METHOD FOR PRODUCING ESTERIFIED CELLULOSE NANOFIBER AND RESIN COMPOSITION

• Main Authors: DAIMON TOSHIHIRO, HASEGAWA SAKI, YAMAZAKI NAGATAKE
• Format: Patent
• Language: English; Japanese
• Published: 01.09.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

To provide a method for producing an esterified cellulose nanofiber and a resin composition which enable production of a resin composition that enables formation of a molding having good and stable appearance and physical properties with good process efficiency using an esterified cellulose nanofiber.SOLUTION: A method for producing an esterified cellulose nanofiber includes a modification step of esterifying a pulp containing cellulose and obtaining an esterified pulp, and a fibrillation purification step of fibrillating and purifying the esterified pulp, and producing an esterified cellulose nanofiber, where the esterified pulp contains a high DS component having an esterification degree (DS) of 1.5 or more and 3 or less and a low DS component having an esterification degree (DS) of 0.2 or more and less than 1.5, and the purification is removal of at least a part of the high DS component.SELECTED DRAWING: None 【課題】エステル化セルロースナノファイバーを用いながら、良好且つ安定した外観及び物性を有する成形体を形成し得る樹脂組成物を良好なプロセス効率で製造可能な、エステル化セルロースナノファイバー及び樹脂組成物の製造方法を提供する。【解決手段】セルロースを含むパルプをエステル化してエステル化パルプを得る変性工程と、前記エステル化パルプを解繊及び精製してエステル化セルロースナノファイバーを生成する解繊精製工程と、を含む、エステル化セルロースナノファイバーの製造方法であって、前記エステル化パルプが、エステル化度（ＤＳ）１．５以上３以下の高ＤＳ成分と、エステル化度（ＤＳ）０．２以上１．５未満の低ＤＳ成分とを含み、前記精製が、前記高ＤＳ成分の少なくとも一部の除去である、方法。【選択図】なし