| 摘要 |
The present invention relates to the process for obtaining nitrocellulose from cellulose short fibers. Nitrocellulose is a product employed as resin in formulating inks, being responsible for the properties that deal with the transfer and formation of the film formed. It is also largely used in the segments of automotive repainting, sealers, and wood finishes, printing inks using rotogravure and flexography, nail enamels and leather finishes only as illustration for some applications. The process of this invention employs short fibers with mean length equal to or shorter than 0.85 mm, originating from subdivided coils or sheets of alpha-cellulose, whose coils or sheets present density between 0.7 and 1.0 g/cm3 and viscosity above 300 cP, which react with water, sulphuric acid, and nitric acid (sulphonitric mixture or SNM) in a ratio of sulphonitric mixture/cellulose mass varying between 1 :7 and 1 :45.
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