Process for preparing narrow molecular weight distribution syndiotactic block copolymers of unsaturated carboxylic acid esters with .alpha.-olefins
US5132369A · kind A · utility
10Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1991 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Feb 14, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F20/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a narrow molecular weight distribution syndiotactic block copolymer of an unsaturated carboxylic acid ester (e.g., acrylate of methacrylate) with an .alpha.-olefin (e.g., ethylene) by using, as an initiator, at least one organometallic compound of the group consisting of (a) trivalent organic Y compounds, and (b) trivalent organic lanthanide (La, Ce, Pr, Nd, Pm, Sm, Eu, Ga, Tb, Dy, Ho, Er, Tm, Yb, Lu) compounds, or a combination thereof with an organoaluminum compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.