Initiation of anionic polymerization of vinyl monomers by reduced graphite
US4246388A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1979 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Nov 23, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is a process for anionically polymerizing vinyl monomers comprising contacting a vinyl monomer with an electrolytically reduced graphite having formed therein a Graphite R.sub.4 N.sup.+ intercalation compound wherein Graphite is a graphite anion radical and each R is alkyl, preferably alkyl having not more than 8 carbon atoms, to form vinyl polymer. The reduced graphite for polymerizing the vinyl monomers is prepared by electrochemical reduction of a graphite cathode in a polar aprotic solvent containing a quaternary ammonium salt electrolyte to form a graphite anion associated with a quaternary ammonium cation intercalated in the graphite. When the electrolysis is completed the graphite cathode is removed from the electrolysis cell, rinsed and contacted with vinyl monomer either dissolved in a solvent or neat to cause the polymer formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.