Process for the controlled radical polymerization or copolymeriz

Details Process for the controlled radical polymerization or copolymeriz Process for the controlled radical polymerization or copolymeriz

1997-06-27

2000-09-05

Lipman, Bernard

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526328, 526341, 526343, 526344, C08F 406

Patent

active

061144827

ABSTRACT:
This process is characterized in that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension at a temperature which may be as low as 0.degree. C., in the presence of an initiator system comprising at least one radical-generator compound other than an arenesulphonyl chloride; and at least one catalyst consisting of a metal complex represented by the following formula (I): Ma.sub.a (L).sub.n in which: M represents Ni, Pd or Pt; A represents a halogen or a pseudohalide; the groups L are ligands of the metal M, which are chosen independently from those containing at least one from among N, P, As, Sb, and Bi, it being possible for at least two of these ligands to be connected together by one or more divalent radicals; a is an integer from 1 to 5; n is an integer from 1 to 4; with 4.ltoreq.a+n.ltoreq.6, a+n representing the coordination number of the complex.

REFERENCES:
patent: 4145486 (1979-03-01), Haag et al.
patent: 5763548 (1998-06-01), Matyjaszewski et al.
patent: 5807937 (1998-09-01), Matyjaszewski et al.
"Polymerization of Vinyl-and Ethynlferrocene", Simionescu et al., Makromol. Chem., 163, pp. 59-74, (1973).
Hargreaves, "The Initiation of Vinyl Polymerization by Tetrakis (Trialkyl-Phosphite) Nickel (O) Derivatives", J. of Polymer Science (Part A: Polymer Chem.), vol. 26, pp. 465-476, 1988.

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