Branched polycarbonate resins and processes to prepare the same
US7759456B2 · kind B2 · utility
4Cited by
15References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Jan 10, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/307
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of increasing the branching and polydispersity of a polycarbonate includes the steps of: (a) including in the polycarbonate at least one species of an alkyl substituted monomer, and (b) treating the polycarbonate at an elevated temperature and for a sufficient time to increase the branching and polydispersity relative to an otherwise equivalent polycarbonate without alkyl substituents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.