Initiation system comprising a silylated initiator for anionic (co)polymerization of (meth)acrylic monomer(s) and process using same
US6319875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1998 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Apr 10, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/58
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The initiation system comprises (1) at least one silylated initiator and (2) at least one alkaline metal alcoholate as ligand. The silylated initiator may be monofunctional and selected in particular from among the compounds of Formula (I) or difunctional and selected in particular from among the compounds of Formula (II): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 each independently represent a C.sub.1 -C.sub.8 alkyl radical, linear or branched; R.sup.4 is a linear or branched C.sub.1 -C.sub.8 alkylene radical; M is an alkaline metal or alkaline earth metal (valence q of 1 or 2); R.sup.5 and R.sup.6 each independently represent an alkyl radical, linear or branched, at C.sub.1 -C.sub.8 ; R.sup.7, R.sup.8 each independently represent a C.sub.1 -C.sub.8 alkylene radical, linear or branched; M' is an alkaline metal. Application is to the preparation of (meth)acrylic (co)polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.