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JPH02212501A |
PURPOSE:To obtain the title derivative having a high fluorine content and improved heat flow properties and processability by introducing a compound of a specified structural formula into a cellulosic material. CONSTITUTION:A cellulose o...
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JPH02211228A |
PURPOSE: To obtain a bicompatble dialysis membrane for hemodialysis having low complement activity by using a mixed polysaccharide ester film of specific constitutional formulas. CONSTITUTION: A compd. which is the mixed polysaccharide e...
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JPH02129236A |
PURPOSE:To provide activity against physiologically active substances to a cellulosic membrane, especially an asymmetrical membrane having excellent characteristics to a fluid by reacting the cellulosic membrane with a specified org. com...
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JPH02124901A |
PURPOSE:To synthesize easily an aimed cellulose deriv. by dissolving a cellulose in a mixed solvent consisting of a specified noncrystallizing agent and an aprotic solvent and introducing a substituent in this soln. CONSTITUTION:An aimed...
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JPH025761B2 |
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 re...
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JPH02361B2 |
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JPH0141654B2 |
Porous, spherical cellulose particles are prepared by suspending in an aqueous medium a solution of a cellulose organic ester in a chlorinated hydrocarbon solvent to form droplets of the solution, evaporating chlorinated hydrocarbon solv...
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JPH0138402B2 |
Novel cellulose ester derivatives having good solubility which are useful for coating agent, thickening agent, protective colloid, etc.; and a method for the preparation of said cellulose ester derivatives wherein cellulose is reacted wi...
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JPH0138401B2 |
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JPH01182301A |
PURPOSE: To obtain a modified cellulose derivative having excellent dispersibility of pigment, providing a low-viscosity composition for forming a coating film, by masking the remaining OH group of a cellulose derivative with a monoisocy...
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JPH0134442B2 |
PURPOSE:To prevent the lump formation of cellulose acetate and improve the recovery of a washing agent, by draining the cellulose acetate containing an extractant, washing the resultant cellulose acetate with a nonsolvent, adding an alka...
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JPH0134441B2 |
PURPOSE:To separate easily cellulose acetate and an extractant, by draining the cellulose acetate consisting the extractant, and washing the resultant cellulose acetate with a monosolvent for the cellulose acetate as a washing agent. CON...
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JPH0129361B2 |
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JPH0128043B2 |
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JPH01133052A |
PURPOSE: To obtain a dustproof mask which exhibits high light transparent to both (i) rays and (g) ray by consisting the title film of cellulose esters and specifying both the transmissivity of light of 365nm and 436nm wavelengths to 98%...
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JPH0113481B2 |
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JPS644532B2 |
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JPS63245401A |
A polymeric compound comprising crosslinked cellulose aminomethanate wherein 0.5 to 30 numerical percent of the cellulose hydroxy groups have been substituted with aminomethanate groups, each of the crosslinks being formed by a crosslink...
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JPS6330321B2 |
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JPS6323801B2 |
A concentrator including a vacuum evaporator having a cylindrical upper part and a lower part in the form of an inverted cone. A pipe for introducing a feedstock solution is installed with a downwardly opening end thereof positioned in s...
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JPS6321681B2 |
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JPS6312850B2 |
A mixture of chemical substances such as optical isomers, geometrical isomers and polymers having different molecular weight ranges is separated to each ingredient by use of a cellulose derivative having an aromatic ring in the chromatog...
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JPS6328409A |
In a process for concentrating an aqueous solution of an alcohol by pervaporation technique, that is by conducting the alcoholic solution onto one side (14a) of a semipermeable membrane (20) located in an enclosed space (14) and by remov...
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JPS6258601B2 |
An alkali-soluble cellulose derivative is produced by treating cellulose with liquid ammonia having urea dissolved therein, removing the ammonia, resulting in cellulose having urea distributed therethrough, and heating the thus obtained ...
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JPS6254321B2 |
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JPS6254132B2 |
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JPS62253601A |
PURPOSE: To obtain the titled particles especially suitable as chromatography carrier, having uniform particle size and high sphericity, by bringing a cellulose derivative existing as liquid droplets into contact with an aqueous medium c...
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JPS62502550A |
The present invention provides a novel cellulosic material and a process for preparing the same. The cellulosic material is a carboxylated cellulose ester material having an acid number of at least about 5, an inherent viscosity of from ...
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JPS61255901A |
Preparation of a starch ester having an m̅n̅ of 1000-50 000 and a degree of substitution of 0,4-3,0, by heating a mixture of starch, a C1-7 monocarboxylic acid, water, and optionally a catalyst and meanwhile withdrawing water until the...
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JPS6146001B2 |
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JPS6129961B2 |
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JPS61136535A |
Ethylenically unsaturated cellulose esters are provided. These ethylenically unsaturated cellulose esters are the reaction product of a cellulose ester having unreacted hydroxyl groups and a polymerizable ethylenically unsaturated compou...
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JPS61129031A |
PURPOSE: To easily prevent the generation of a gel, by introducing cellulose acetate and its solvent into a pressure vessel to hermetically close said vessel, and heating and stirring both of them under pressure at temp. equal to or more...
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JPS61123601A |
PURPOSE: To produce cellulose acetate useful as a carrier of perfume, deodorant, etc., efficiently, by heating an aqueous solution containing solid cellulose acetate in dispersed state and filtering the solution. CONSTITUTION: An aqueous...
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JPS6121961B2 |
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...
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JPS6058214B2 |
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JPS60223803A |
PURPOSE: The titled derivative soluble in organic solvents and useful as an adsorbent, enzyme carrier, chromatographic carrier, liquid crystal substance, or the like, prepared by substituting specified groups for more than half of the hy...
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JPS60210628A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS6024932B2 |
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JPS6023773B2 |
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JPS6017442B2 |
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 a...
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JPS6017441B2 |
Secondary cellulose acetate (cellulose diacetate) of improved whiteness is produced by ripening primary cellulose acetate (cellulose triacetate) using a lower aliphatic alcohol instead of an aqueous medium.
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JPS609041B2 |
In the method of making low molecular weight cellulose ethers and esters by contacting such ethers or esters of higher molecular weight with HCl or other hydrogen halide gas, yellowing of the depolymerized or degraded product is inhibite...
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JPS604841B2 |
In the production of a solution of cellulose acetate by esterifying cellulose with acetic anhydride in acetic acid, the improvement which comprises using as the cellulose source wood pulp which has been only partially purified but still ...
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JPS591089B2 |
A process for preparing a carboxylated cellulose ion-exchange material comprises heating a mixture of cellulose and citric, isocitric or aconitic acid at 100-160° C while continuously removing water, and then treating the product with a...
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JPS5843401B2 |
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JPS5823408B2 |
Unique gelled cellulose triacetate products, for example, in film or fiber form, prepared by: providing a solution of cellulose triacetate in an acidic nonhydrolyzing solvent; forming the solution into a desired product, such as film or ...
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JPS5820961B1 |
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JPS5758364B2 |
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JPS5755721B2 |
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