MIXED CELLULOSE NITRATES WITH PHTHALATE GROUPS AS POLYMER BASIS FOR GLUES, PAINTS, COATINGS, SOLID ROCKET FUELS, AND METHOD OF PREPARATION THEREOF Russian patent published in 2001 - IPC

FIELD: cellulose derivatives. SUBSTANCE: invention provides novel high- molecular substance with general formula , wherein x= 2.0 to 2.9, y=0-(3- x), (X₁+y)=0.1 to 1.0, and n=350 to 1007, characterized by elevated burning rate and inflammability, elevated adhesion strength and better solubility in organic solvents. This substance is prepared by condensation of cellulose nitrates with 11.8-13.5% N or pyroxylin powder cellulose nitrates with phthalic anhydride in solvent at 50-110 C at stirring for 1 to 6 h while observing proportion of 0.5 to 2 mole of anhydride per each nitrate group of nitrocellulose motif. Product is precipitated, filtered, washed with water, and dried. In order to precipitate free flowing and low- electrifiable product, water warmed to 50-60 C is slowly dosed to reaction mixture at the same temperature. EFFECT: reduced cost price of product due to use of aged and rejected pyroxylin powders as starting materials. 3 cl, 2 tbl, 12 ex