Process for the controlled radical (CO) polymerization of (Meth)

Details Process for the controlled radical (CO) polymerization of (Meth) Process for the controlled radical (CO) polymerization of (Meth)

1997-06-27

1998-09-22

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526135, 526146, 526147, 526172, C08F 406

Patent

active

058115005

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 non-peroxy radical-generator compound and at least one catalyst consisting of a metal complex represented by formula Ma.sub.a (L).sub.n in which M represents Rh, Co or Ir; A represents, a halogen or a pseudohalogen; the groups L, which may be identical or different, each represent a ligand which may be a chiral ligand, which is chosen from cyclooctadiene, PRR'R", P(OR) (OR') (OR"), NRR'R", ORR', SRR', SeRR', AsRR'R", SbRR'R", each radical R, R' and R" independently representing an optionally substituted C.sub.1 -C.sub.14 alkyl group or an optionally substituted aromatic group, it being possible for at least two of these ligands to be joined together by one or more divalent radicals; a is an integer such that 1.ltoreq.a.ltoreq.3 ; n is an integer such that 1.ltoreq.n.ltoreq.5, and in the absence of activator.

REFERENCES:
patent: 4145486 (1979-03-01), Haag et al.
patent: 5708102 (1998-01-01), Fryd et al.
Chemical Abstracts, vol. 85, No. 14, Abstracts No. 94941, "Polymerization and Copolymerization of Vinylic or Diene Compounds", p. 20, c. 1, 4 Oct. 1976, Columbus, OH.
"New Initiator Systems for Radical Polymerization of Vinyl Monomers",Polymer Letters, vol. 5, pp. 697-701, 1967.

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