Cured epoxy resins

• Main Author: JOHN J. KESTER
• Format: Patent
• Language: English
• Published: 30.05.1994
• Edition: 5
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP

The present invention is directed to a novel epoxy polymeric composition resulting from reacting (A) at least one compound containing an average of more than one epoxide group per molecule with (B) at least one curing agent for component (A). At least a portion of the curing agent (B) is at least a first curing agent compound which contains (a) an average of more than one active amine hydrogen atom per molecule and (b) an average of at least one aromatic ring which contains at least one pendant monovalent electron-withdrawing group. The present invention also includes a process for preparing the above polymeric materials. The polymeric materials of the present invention also exhibit nonlinear optical capabilities when formed into an optically transparent medium with a noncentrosymmetric alignment of molecules. The nonlinear optical materials of the present invention are useful in electrooptic devices for use in communications and data processing. Nonlinear optical films produced from the polymeric material show a reduced tendency to reorient due to thermal motion.