Cellulose ester phase difference film and application thereof

• Main Authors: CUI KUNPENG, HAN XUEQING, LI LIANGBIN, AN MINFANG
• Format: Patent
• Language: Chinese; English
• Published: 14.10.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention provides a cellulose ester phase difference film and application thereof. The phase difference film comprises the following components: cellulose ester, an additive and a solvent, wherein the additive is an esterified compound at least containing three branched chain structures. The esterified compound comprises any one of substituted or unsubstituted phosphate, substituted or unsubstituted glyceride, substituted or unsubstituted citrate, substituted or unsubstituted xylitol ester, substituted or unsubstituted sorbate, substituted or unsubstituted carboxylate and polyvinyl acetate; wherein the substituent group comprises at least one of C1-C30 alkyl, aryl, acetyl and halogen. According to the invention, the esterified compound containing at least three branched chain structures is added into the cellulose ester phase difference film, so that the retardation value reaches the standard under the condition that the light transmittance and the haze can meet the requirements of an optical film, and t