Photoactive polymer

Details Photoactive polymer Photoactive polymer

2006-04-25

2006-04-25

Hightower, P. Hampton (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S310000, C528S350000, C528S353000, C528S272000, C528S373000, C528S391000, C522S162000, C522S165000, C428S001100, C428S001260, C428S411100, C428S473500, C428S064400, C525S437000, C525S444000

Reexamination Certificate

active

07034098

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.

REFERENCES:
patent: 5976640 (1999-11-01), Yu et al.
patent: 6340506 (2002-01-01), Buchecker et al.
patent: 6649230 (2003-11-01), Seiberle et al.
patent: 6831148 (2004-12-01), Buchecker et al.
patent: WO 99/15576 (1999-04-01), None

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