Photoactive polymer
US7034098B2 · kind B2 · utility
3Cited by
4References
71Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Feb 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A photoactive side-chain polymer from the class of polyimides, polyamide acids and esters thereof, comprising as a side-chain a dendritic block incorporating photoactive groups at its surface. The dendritic block preferably represents a unit of formulae Ia, Ib or a combination of them, for example formulae Ic, wherein the broken line symbolizes the linkage to the polyimide main chain. The polymer may be used as an orientation layer for liquid crystals and in the construction of unstructured and structured optical elements and multi-layer systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.