Star-branched thermoplastic ionomers
US5039752A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1989 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jan 6, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel star-branched ionomers having at least three branches covalently bonded to a central linking moiety; each branch contains a long inner block comprising non-ionic mers and an outer block comprising at least two ionic mers. Elasticity is provided by the non-ionic blocks and the ionic outer blocks aggregate at room temperature but dissociate and higher temperature, giving the star-branched ionomers thermoplastic characteristics. Star-branched polymers may be provided by growing a first (outer) block as a linear polymer, growing a second (inner) block from the end of the living polymer, linking three or more such linear block polymers to a central linker compound and selectively ionizing the first blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.