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JPH09504331A |
Disclosed is a method for producing a water-swellable, generally water-insoluble modified polysaccharide having improved age-stable absorption properties. The method involves forming a mixture of a modified polysaccharide, water, and, op...
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JPH0910297A |
To release acetic acid in a controlled manner and to accelerate the treatment of a wound by producing a traumatotherapic material from cellulose ester which releases the acetic acid in the controlled manner by hydrolysis upon receipt of ...
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JP2564386B2 |
A water-insoluble polymer powder that can be redispersed in a liquid phase is obtained by proceeding as follows: first prepare a two-phase liquid-liquid system from a concentrated aqueous solution of a solute and a solution of the polyme...
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JP2559683B2 |
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JPH08319301A |
PURPOSE: To obtain a cellulose acetate excellent in transparency, filtering characteristics, spinnability, especially heat stability irrespective of a low-grade pulp as a cellulose raw material. CONSTITUTION: Thus cellulose acetate is a ...
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JP2558089B2 |
To improve the dry strength of paper by adding an organosiloxane- containing starch to a paper stock. An organosiloxane-containing starch derivative represented by the formula (St-o is a starch molecule; R is a 3-12C alcohol, an ether, a...
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JPH08311101A |
To recover an org. acid generated from the manufacture of a cellulose ester. This process comprises the step of removing a weak acid stream 14 comprising an org. acid and water from the manufacture of a cellulose ester; the step of subje...
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JP2549066B2 |
PURPOSE: To provide an industrial scale process for the treatment of cellulose wherein liquid ammonia is used for the high-grade and homogeneous activation of cellulose subsequently to be acetylated without the necessity for cooling at a...
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JPH08509755A |
PCT No. PCT/FI94/00119 Sec. 371 Date Oct. 26, 1994 Sec. 102(e) Date Oct. 26, 1994 PCT Filed Mar. 30, 1994 PCT Pub. No. WO94/22919 PCT Pub. Date Oct. 13, 1994The invention is related to highly substituted, water-insoluble, poorly water-pe...
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JP2542220B2 |
There are disclosed surfactants consisting of esters of bi- or tri-carboxylic hydroxyacids having general formula: wherein: X = H, -CH2COOR; Y = H, OH, on condition that Y=H when X = -CH2COOR; R, R1, R2, which may be the same or differen...
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JP2538323B2 |
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JP2528502B2 |
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JP2525308B2 |
PURPOSE: To obtain spherical porous cellulose particles having high exclusion limit molecular weight and a large particle diameter by forming liquid droplets of a specified mixed solution containing cellulose diacetate and a chlorinated ...
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JP2525497B2 |
A polysaccharide graft polymer having the structure Sacch-O-(-G-)m-(M)n-1-M (I) in which Sacch- is a polysaccharide; m = 0 or 1; G is the residue of a polymerisable unsatd. monomer which is bonded to the polysaccharide by an ether or est...
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JP2510960B2 |
PURPOSE:To provide the title derivative which can produce a tough film excellent in adhesion and weather resistance, and is useful as a silicon acrylic synthetic resin modifier, by opening the ring of epsilon-caprolactone to be polymeriz...
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JP2510665B2 |
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JPH08134101A |
PURPOSE: To produce powdery particles of cellulose ester from a solution thereof in high efficiency and utilize the separated solvent effectively. CONSTITUTION: A cellulose ester solution heated at about 70-200°C is introduced into a ve...
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JPH0870852A |
PURPOSE: To obtain a formed article consisting of cellulose acetate having biodegradability accelerated in an appropriate degree as a biodegradable mate rial by separating a microorganism having deacetylation activity against cellu lose ...
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JPH0859891A |
PURPOSE: To obtain a novel solid compsn. which functions as an absorbent material by crosslinking a polysaccharide (e.g. a cellulosic material or polygalactomannan) with a specific crosslinker. CONSTITUTION: This solid absorbent compsn. ...
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JPH0859701A |
PURPOSE: To obtain the subject derivative which is a polyol resin applicable to a urethane resin, etc., having the biodegradability by previously carrying out the dehydrating and drying treatments of a reactional raw material consisting ...
