Abstract:
PURPOSE:To facilitate the formation of type I cellulose triacetate, by evaporating a solution of cellulose triacetate in a phenolic solvent to dryness or coagulation. CONSTITUTION:A solution of cellulose triacetate in a phenolic liquid solvent is evaporated to dryness or coagulation. Said cellulose triacetate is one having a weight-average degree of polymerization >=10 and derived by acetylating at least 90% of the hydroxyl groups of the corresponding cellulose. Examples of said phenolic liquids include those of an M.P.
Abstract:
PURPOSE:To enable the manufacture of a composite structure useful as separa tion agent, filler or the like, by supporting polysaccharide on a whole porous carrier with the specified particle diameter and average bore diameter. CONSTITUTION:Polysaccharide is supported on a whole porous carrier with the particle diameter 1mum-1cm, the average bore diameter 10Angstrom -100mum and the ratio of bore diameter and particle size of below 1/10. The polysaccharide shall be cellose, amyloe and the like and the number-average degree of the polysaccharides is set at 5 or more, preferably 10 or more while the holding amount at 1-100 wt.% with respect to the carrier. Chemical and physical methods are available for holding the polysaccharide on the carrier. One of the physical methods is that a saccharide is disolved into a solvent to be mixed with the carrier thoroughly and the solvent is fractioned away in an air current under a reduced pressure and a raised heat. The chemical supporting method is a reactive functional group is added to the carrier and polysaccharide to bond the saccharide to the carrier. This facilitates the manufacture of a composite structure while a wide range of use is expected as it s hard in the nature.
Abstract:
PURPOSE:To obtain an optically active isomer of the titled compound useful as an intermediate for pharmaceuticals, etc., from an inexpensive raw material, economically with simple chromatographic technique without using chemical conversion, by carrying out the optical resolution of the titled compound using a resolving agent containing a polysaccharide as an acitive component. CONSTITUTION:An optically active isomer of the compound of formula I or formula II (R is =85% of the H of the OH is substituted with a 1-3C carboxylic acid, etc.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a cellulose ester, which can give in a short reaction time the cellulose ester little in fine foreign substances consisting mainly of the unreacted cellulose; to provide the cellulose ester manufactured by the above method; and to provide a molded product consisting of the cellulose ester which hardly has optical flaws when having become the molded product, such as a film, with the use of the cellulose ester and which is suited for an optical film, polarizing plate protection film, optical compensation film, optical retardation film and the like. SOLUTION: The cellulose ester is manufactured via the step wherein cellulose is rendered into slurry in water of an amount 1-300 times by mass that of the cellulose and subjected to the activation treatment. This gives the cellulose ester little in the fine foreign substances consisting mainly of the unreacted cellulose. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a composition that comprises a material having excellent affinity with a fragrance component having a herbal green fragrance and being capable of releasing the fragrance component at a low concentration and the fragrance component carried on the material. SOLUTION: The composition comprising a cellulose acetate and either or both of a cis-3-hexanol and a trans-2-hexanal is provided. Preferably, the cellulose acetate is a fibrous material having an average fiber denier diameter of 20 denier or less. Additionally, it is more preferable that the weight of either the cis-3-hexanol or the trans-2-hexanal relative to the cellulose acetate is 0.1 or less and at the same time the weight ratio of the total amount of both the cis-3-hexanol and the trans-2-hexanal relative to the cellulose acetate is 0.1 or less. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a preparation method of a cellulose ester whereby decrease of molecular weight can be suppressed and the amount of bonded sulfuric acid can be reduced without reducing the amount of a sulfuric acid catalyst. SOLUTION: The cellulose ester having a small amount of bonded sulfuric acid is prepared by acylating a cellulose by an acylating agent in the presence of the sulfuric acid catalyst and subsequently performing a maturation step wherein maturation is performed by adding a base (e.g. a calcium component) either continuously or intermittently in several batches (e.g. in three or more batches). This method can reduce the amount of bonded sulfuric acid to about 10-150 ppm and can also reduce calcium content to about 10-110 ppm. The cellulose ester is useful e.g. as an optical film (e.g. a protective film for a polarizing plate). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a cellulose acetate solution where cellulose acetate is dissolved stably in an organic solvent other than halogenated hydrocarbon. SOLUTION: The preparation process of the cellulose acetate solution comprises the steps of: swelling cellulose acetate having an average degree of acetylation of 58.0-62.5% in an organic solvent selected from 3-12C ethers, 4-12C ketones and 3-12C esters containing practically no halogenated hydrocarbon; cooling the swelled mixture to a temperature in the range of -100 to -10°C; heating the cooled mixture to a temperature in the range of 0 to 50°C; and dissolving the cellulose acetate in the organic solvent. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To enable the production of cellulose acetate solution useful for photographic materials, etc., by adopting a somewhat higher cooling temperature practicable by a relative simple treatment in a cooling dissolution method. SOLUTION: A mixture of (A) a cellulose acetate having 58.0-62.5% average acetyl content with (B) an organic solvent is cooled to a temperature (T) defined by formula I [when the average acetyl content (Dac) of the component A is 58.25-6.0%] or formula II (when the Dac is 60.0-62.5%) in a cooling step when dissolving the component A in the component B and providing the objective solution according to the step for cooling the mixture of the components A and B to
Abstract:
PROBLEM TO BE SOLVED: To enable the production of cellulose acetate solution useful for photographic materials, etc., by adopting the highest possible cooling temperature in a cooling dissolution method. SOLUTION: A mixture of (A) a cellulose acetate having 58.25-62.5% average acetyl content with (B) an organic solvent is cooled to a temperature (T) defined by formula I [when the average acetyl content (Dac) of the component A is 58.25-60.0%] or formula II (when the Dac is 60.0-62.5%) in a cooling step when dissolving the component A in the component B and providing the objective solution according to the step for cooling the mixture of the components A and B to
Abstract:
PURPOSE:To excellently separate basic compounds of amines which can be hardly separated from each other by using a mobile phase containing anions containing a plurality of fluorine atoms. CONSTITUTION:The anion which contains a plurality of fluorine atoms is that containing two or more fluorine atoms in one molecule of anion, such as the phosphor hexafluoride ion, arsenic hexafluoride ion, etc. Any mobile phase that can dissolve an ion-pair reagent at a required concentration and does not give any adverse influence to a stationary phase, sample, and chromatography equipment or mobile phase composed mainly of a nonpolar solvent, such as hexane, etc., can be used as the mobile phase to which anions are added. Such mobile phase is suitable for the separation of a mixture containing molecules which can produce anions, because the phase largely changes the intensity of retention in the chromatography of anions, such as amines, or molecules which can produce anions. Moreover, since the mobile phase has a similar structure, the phase can be used for the separation of a hardly separable mixture, such as an optical isomer, etc., containing a polysaccharide derivative as a stationary phase.