发明公开
- 专利标题: Fine cellulose particles and process for production thereof
- 专利标题(中): 精细纤维素颗粒及其生产方法
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申请号: EP86105421申请日: 1986-04-18
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公开(公告)号: EP0200973A3公开(公告)日: 1988-03-30
- 发明人: Okuma, Shigeru , Yamagishi, Kanji , Hara, Masami , Suzuki, Keizo , Yamamoto, Toshihiro
- 申请人: KANEBO, LTD. , KANEBO RAYON, Ltd.
- 专利权人: KANEBO, LTD.,KANEBO RAYON, Ltd.
- 当前专利权人: KANEBO, LTD.,KANEBO RAYON, Ltd.
- 优先权: JP8263285 19850419; JP21813585 19851002; JP25983285 19851121
- 主分类号: C08L01/06
- IPC分类号: C08L01/06 ; C08B16/00 ; C08J03/16
摘要:
@ 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 mother 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.
(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 mother 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.
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