Patent · US Expired

Monomers and homopolymers, having high photoinduceable double refraction, prepared therefrom

US6875833B2 · kind B2 · utility

1Cited by

5References

20Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Horst Berneth · Leverkusen, DE
Uwe Claussen · Leverkusen, DE
Serguei Kostromine · Rheinbach, DE
Ralf Neigl · Leverkusen, DE
Hans-Joachim Vedder · Puchheim, DE

Key dates

Filing date	Jul 3, 2002
Grant date	Apr 5, 2005
Priority date	—
Expiry date	Mar 31, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG11C13/042
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Disclosed are monomers which contain groups that are at least trinuclear, which are capable of absorbing the electromagnetic radiation of visible light, and which are structured such that in their thermodynamically stable state they are distended and strongly anisometric. Homopolymers prepared from such monomers, a process of preparing such homopolymers, and articles comprising such homopolymers are also disclosed. The trinuclear groups of the monomers include at least one electron-attracting substituent which gives rise to a dipole moment which forms an angle of at least 20° with the longitudinal axis of the trinuclear groups. The monomers of the present invention contain covalently bonded branching side groups, and may be represented by the following formula,H2C═C(R)—C(O)-§-T—Q—EIn the formula: R is hydrogen or methyl; § represents one of oxygen, sulfur and NR1; T represents a (CH2)n radical, optionally interrupted by, for example, —O—; Q represents a divalent linking group; and E represents the trinuclear group, e.g., a trinuclear group represented by the following formula (VII),

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