C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
18/1009, 18/589,
C08L 1/02 (2006.01) C08B 1/00 (2006.01) C08B 16/00 (2006.01) D01F 2/00 (2006.01)
Patent
CA 1111206
Abstract of the Disclosure An improved process is provided for making a precipi- tated cellulose product wherein cellulose is dissolved in a sol- vent containing both a tertiary amine N-oxide solvent and water and precipitated therefrom with water or other non-solvent fox cellulose. The water content of the solution may be adjusted to any level of up to about 29% by weight, preferably between 1.4% and 29% by weight. Also, in practicing the invention, the amount of water included in the solvent is decreased substantially linearly as the amount of cellulose to be di solved increases. A solution substantially free from undissolved cellulose and solid tertiary amine N-oxide which is adapted to be spun, ex- truded or molded at a temperature below the melting point of the tertiary amine N-oxide can be prepared with a tertiary amine N- oxide solvent which contains water as contemplated by the inven- tion. Preferably, N,N,N-triethylamine N-oxide or a tertiary amine N-oxide having a cyclic or pseudo-cyclic molecular struc- ture is mixed with water to form the solvent for cellulose.
316832
Franks Neal E.
Varga Julianna K.
Akzona Incorporated
Borden Ladner Gervais Llp
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