Starch nitrates, process for their preparation and

专利名称：Starch nitrates, process for their preparation

and their uses

发明人：NOUAILLANT, MICHEL申请号：EP99400091.7申请日：19990115公开号：EP0931794A1公开日：19990728

摘要：The starch nitrates have a nitrogen content of 6-12 wt.%, and a viscosity index of≥ 40. They are in a solution of 25 wt.% in a ternary solvent mixture with 25 wt.% ethylalcohol at 95 degrees GL, 20 wt.% ethyl acetate and 55 wt.% toluene. It has a

sedimentation of ≤ 20 and a total optical density ≤ 40 determined by spectrophotometryat 460 nm and 630 nm. Preferred features: The solution has a sedimentation of ≤ 10 anda total optical density of ≤ 25. The viscosity index is ≥ 52. The starch nitrates areimpregnated with water and/or at least one composition selected from alcohols,plasticizers, dilutants, solvents or which dissolve in a solvent medium such as ethylalcohol, isopropylic alcohol and Neplast (RTM). The starch nitrates are mixed withnitrocellulose. The starch nitrates can be mixed with a sulfonitric solution composed of15-80 wt.% nitric acid, 50-75 wt.% sulfuric acid and 5-30 wt.% water and a material tobond the sulfonitric mass to the starch mass expressed as dry matter, with a nitrationratio of ≥ 10 at a temperature of 0-40 degrees C. The nitration ratio is ≥ 30. The starchnitrates are stabilized by heating in a water medium for several hours, under pressure ifrequired.

申请人：BERGERAC NC

地址：Boulevard Charles Garaud 24108 Bergerac Cedex FR

国籍：FR

代理机构：Pech, Bernard

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