Methods of forming block polymers for directed self-assembly
US9562127B2 · kind B2 · utility
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24Claims
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Key dates
| Filing date | May 16, 2014 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Dec 30, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/01
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Block polymers are formed by ring opening polymerization (ROP) of a cyclic carbonate monomer using a polymeric initiator for the ROP that comprises repeating functionalized ethylene units. The block polymers are free of, or substantially free of, any polymer having a chemical structure that does not comprise the polymer backbone of the polymeric initiator. The block polymers are capable of directed self-assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.