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| Number | Title | Issue Date |
| 6646119 | Acetylated pyroxylin The starting pyroxylin is subjected to an acetylation reaction while it is dispersed in a dispersion medium such as toluene and kept in a solid phase state, and acetylated pyroxylin is then separated from a reaction solution by means of filtration, so tha... | 11/11/2003 |
| 6417344 | Acetylated pyroxylin, and its production process The starting pyroxylin is subjected to an acetylation reaction while it is dispersed in a dispersion medium such as toluene and kept in a solid phase state, and acetylated pyroxylin is then separated from a reaction solution by means of filtration, so tha... | 07/09/2002 |
| 6417345 | Method for producing acetylated pyroxylin The invention provides a method for producing acetylated pyroxylin with safety yet at low cost, using inexpensive water-wetted pyroxylin rather than expensive alcohol-wetted pyroxylin. The acetylated pyroxylin is produced by dehydrating the water-wetted p... | 07/09/2002 |
| 6362330 | Polysaccharide-based thermoplastic material, process for preparing the same and method of use thereof The present invention relates to novel thermoplastic materials based on polysaccharide ethers which are simultaneously substituted by carboxylic acid ester groups and carbamate groups, together with mixtures of such derivatives with low molecular weight a... | 03/26/2002 |
| 5831076 | Production of cellulose carbamate with improved solubility properties The invention comprises a process for producing cellulose carbamate with improved solubility properties comprising converting cellulose with urea in an inert, liquid, organic reaction carrier, at reaction temperature in the range of 80° to 180° C. where... | 11/03/1998 |
| 5792856 | Process for preparing carboxyalkyl cellulose esters This invention provides certain carboxymethyl cellulose (CMC) esters of higher acids (e.g., CMC acetate propionate, CMC propionate, CMC acetate butyrate, and CMC butyrate). These new ether derivatives of cellulose esters exhibit solubility in a wide range... | 08/11/1998 |
| 5589577 | Applications and methods for the preparation of fatty acid esters of polysaccharides The invention is related to highly substituted, water-insoluble, poorly water-permeable fatty acid esters of polysaccharides and compositions comprising said polysaccharides esters suitable for use in hot-melt adhesives and as coatings for the controlled ... | 12/31/1996 |
| 5484826 | Free-flowing, quick-dissolving lacquer binder granules The invention relates to free-flowing, quick-dissolving lacquer binder granules based on cellulose esters, more particularly cellulose nitrates, and to a process for their production.... | 01/16/1996 |
| 5378827 | Process for the production of cellulose carbamate A process for the production of cellulose carbamate from cellulose and urea through the conversion of the cellulose with excess urea in an inert liquid organic reaction carrier at a temperature in the range of 130 ° to 160° C., separation of the reactio... | 01/03/1995 |
| 5378826 | Process for the preparation of a storage stable low esterified nitrocellulose moistened with alcohol or water The present invention relates to a process for the preparation of nitrocellulose having particular properties by compression by means of contrarotating rollers.... | 01/03/1995 |
| 5144020 | High productivity spheroid nitrocellulose Fibrous water-wet nitrocellulose containing 4.5 to 5.5% moisture sprayed with a solvent/cosolvent mixture converts to spheroid, densified nitrocellulose via bilateral agitation. A free-flowing dust-free product having a lower burn rate is produced which d... | 09/01/1992 |
| 4849514 | Process for making azidodeoxycellulose This invention is an improved process of making azidodeoxycellulose a hig energetic ingredient for use in a propellant. The process is accomplished by nitrating cellulose to nitrocellulose, converting the nitrocellulose in sequence to the iodine derivati... | 07/18/1989 |
| 4707523 | Magnetic particles Metal oxide containing polymers and particularly styrene, acrylic or protein polymers containing fine, magnetic iron oxide particles are formed by combining a NO2 -substituted polymer with an acid such as hydrochloric acid in the presence of me... | 11/17/1987 |
| 4590019 | Processes for the production of free-flowing nitrocellulose 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 ... | 05/20/1986 |
| 4557951 | Cellulosic organic solvent soluble products The invention provides an improved cellulosic ester or ether product with a degree of ester or ether substitution of between 2.0 and about 2.9 which is derivatized or further reacted by reaction with an acrylamide reactant to provide pendant acrylamide fu... | 12/10/1985 |
| 4462839 | Enteric coating for pharmaceutical dosage forms The application discloses a process for making a polymeric powder which is readily dispersible in water to provide a composition useful for forming an enteric coating on pharmaceutical dosage forms and also a process for using the powder for its intended ... | 07/31/1984 |
| 4401809 | Nitrocellulose purification There is disclosed a multi-vessel autoclave which is suitable for use in a continuous process for purifying nitrocellulose made by the nitric acid-sulfuric acid nitration of cellulose. The autoclave comprises a plurality of adjacent cylindrical vessels wh... | 08/30/1983 |
| 4388458 | Use of ultrasonic energy to improve nitrocellulose purification The instant invention relates to a process for removing trace sulfuric acid rom nitrocellulose fibers by dispersing the fibers in water and then subjecting them to ultrasonic energy for a time period and at an energy level sufficient to enhance the nitroce... | 06/14/1983 |
| 4334060 | Reactor for the gas phase nitration of cellulose A continuous process is provided for the vapor phase nitration of cellulose n a novel reactor having a gas tight housing containing a table with a perforated surface. Cellulose in porous sheet form is continuously passed into the reactor over the perforate... | 06/08/1982 |
| 4323669 | Process for purification of nitrocellulose A process for purification of nitrocellulose containing residual acid from nitration is provided. In this process the nitrocellulose is cut in the presence of water to form an aqueous slurry of cut nitrocellulose fibers. The pH of the slurry is adjusted t... | 04/06/1982 |
| 4242506 | Cross-linking of cellulose sulfate esters with tetravalent metal ions Cellulose sulfate esters are cross-linked with tetravalent metal ions at a threshold pH of about 3.0 or higher. The cross-linked products have a higher aqueous viscosity and are more highly pseudoplastic than the precursor cellulose sulfate and may also e... | 12/30/1980 |
| 4138535 | Nitrite esters of polyhydroxy polymers A polysaccharide or polyvinyl alcohol containing a mixture of nitrite ester groups with sulfate or nitrate ester groups with the mixture of ester groups being substantially uniformly distributed among the polymer units of the polysaccharide or polyvinyl a... | 02/06/1979 |
| 4082617 | Recovery of chemical components of cellulosic regenerating solution Recovery of the chemical components of a cellulosic organic solvent regenerating solution containing a dialkylacylamide, a lower aliphatic monohydric alcohol, a nitrite of the alcohol and nitric acid. The process comprises distilling the solution to remov... | 04/04/1978 |
| 4073660 | Recovery of chemical components of cellulosic regenerating solution Recovery of the chemical components of a cellulosic organic solvent regenerating solution containing a dialkylacylamide, water, nitrous and nitric acid. The process comprises neutralizing the solution to form the metal salts of nitrous and nitric acid, di... | 02/14/1978 |
| 4018637 | Nitrocellulose lacquer with surfactant A nitrocellulose-containing lacquer for producing a smokeless powder propellant, which lacquer includes nitrocellulose, a solvent for the nitrocellulose, water, and a surfactant for preventing the water from forming discrete globules in the lacquer.... | 04/19/1977 |
