Processes for the production of free-flowing nitrocellulose
US4590019A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1984 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Sep 5, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B5/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes for the production of free-flowing, non-fibrous, alcohol-moistened nitrocellulose, characterized in that the water- or alcohol-moist nitrocellulose is softened with a solvent mixture of a nitrocellulose solvent and a lower aliphatic alcohol and water until the nitrocellulose fibers disappear, the alcohol-containing, liquid phase is decanted off from the two-phase mixture formed and the nitrocellulose-containing phase is processed into granulate using a screw extruder, the quantity of solvent mixture is used amounting to between 75 and 155% by weight, based on dry nitrocellulose, and the components of the mixture, NC-solvent:lower alcohol:water, being present in a ratio of 1:(0.2-4):(0.2-4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.