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JPH08501326A |
Disclosed is a process comprising: A) introducing cellulose and water into an activation zone; B) introducing acetic acid and sulfuric acid into the activation zone; and C) subjecting the cellulose, water, acetic acid and a catalyst to a...
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JPH082992B2 |
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JPH08500137A |
Disclosed is a process for acetylation of cellulose comprising: a) introducing cellulose, water, acetic acid, a catalyst and acetic anhydride into an acetylation zone; b) subjecting the materials within the acetylation zone to an activat...
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JPH0791321B2 |
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JPH07506852A |
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 o...
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JPH07179501A |
PURPOSE: To obtain a material having excellent dimensional stability by containing lignocellulose with an acetylating agent of an acetic anhydride and an acetic acid vapor and then reducing the acetic acid content so as to recover and re...
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JPH07165951A |
PURPOSE: To obtain a biodegradable plastic which is compostable, is excellent in environmental protection, and is useful for disposable goods such as disposable medical tools by subjecting cellulose acetate to ionizing radiation. CONSTIT...
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JPH07504361A |
A catalytic system for the acylation of cellulose comprises the addition product of sulphuric acid and N,N-dimethyl acetamide as well as free sulphuric acid or free N,N-dimethyl acetamide in the following rations by weight (in moles): ad...
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JPH0735401B2 |
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JPH0730202B2 |
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JPH0730203B2 |
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JPH0770201A |
PURPOSE: To obtain an ester of total substitution degree of 1 or more of cellulose, where the hydroxy groups in the specific positions bonding to the glucose units constituting cellulose are esterified and the ester can be formed into fi...
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JPH0770202A |
PURPOSE: To obtain an ester of high biodegradability and high position-selective substitution having the ester groups in the specific positions of the hydroxy groups bonding to the glucose units constituting the cellulose and giving usef...
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JPH075688B2 |
A modified polysaccharide material which comprises: (1) polysaccharide covalently bonded to a synthetic polymer; (2) the synthetic polymer being made from (a) a polymerizable compound which is capable of being covalently coupled directly...
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JPH079411A |
PURPOSE: To increase an acetylating reaction speed by bringing a gaseous acetylating agent into contact with a cellulose-containing material composed of wood pieces increased in surface area so as to provide a relative speed to acetylate...
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JPH0699482B2 |
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JPH06510805A |
Water soluble cellulose acetoacetates prepared by contacting a cellulose material with diketene, an alkyl acetoacetate, 2,2,6-trimethyl-4H-1,3-dioxin-4-one or a mixture thereof in a solvent system comprising lithium chloride plus a carbo...
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JPH06308661A |
PURPOSE: To provide a silver halide photographic sensitive material with a surface layer free from uneven coating and defective adhesion, less liable to bleed at the time of coating or with the lapse of time and not deteriorating its lub...
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JPH0681761B2 |
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JPH0680082B2 |
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JPH0680081B2 |
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JPH06279501A |
PURPOSE: To obtain a new cellulose derivative excellent in weather resistance hydrolysis resistance and solvent solubility. CONSTITUTION: The derivative is represented by formula I [wherein C6H7O5 is a cellulose skeleton of formula II; R...
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JPH06279502A |
PURPOSE: To provide the derivative excellent in weather and resistance hydrolysis resistances and solvent solubility. CONSTITUTION: The production process comprises reacting a carbonate compound of the formula (wherein R is selected from...
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JPH0674351B2 |
Gelled cellulose triacetate products are made by mixing with a solution of the cellulose triacetate an amount of miscible liquid nonsolvent agent insufficient to cause gelling, then cooling the mixture or evaporating the solvent to cause...
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JPH0667961B2 |
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JPH0665681B2 |
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JPH0662681B2 |
The preparation of microcrystalline triacetylcellulose by acid-catalyzed acetylation of microcrystalline cellulose, perfluoroalkanesulfonic acids with 1 to 8 carbon atoms are used as the catalyst, resulting in a non-hazardous process and...
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JPH0655764B2 |
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JPH0655765B2 |
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JPH06199901A |
PURPOSE: To obtain the subject composition capable of readily controlling biodegradability and coping with the fields different in requirement to biodegradation rate by change, etc., of amount of an acid compound, which composition is ob...
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