Process for the controlled polymerization or copolymerization of

Details Process for the controlled polymerization or copolymerization of Process for the controlled polymerization or copolymerization of

1997-03-21

1999-02-09

Hampton-Hightower, P.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526120, 526147, 526327, 5263293, 5263294, 5263297, 526348, 5263487, C08F 200, C08F 400, C08F21000

Patent

active

058695834

ABSTRACT:
The process for the controlled radical (co)polymerization of (meth)acrylic and/or vinyl monomers is characterized in that the bulk, solution, emulsion or suspension polymerization or copolymerization is carried out, at a temperature at which can fall to 0.degree. C., of at least one of the said monomers in the presence of an initiating system comprising a radical-generating compound and at least one catalyst composed of a metal complex containing a ligand of the type
in which: R.sup.1 and R.sup.2, which are identical or different, represent a branched or unbranched C.sub.1 -C.sub.4 alkyl group or a phenyl group or alternatively R.sup.1 and R.sup.2 form, with the nitrogen atom to which they are connected, a cyclic amine or alternatively the two R.sup.2 groups, taken together, form a polymethylene bridge and R.sup.3 represents a hydrogen atom, an alkyl or benzyl group or an electron-donating or electron-withdrawing functional group.

REFERENCES:
patent: 4680352 (1987-07-01), Janowicz et al.
patent: 5166286 (1992-11-01), Bender et al.
Grove et al., "The homogeneously catalysed addition reaction of polyhalogenoalkanes to olefins by divalent arylnickel complexes: comparative reactivity and some important mechanistic leads", J. Organometallic Chemistry, 372:C1-C6, 1989.

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