Preparation of polyolefins with peroxide end-groups and their use in the synthesis of block copolymers
US3949018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1972 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Jun 12, 1992 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of polymers containing peroxide end-groups, in which one or more monomers, particularly alpha-olefins, are polymerized by means of a co-ordination catalyst in the presence of an adjuvant with the formula M(X)p, where M is boron or a metal in column IIb of the Periodic Table of Elements, p is the valency of M, and X is at least one monovalent organic radical, a hydrogen atom or a halogen, the polymer obtained is treated with a peroxidizing agent, without being de-activated, and the resulting polymer containing peroxide groups is collected. Polymers with peroxide end-groups obtained by this process, particularly olefins with peroxide end-groups, can be used to initiate polymerization of vinylic monomers, and are accordingly useful in the synthesis of block copolymers, in which one part is formed from the polymeric part of the macromolecular peroxide and the other part is derived from the vinylic monomer or monomers polymerized by means of this peroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.