TWI797276B

• Main Authors: TOMITA, YUSUKE, YAMAMOTO, YUGO
• Format: Patent
• Language: Chinese
• Published: 01.04.2023
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED 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; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The present invention addresses the problem of providing an encapsulating material for display elements that not only sufficiently encapsulates display elements but is also less likely to produce uneven streaks after encapsulation. The encapsulating material for display elements that solves the problem comprises (A) an aliphatic (meth)acrylic monomer, (B) an azo-based polymerization initiator, (C) a 2,2,6,6-tetramethylpiperidine 1-oxyl free radical derivative, and (D) a silane coupling agent having a (meth)acrylic group and a weight-average molecular weight of 400-500,000. The glass transition temperature determined after 30 minutes of heating at 100˚C is ≥46˚C.