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| Number | Title | Issue Date |
| 6712896 | Cellulose ester film, optical film, polarizing plate, optical compensation film and liquid crystal display A cellulose ester film comprises (a) an ultraviolet absorbent polymer having at least one of repeating units represented by formulae (1) and (2) and repeating units having ultraviolet absorbent structures represented by formulae (3), (4) and (5), (b) an ultraviolet ... | 03/30/2004 |
| 6022614 | Method for preparing a cellulose formate solution by impregnating and kneading cellulose slabs Process for preparing a solution of cellulose formate from cellulose plates, in particular high-density plates, without prior mechanical destruction of these plates. The plates are dissolved directly, by means of an impregnating step of the whole plates i... | 02/08/2000 |
| 5880278 | Composition containing cellulose formate, capable of forming an elastic, thermoreversible gel A composition containing cellulose formate and a solvent system. At a temperature at least equal to a value Tf the composition is a solution, and at a temperature appreciably less than Tf the composition is an elastic, thermoreversib... | 03/09/1999 |
| 5446140 | Polymer blend composed of cellulose acetate and starch acetate and starch used to form fibers, films and plastic materials and a process to prepare said blend A blend of cellulose acetate and starch acetate used to make fibers, filaments, yarns, fabrics, plastic materials and other uses is disclosed. Additionally, the invention relates to the process of making said blend; cigarette filters made from tow compose... | 08/29/1995 |
| 5150721 | Tobacco smoke filter material and process for production thereof Disclosed is a novel process of preparing tobacco smoke filter material, wherein an acidic compound such as citric acid is dissolved in a cellulose acetate spinning solution prior to spinning the filaments of the filter material.... | 09/29/1992 |
| 5142034 | Cellulose ester compositions and process for the preparation thereof Process for reducing the degree of substitution of cellulose esters employing Lewis acids as solvolysis promoters is disclosed. Novel low degree of substitution cellulose esters produced by the invention process are also described.... | 08/25/1992 |
| 5093488 | Modified chitin for biocompatible dialysis membranes III and process for preparation of modified cellulose and modified chitin for use therewith A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case... | 03/03/1992 |
| 5093489 | Modified chitin for biocompatible dialysis membranes IV and process for preparation of modified cellulose and modified chitin for use therewith A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein Cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case... | 03/03/1992 |
| 5093486 | Modified chitin for biocompatible dialysis membranes II and process for preparation of modified cellulose and modified chitin for use therewith A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is unmodified cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 ... | 03/03/1992 |
| 5008385 | Cellulose derivatives and fibers and membranes made therefrom Cellulose derivatives are disclosed which have the following formula: ##STR1## wherein Z is selected from the group consisting of alkylene, alkenylene, alkynylene, cycloalkylene or benzylene or xylylene radicals, which may or may not be substituted; ... | 04/16/1991 |
| 4997935 | Modified cellulose for biocompatible dialysis membranes III and process for preparation thereof A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R'... | 03/05/1991 |
| 4981959 | Modified cellulose for biocompatible dialysis membranes II and process for preparation thereof A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is unmodified cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of... | 01/01/1991 |
| 4981960 | Modified cellulose for biocompatible dialysis membranes IV and process for preparation thereof A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein Cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R'... | 01/01/1991 |
| 4839113 | Anistropic compositions of cellulose esters; processes for obtaining such compositions; fibers of cellulose esters or cellulose Composition (M) having a base of a cellulose ester having formate groups, this composition being an anisotropic solution containing: (a) the cellulose ester; (b) formic acid; (c) at least one phosphoric acid. A process for obtaining this composition by dissolving t... | 06/13/1989 |
| 4480090 | Process for esterification of cellulose using as the catalyst the combination of sulfuric acid, phosphoric acid and a hindered aliphatic alcohol The present invention relates to a method of preparing lower fatty acid esters of cellulose which comprises esterifying at a temperature of between about 75° C. and about 110° C. a cellulose compound having esterifiable hydroxyl groups with an esterifyi... | 10/30/1984 |
| 4097667 | Hydroxyalkyl cellulose ethers Disclosed is a process for the chemical modification of a water-soluble cellulose ether, which comprises reacting the ether with a chloroformic acid ester in an aqueous organic medium containing alkali hydroxide, whereby the cellulose ether is rendered at... | 06/27/1978 |
