Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7319114 | Hollow polymer particles, method for preparing hollow polymer particles, porous ceramic filter, and method for preparing porous ceramic filter Hollow polymer particles are provided to have an average particle diameter of 15 μm or more and 500 μm or less and a 10%-compressive strength of 1.5 MPa or more, and the hollow polymer particle includes a hollow portion in the interior. In addition, a porous ceram... | 01/15/2008 |
| 7250201 | Production method of cellulose film, cellulose film, protective film for polarizing plate, optical functional film, polarizing plate, and liquid crystal display A production method of cellulose film wherein cellulose film is produced by preparing a polymer solution through dissolving cellulose ester in a solvent containing a prescribed organic solvent as the main component, forming a filmy object from the prepared polymer s... | 07/31/2007 |
| 7148344 | Method for producing cellulose acetate film Using the dope containing the following cellulose acetate (1), (2), or (3), a film is prepared by the casting process: (1) a cellulose acetate having carboxyl groups binding to at least one member selected from the group consisting... | 12/12/2006 |
| 7122660 | Cellulose acetate and dope containing the same Using the dope containing the following cellulose acetate (1), (2), or (3), a film is prepared by the casting process: (1) a cellulose acetate having carboxyl groups binding to at least one member selected from the group consisting... | 10/17/2006 |
| 6803458 | Cellulose acetates and process for producing the cellulose acetates The present invention provides a cellulose acetate satisfying at least one requirement selected from the following requirements (A), (B) and (C), provided that the case where (B) alone is satisfied is excluded. Requirement (A): Bri... | 10/12/2004 |
| 6683174 | Cellulose triacetates and methods for producing the cellulose triacetates The present invention provides a cellulose triacetate which exhibits a satisfactory filtration performance Thus, the present invention provides a cellulose triacetate whose occlusion constant (K) determined by the following method is 70 or less. Method: t... | 01/27/2004 |
| 5973139 | Carboxylated cellulose esters A process for preparing a carboxylated cellulose ester from oxidized cellulose is described. The carboxylated cellulose esters have improved solvent solubility and coating resin compatibility when compared to cellulose esters made from regular grade cellu... | 10/26/1999 |
| 5962677 | Cellulose acetate with high moldability and process for production thereof Cellulose acetate having a high moldability and low solution viscosity in spite of having a high average degree of polymerization is obtained. The low molecular weight components of cellulose acetate (e.g., CTA having average degree of acetylation of 59.0... | 10/05/1999 |
| 5928613 | Apparatus for acetylating cellulose In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase compo... | 07/27/1999 |
| 5929229 | Direct process for the production of cellulose esters The present invention relates to a process for preparing cellulose esters having a total DS/AGU of 0.1 to 3.0, said process consisting of contacting the following: (i) a cellulose material, (ii) a solubilizing amount of a solvent system comprising a carboxamid... | 07/27/1999 |
| 5914397 | Cellulose acetate excellent in physical strength, and process for production thereof An object of the invention is to obtain cellulose acetate having improved physical properties, particularly film strength and improved flexibility of the molded product. Cellulose acetate having an average degree of acetylation of not less than 59%, visco... | 06/22/1999 |
| 5869646 | Method and apparatus for acetylating cellulose In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase compo... | 02/09/1999 |
| 5821359 | Acetylation of lignocellulosic fibres The invention relates to a process for acetylation of lignocellulosic fibres (LF) using an acetylating agent comprising acetic anhydride at a temperature of above 140° C. and a pressure of 100-150 kPa wherein raw or substantially raw LFs are treated with... | 10/13/1998 |
| 5770726 | Process for preparing a cellllose acetoacetate alkanoates The present invention relates to a process for preparing a substituted cellulose acetoacetate alkanoate without using a carboxamide/lithium chloride solvent system. The process involves contacting cellulose in a carboxylic acid diluent with an acetylating... | 06/23/1998 |
| 5723600 | Method for incorporating cellulose esters into cellulose by immersing cellulose in an acid-dope solution A method for treating cellulose with cellulose ester for use in various paper products involves reacting cellulose and an acid anhydride to form a cellulose ester-carboxylic acid solution. Acetic anhydride may be used as the acid anhydride, and a cellulos... | 03/03/1998 |
