Method for preparation of methacrylate and acrylate polymers and copolymers by anionic polymerization
US4056580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1974 |
| Grant date | Nov 1, 1977 |
| Priority date | — |
| Expiry date | Nov 21, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F20/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to anionic polymerization and copolymerization of methacrylate and acrylate esters and related polar monomers, e.g. acrylonitrile, by initiation with carboxylic acid esters formally substituted in the .alpha.-position with Li, Na, K, Rb or Cs and containing 3 - 30 C atoms in the straight or branched chain and 1 - 6 ester group in one molecule either alone or in the presence of C.sub.3 - C.sub.16 alkali metal alkoxide with the straight or branched chain. The polymerization or copolymerization is carried out at -80.degree. to +50.degree. C, advantageously at 20.degree. C and the molar ratios of monomers to .alpha.-metallo ester 10 to 1500 and alkoxide to .alpha.-metallo ester 0.5 to 80. Instead of the pure isolated .alpha.-metallo esters also a reaction mixture may be used which was prepared from the alkaline salt of substituted organic amide and non-metallated ester. Aliphatic, cycloaliphatic or aromatic hydrocarbons, organic ethers or their mixtures were used as solvents for both monomers and initiatora. The method is also suitable for preparation of block copolymers of the aforesaid monomers, if the second or further comonomer is always added after the comple…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.