Cellulose dope and process for producing the same

Details Cellulose dope and process for producing the same Cellulose dope and process for producing the same

D - Textiles, Paper

21

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D21H 17/64 (2006.01) C08B 1/00 (2006.01) C08B 1/08 (2006.01) C08J 5/00 (2006.01) C08L 1/00 (2006.01) D01F 2/02 (2006.01) D21C 1/06 (2006.01)

Patent

CA 2384767

A cellulose dope comprising an aqueous caustic soda solution and a cellulose dissolved in the solution, characterized in that the concentration of caustic soda (CNa) is 6.5 to 11 wt.%, the cellulose content (CC) is 4 to 12 wt.%, and zero-shear viscosity of the cellulose dope (.eta.0), the cellulose content (CC), and the viscosity-average degree of polymerization of the cellulose satisfy the following relationship (1): .eta.0 = kCCm × DPCp. In the relationship, .eta.0 represents zero-shear viscosity of the cellulose dope (mPa.s); CC represents cellulose content of the cellulose dope (wt.%) DPC represents viscosity-average degree of polymerization of the cellulose in cellulose dope; K = 3.9 × 10-11; 5 <= m <= 7; and 3 <= p <= 4.

L'invention concerne une composition lubrifiante en cellulose comprenant une solution aqueuse d'hydroxyde de sodium et une cellulose dissoute dans la solution caractérisé en ce que la concentration en hydroxyde de sodium (CNA) est comprise entre 6,5 et 11 % en poids et la teneur en cellulose (Cc) est comprise entre 4 et 12 % en poids. Le coefficient de viscosité de cisaillement zéro de la composition lubrifiante en cellulose (.eta. 0), la teneur en cellulose (Cc) et le degré de viscosité moyenne de polymérisation de la cellulose correspondent à l'équation (1) suivante .eta.?0¿ = KC¿C??m¿ x DP¿C??p¿, dans laquelle .eta. 0 désigne le coefficient de viscosité de cisaillement zéro de la composition lubrifiante (mPa.s), Cc désigne la teneur en cellulose de la composition lubrifiante en cellulose (exprimée en % en poids), DPc désigne le degré de viscosité moyenne de polymérisation de la cellulose dans la composition lubrifiante en cellulose, K = 3.9 x 10?-11¿; 5 <= m <= 7; et 3 <= p <= 4.

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