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    • 6. 发明授权
    • Fine cellulose particles and process for production thereof
    • 细纤维素颗粒及其生产方法
    • US4902792A
    • 1990-02-20
    • US139860
    • 1987-12-30
    • Shigeru OkumaKanji YamagishiMasami HaraKeizo SuzukiToshihiro Yamamoto
    • Shigeru OkumaKanji YamagishiMasami HaraKeizo SuzukiToshihiro Yamamoto
    • C08J3/16
    • C08J3/16C08J2301/06Y10T428/2982
    • A process for producing fine cellulose particles, which comprises(1) mixing viscose with a water-soluble anionic polymeric compound or polyethylene glycol or its derivative to form a dispersion of fine particles of viscose,(2) (i) heating the dispersion or mixing it with a coagulating agent to thereby coagulate the viscose in the dispersion, and thereafter neutralizing it with an acid to form fine particles of cellulose, or (ii) coagulating and neutralizing the dispersion with an acid to form fine particles of cellulose, and(3) thereafter, separating the fine particles of cellulose from the motor liquor. The fine cellulose particles(a) are composed substantially of II-type cellulose,(b) have a crystallinity, of 5 to 35% by weight,(c) are composed substantially of particles of not more than 20 micrometers, and(d) have a sharp particle size distribution.
    • 一种生产精细纤维素颗粒的方法,其包括(1)将粘胶与水溶性阴离子聚合物或聚乙二醇或其衍生物混合以形成粘胶细颗粒的分散体,(2)(i)加热分散体或混合 用凝结剂凝结分散体中的粘胶,然后用酸中和,形成纤维素微粒,或者(ii)用酸凝固和中和分散体,形成纤维素的微粒;(3) ),然后从运动液中分离纤维素的细颗粒。 微细纤维素颗粒(a)基本上由II型纤维素组成,(b)具有5-35重量%的结晶度,(c)基本上由不大于20微米的颗粒组成,和(d) 具有尖锐的粒度分布。