EP 0013850 B1 19820721 - GRANULAR PROPELLANTS BASED ON NITROCELLULOSE, NITRATED OIL AND POLYVINYL NITRATE AND PROCESS FOR PRODUCING THEM
Title (en)
GRANULAR PROPELLANTS BASED ON NITROCELLULOSE, NITRATED OIL AND POLYVINYL NITRATE AND PROCESS FOR PRODUCING THEM
Publication
Application
Priority
FR 7836103 A 19781222
Abstract (en)
[origin: US4347087A] The present invention relates to propellant powders based on nitrocellulose, nitrated oil and polyvinyl nitrate and also to the process for their manufacture. The powders according to the invention contain between 50 and 75 parts by weight of nitrocellulose, between 5 and 25 parts by weight of nitrated oil and between 5 and 25 parts by weight of polyvinyl nitrate. The manufacturing process consists in malaxating the energy-producing bases in the presence of an acetone/alcohol mixture until a homogeneous paste is obtained, which is extruded, drained, chopped, soaked and dried, and the process is characterized in that (i) the proportion of acetone in the paste during malaxation is between 30 and 36% by weight, relative to the dry nitrocellulose and the dry polyvinyl nitrate, and in that the weight ratio acetone/alcohol is between 1.10 and 1.50, (ii) the first step is to mix the nitrocellulose with the nitrated oil in the presence of solvents, and in that the solid polyvinyl nitrate is added to the mixture in portions, and (iii) the draining before chopping is carried out at a temperature below 30 DEG C. The powders according to the invention are particularly suitable as gunpowder for combat tanks.
IPC 1-7
IPC 8 full level
C06B 21/00 (2006.01); C06B 25/24 (2006.01); C06B 45/10 (2006.01)
CPC (source: EP US)
C06B 21/0066 (2013.01 - EP US); C06B 25/24 (2013.01 - EP US); C06B 45/105 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE GB IT LU NL SE
DOCDB simple family (publication)
EP 0013850 A2 19800806; EP 0013850 A3 19800820; EP 0013850 B1 19820721; AU 526506 B2 19830113; AU 5415179 A 19800626; CA 1143165 A 19830322; DE 2963381 D1 19820909; FR 2444651 A1 19800718; FR 2444651 B1 19820423; IL 58818 A 19821231; NO 148413 B 19830627; NO 148413 C 19831005; NO 794131 L 19800624; US 4347087 A 19820831
DOCDB simple family (application)
EP 79401002 A 19791211; AU 5415179 A 19791221; CA 341336 A 19791206; DE 2963381 T 19791211; FR 7836103 A 19781222; IL 5881879 A 19791127; NO 794131 A 19791218; US 10064679 A 19791205