Method for the preparation of polymers and copolymers of vinyl monomers by anionic polymerization
US4238588A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1978 |
| Grant date | Dec 9, 1980 |
| Priority date | — |
| Expiry date | Dec 19, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/026
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention pertains to a method for preparation of polymers, grafted polymers, and copolymers from olefins substituted by polar groups (ester, nitrile, or aryl) or from dienes, wherein the polymerization is initiated by the system formed by mixing of an organic amide of alkaline metal with an alkaline metal alkoxide. The organic amide is derived from primary or secondary amines or polyamines, or from tertiary polyamines containing at least one primary or secondary amino group. These amines contain N-C or N-Si bonds, 1-4000 C atoms and 1-1000 N atoms in a molecula, or have the molecular weight below 100,000. The alkoxides are derived from C.sub.3 -C.sub.16 alcohols. The polymerizations are carried out at -80.degree. to +80.degree. C. (advantageously at +20.degree. C.), at the monomer/organic amide molar ratio 5-1500, at the molar ratio alkoxide/amide 0.5-10, and in hydrocarbon or ether solvents. The advantage of organic amides of alkaline metals is the easy and economical preparation and suitable physical and chemical properties (solubility, higher resistance to contamination), while the alkoxide component exhibits the superadditive effect on the polymerization rate and yield and…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.