Polyfunctional polymerization initiator
US5164477A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Aug 2, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/0233
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyfunctional polymerization initiator suitable to cationic ring-opening polymerization of heterocyclic monomers, having at least one carbon atom bonded directly to a carbon-carbon double bond in a linear or cyclic organic group and, further, having at least two following groups containing the above said carbon atoms and represented by the general formula: EQU --CH.sub.2 X where X represents an electron attracting group such as I, Br, Cl, F, --OSO.sub.2 R, --SOR, --OCOR, --OPO(OR).sub.2 and --OP(OR)R and R is optionally selected from (substituted) alkyl groups or (substituted) aryl groups. Various types of telechelic polymer, block copolymer, comb-like polymer and star-like polymer having controlled molecular weight and narrow molecular weight distribution can be produced efficiently from the heterocyclic monomer as the starting material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.