Ionomers and/or chain extended/branched copolymers of impact modified vinylidene aromatic monomer and unsaturated compounds
US12173097B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2022 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Sep 14, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2451/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition includes one or more copolymers of one or more vinylidene aromatic monomers and one or more unsaturated compounds containing nucleophilic groups, and the copolymer has on average about 0.01 to about 15.0 percent by weight of nucleophilic groups pendant from the copolymer. The copolymer is chain extended and/or branched by one or more copolymers of one or more vinylidene aromatic monomers and one or more unsaturated compounds having electrophilic groups, or a portion of the chains of the copolymer of one or more vinylidene aromatic monomers and one or more nucleophilic groups are crosslinked with other chains of the copolymer of one or more vinylidene aromatic monomers and one or more nucleophilic groups by ionic bonding of anions formed from the pendant nucleophilic groups with a metal cation having a valence of 2 or greater or complexation between pendant acid groups and metal oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.