| 5667691 | Process for extracting water and acetic acid from the aqueous phase of cellulose acetate A new process has been developed for separating the water and acetic acid present in the aqueous phase contained in cellulose acetate flakes precipitated from esterification solutions of cellulose. The process includes the step of simultaneously extractin... | 09/16/1997 |
| 5608050 | Process for the manufacture of cellulose acetate The specification discloses a process for the manufacture of cellulose acetate. The process reacts, at a temperature suitable for acetylation, an acetic acid activated pretreated cellulose raw material containing 100 parts cellulose by dry weight, and 0.5... | 03/04/1997 |
| 5371207 | Pressure pretreatment for improving the acetylation of cellulose A novel method has been discovered for the pretreatment of cellulose with acetic acid and acetic anhydride under pressure, resulting in uniformly activated cellulose fibers. The improved process for producing cellulose diacetate comprises the steps of: (1... | 12/06/1994 |
| 5364935 | Continuous hydrolysis of cellulose acetate Disclosed is a process comprising continuously flowing a composition through a hydrolysis zone so as to achieve a residence time distribution such that at least 81% of the area under the residence time distribution curve is within plus or minus 50% of the... | 11/15/1994 |
| 5294703 | Process for preparing -D-cellobiose octaacetate Provided is a novel improved process for the preparation of -D-cellobiose octaacetate via the acetylative degradation of cellulose or cellulose acetate. The title compound is provided in high yield and quality in a facile one-pot process, amenable ... | 03/15/1994 |
| 5244945 | Synthesis of plastics from recycled paper and sugar cane A method is provided for preparing a cellulose ester plastic composition from waste paper (e.g. recycled paper) and/or sugar cane bagasse. The paper or bagasse is reacted with an acid anhydride in the presence of a catalyst to esterify some of the hydroxy... | 09/14/1993 |
| 5141006 | 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 (dope) prior to spinning the filaments of the filter material.... | 08/25/1992 |
| 5114535 | Process for the production of cellulose acetate from wood pulp A process for making cellulose acetate from wood pulp takes wet wood pulp and instead of converting it into dry pulp sheet which is the usual feedstock for acetate, dries and mechanically separates the pulp into a cellulose flock using a pin mill through ... | 05/19/1992 |
| 5003056 | Antibiotic NK86-0279, process for production of the same and application of the same This invention relates to an antibiotic NK86-0279 of the formula: ##STR1## which exhibits antifungal, antitumor, vascularizations-inhibitory and insecticidal activities.... | 03/26/1991 |
| 4590266 | Process for preparing cellulose acetate Cellulose acetate is effectively prepared from cellulose and acetic anhydride in a solvent of acetic acid in the presence of a catalyst of sulfuric acid, when the reaction system is being evacuated at least before the reaction mixture reaches a boiling po... | 05/20/1986 |
| 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 |
| 4439605 | Process for producing cellulose acetate A process for producing cellulose diacetate is disclosed which comprises the steps of: (a) pretreating and activating 100 parts by weight of cellulose, adding a mixture of 200 to 400 parts of acetic anhydride, 0 to 350 parts of glacial acetic acid, and 0.... | 03/27/1984 |
| 4336370 | Process for activating cellulose pulp to improve ease of esterification Treatment of dissolving pulp derived from wood with small quantities of C2 -C18 carboxylic acids and subsequent storage of the treated pulp, under conditions where little acid evaporation can occur, for periods of about two hours or ... | 06/22/1982 |
| 4306060 | Process for preparation of cellulose acetate Cellulose acetate is prepared acetylating cellulose at a high temperature of 50°-85° C. and then ripening the acetylated cellulose at a high temperature of 110°-120° C.... | 12/15/1981 |
| 4269972 | Process for producing cellulose diacetate having improved resistance to delustering phenomenon in hot water Cellulose diacetate having improved resistance to delustering in hot water is produced by acetylation cellulose in the presence of a catalyst and then hydrolyzing (or ripening) the product to form secondary cellulose acetate; wherein the catalyst in the a... | 05/26/1981 |
| 4234718 | Process for preparing cellulose acetate Cellulose acetate is produced from methanol, carbon monoxide and cellulose in an integrated series of steps wherein acetic anhydride produced in a first step by the carbonylation of methyl acetate is used to acetylate cellulose to produce cellulose acetat... | 11/18/1980 |
| 4234719 | Preparation of cellulose acetate Cellulose acetate is produced from methanol, carbon monoxide and cellulose in an integrated series of steps wherein acetic anhydride produced in a first step by the carbonylation of methyl acetate is used to acetylate cellulose to produce cellulose acetat... | 11/18/1980 |
