FIBROUS CELLULOSE, FIBROUS CELLULOSE DISPERSION LIQUID, METHOD FOR PRODUCING FIBROUS CELLULOSE

• Main Authors: TANAKA EITA, FUSHIMI HAYAO
• Format: Patent
• Language: English; Japanese
• Published: 01.10.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; IMPREGNATING OR COATING OF PAPER; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; POLYSACCHARIDES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

To provide a finely fibrous cellulose capable of exhibiting excellent coating suitability when added into a coating material.SOLUTION: There is provided a fibrous cellulose having a fiber width of 1000 nm or less and has a phosphorous acid group or a substituent derived from a phosphorous acid group, wherein a dispersion liquid having a viscosity at 23°C of 2500 mPa s is prepared by dispersing fibrous cellulose in water and when the dispersion liquid is stirred under a predetermined stirring condition, the viscosity change rate calculated by the following expression is within ±50%. Viscosity change rate (%)=(viscosity after stirring-viscosity before stirring)/viscosity before stirring×100.SELECTED DRAWING: None 【課題】本発明は、塗料に添加した際に、優れた塗工適性を発揮し得る微細繊維状セルロースを提供することを課題とする。【解決手段】本発明は、繊維幅が１０００ｎｍ以下であり、亜リン酸基又は亜リン酸基に由来する置換基を有する繊維状セルロースであって、繊維状セルロースを水に分散させて、２３℃における粘度が２５００ｍＰａ・ｓの分散液とし、分散液を所定の撹拌条件で撹拌した場合、以下の式で算出される粘度変化率が±５０％以内となる繊維状セルロースに関する。粘度変化率（％）＝（撹拌後の粘度−撹拌前の粘度）／撹拌前の粘度×１００【選択図】なし