Preparation of novel homo- and copolymers using atom transfer ra

Details Preparation of novel homo- and copolymers using atom transfer ra Preparation of novel homo- and copolymers using atom transfer ra

1997-09-30

1999-08-31

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525168, 525243, 525245, 525247, 525255, 525258, 525259, 525261, 525269, 525 90, 525135, 525145, 525146, 525147, C08F 444, C08F 400

Patent

active

059454911

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.

REFERENCES:
Kato et al., "Poylmerization of Methyl Methacrylate With the Carbon Tetrachloride/Dicholrotris(triphenylphenlphospine)ruthenium(II)Methylalumi num . . .", Macromolecules 1995, 28, 1721-1723.
Patten et al., "Polymers with Very Low Polydispersities from Atom Transfer Radical Polymerization", Science, vol. 272, pp. 866-868.
J.S. Wabg et al., "Controlled Sequential and Random Radical Copolymerization of Styrene and Butyl Acrylate", Polym. Prepr. (ACS) 36(1), 1995, 465.

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