the cyclic moiety and form a first functional group and a second functional group. To form the branched polymer, at least one of a second polymeric unit is propagated from the first functional group and a third polymeric unit is propagated from the second functional group.