Preparation of novel homo- and copolymers using atom transfer radical polymerization

Patent 5789487 Issued on August 4, 1998. Estimated Expiration Date:

July 10, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Inventors

Assignee

Carnegie Mellon University

Application

No. 677828 filed on 07/10/1996

US Classes:

525/301, Oxygen atom is part of a carboxylic acid group525/268, Specified material contains a transition metal atom525/269, Transition metal is other than Group IVB, VB, or VIB metal atom525/312, Oxygen atom is part of an ether group526/172Transition metal compound has at least one atom of P, S, N or O therein

Examiners

Primary: Zemel, Irina S.

Attorney, Agent or Firm

Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

International Classes

C08F 291/04
C08F 004/10

Abstract

The present invention is directed to a process of atom (or group) transfer radical polymerization for the synthesis of novel homopolymer or a block or graft copolymer, optionally containing at least one polar group, with well defined molecular architecture and narrow polydispersity index, in the presence of an initiating system comprising (i) an initiator having a radically transferrable atom or group, (ii) a transition metal compound, and (iii) a ligand; the present invention is also directed to the synthesis of a macromolecule having at least two halogen groups which can be used as a macroinitiator component (i) to subsequently form a block or graft copolymer by an atom or group transfer radical polymerization process; the present invention is also directed to a process of atom or group transfer radical polymerization for the synthesis of a branched or hyperbranched polymer; in addition, the present invention is directed to a process of atom or group transfer radical polymerization for the synthesis of a macroinitiator which can subsequently be used to produce a block or graft copolymer.

Other References

M.Kato et al, Polymerization of Methyl Methacrylate with Carbon Tetrachloride/dichlorotris(triphenylphosphine)ruthenium(IIO/Methylaluminum Bis(2,6-di-tert-butylphrnoxide) initiating System. Macromolecules, 1995, 28, 1721-23
E. Patten et al, "Polymers with Very Low Polydispersities from Atom Transfer Radical Polymerization", Science,272, May 1996, 864-68
J-S.Wang et al "Controlled Sequential and Random Radical Copolymerization of Styrene and Butyl Acrylate", Polym. Prepr. (ACS) 36 (1), 1995, 46