Modification of polymers having aromatic groups through formation of boronic ester groups
US7671157B2 · kind B2 · utility
14Cited by
8References
15Claims
0Family size
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Key dates
| Filing date | Apr 2, 2008 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Apr 2, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F12/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The C—H bond of pendant aromatic groups such as commercial polystyrenes with three types of tacticities (syndiotactic, isotactic, atactic) undergo catalyzed functionalization with boron reagents. A boronic ester group formed on the polymer in the polystyrene was further converted to hydroxy and arene via oxidation and coupling reactions, respectively. These functionalizations proceeded without significantly affecting the molecular weight of starting polymer and the functional concentrations could be easily controlled by changing the ratio of boron reagent to monomer unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.