Process for the modification of olefin polymers to form a coupling agent
US5266643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1991 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Jun 3, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for the modification of an olefin polymer to form a coupling agent by grafting it with an unsaturated acid or acid derivative in the presence of a free-radical initiator. The process comprises stages at which PA0 a) the olefin polymer, the unsaturated acid or acid derivative and a first free-radical initiator are heated together to a temperature at which the first free-radical initiator substantially breaks down into free radicals, and PA0 b) the reaction mixture derived from stage a) is heated together with a second free-radical initiator to a temperature at which the second free-radical initiator substantially breaks down into free radicals. By the process, olefin polymers can be modified effectively without their macromolecules degrading excessively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.