Process for the controlled polymerization or copolymerization of (meth)acrylic and vinyl monomers and products thus obtained
US5869583A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Mar 21, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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 EQU 4-R.sup.3 -2,6-(CH.sub.2 NR.sup.1 R.sup.2).sub.2 C.sub.6 H.sub.2 !--(I) 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.