Copolymers of vinyl dioxolanes and maleimides
US5310839A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Dec 30, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/408
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers are produced when a 4-vinyl-1,3-dioxolane monomer is copolymerized with an imidized maleic anhydride (for example, maleimide) monomer in the presence of a free radical initiator. Alternatively, a maleamic acid or maleimide functionality may be introduced into a copolymer containing a 4-vinyl-1,3-dioxolane and maleic anhydride by introducing a primary amine into the reaction mixture. Also, the dioxolane reactant may be introduced into the polymer by reacting 3,4-epoxy-1-butene in a ketone reaction solvent. The structure and composition of the product copolymer are controlled by both the sequence and conditions of the reaction. Products of this invention can be cast as clear films and can also be used as reactive polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.