Patent · US Expired

Azo dyestuff- and urethane-containing polyadduct and its use in nonlinear optics

US5616678A · kind A · utility

7Cited by

4References

12Claims

0Family size

Assignee

BASF SE

Inventors

Stefan Beckmann · Mannheim, DE
Karl-Heinz Etzbach · Bischofswerda, DE
R udiger Sens · Mannheim, DE
Karl H aberle · Speyer, DE

Key dates

Filing date	Oct 19, 1994
Grant date	Apr 1, 1997
Priority date	—
Expiry date	Oct 19, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/3612
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Azo dyestuff- and urethane-containing polyadducts comprising PA1 (a) at least one organic polyisocyanate, PA1 (b) at least one diol of a heterocyclic azo dyestuff, and if desired PA1 (c) one or more compounds having at least two groups reactive to NCO, which have an average molecular weight M.sub.n of up to 500 g/mol, and/or PA1 (d) one or more polyhydroxy compounds having average molecular weights M.sub.n of from over 500 up to 5000 g/mol. These polyadducts are suitable for applications in nonlinear optics.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.