Process for chemical modification of polyolefins to improve their wettability
US4080405A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Mar 21, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F255/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for chemical modification of polyolefins, particularly fibrillar, powder, granular or film polyolefins, in which one or more polar monomers are grafted to the polyolefins in an aqueous dispersion, by means of a free-radical generator. Grafting is done in the presence of a wetting agent and a particular additive derived from alkanes and possessing at least 1 thiol function; the dispersion contains 0.1 to 50 parts weight of monomer, 0.1 to 3 parts weight of wetting agent, and 0.1 to 3 parts weight of additive, for 100 parts weight of polyolefin. Polyolefins that have undergone this process have an improved wettability and, in applications requiring treatment in an aqueous suspension, such as the production of partly synthetic paper, this facilitates their dispersion in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.