Block copolymers and a novel method for preparing (co)polymers having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation
US5610248A · kind A · utility
4Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1995 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Mar 6, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation. The present invention also concerns block copolymers and methods of making the same using anionic polymerization in the presence of a phosphonium cation to prepare at least one block of the copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.