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WO/1998/056826A1 |
Ultra-fine microcrystalline cellulose compositions are disclosed which produce highly stable suspensions and/or dispersions in which substantially all of the microcrystalline cellulose has a particle size not greater than about 0.7 $g(m)...
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WO/1998/049201A1 |
Galactosylated hydroxyalkyl polysaccharides wherein galactose moieties are bound to the hydroxyalkyl polysaccharide by galactosidic bonds, and a process for preparing the galactosylated hydroxyalkyl polysaccharides having the steps: a) p...
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WO/1998/045334A1 |
The invention concerns novel thermoplastic materials which are based on polysaccharide ethers simultaneously substituted by carboxylic acid ester groups and carbamate groups. The invention also concerns mixtures of such derivatives with ...
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WO/1998/033822A1 |
Stable microdispersed polyanhydroglucuronic acid and salts thereof contain in their polymeric chain from 8 to 30 per cent by weight of carboxyl groups, at least 80 per cent by weight of these groups being of the uronic type, at most 5 pe...
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WO/1998/030387A1 |
Cellulosic materials such as cotton fabrics and paper are cross-linked with a composition comprising (A) polymers of ethylenically unsaturated polycarboxylic acid monomers or salts thereof, the monomers having one or more dicarboxylic gr...
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WO/1998/030594A1 |
Treatment of gelatinous bacterial cellulose by breaking up gelatinous cellulose into a micro-fibre form and then evaporating water from the result with application of heat. The evaporation can be achieved by heating to a temperature abov...
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WO/1998/029454A1 |
A solid absorbing agent for water, aqueous solutions and body fluids is produced by cross-linking an ionic, carboxyl-containing polysaccharide derivative in the presence of 10-80 % by weight water (with respect to the polysaccharide deri...
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WO/1998/027117A1 |
A superabsorbent polysaccharide derivative is obtained by oxidation of the polysaccharide to the extent that the derivative contains 0.2-3.0 carboxyl group per monosaccharide unit and cross-linking the oxidised polysaccharide with 0.001-...
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WO/1998/017260A1 |
System for delivery of a biologically active substance into an environment. First and second chambers are separated by a moveable partition. The first chamber includes a polymer gel network which undergoes a volume change in repsonse to ...
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WO/1998/015566A1 |
Methods for producing glycan nitrones comprising reacting glycans with a mono-N-substituted hydroxylamine at pH 6 or greater to form glycan nitrones. Methods for producing glycan derivatives comprising reacting glycan nitrones produced b...
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WO/1998/013545A1 |
A process for preparation of cross-linked cellulosic containing at least 30 wt.% cellulosic fibers and the polyanhydride cross-linked cellulosic products resulting therefrom wherein a cellulosic material is treated with an aqueous soluti...
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WO/1998/012246A1 |
The invention concerns a shaping object having a surface with reactive functions for chemical, biochemical or biological use. Said object can be produced as follows: a) a shaped polymer material is first used as a shaped object, having a...
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WO/1998/011141A1 |
The invention provides sulfated oxidised regenerated cellulose compounds, sulfated alginates, and the salts and hydrates thereof. The compounds are obtained by sulfation of oxidised regenerated cellulose with sulfur trioxide. The inventi...
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WO/1998/006489A1 |
A mechanical and chemically stable immobilizate that is easy to produce and biodegradable is synthesized as a hollow immobilizate with an external sheath of cellulose ether containing cross-linked sulfoalkyl groups, preferably sulfoethyl...
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WO/1998/002464A1 |
A method of producing cellulose carbamate is described in which: (a) cellulose is brought into contact with liquid ammonia at an initial pressure exceeding atmospheric pressure and a temperature of at least about 25 �C, in the presence...
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WO/1998/000446A1 |
The invention provides oligosaccharides having molecular weights in the range 1000 to 50,000 and obtained by partial hydrolysis of oxidized polysaccharides such as oxidized regenerated cellulose (ORC). The oligosaccharides are useful as ...
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WO/1997/049733A1 |
The invention essentially relates to thermally crosslinked polysaccharide derivatives which contained no polymerizable functional groups prior to crosslinking and which are used in particular as support materials for the chromatographic ...
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WO/1997/045452A1 |
A method for preparing bacterial cellulose improved in various properties, such as papermaking adaptability, dispersibility, suspension stability, and viscosity, in a more simple and economical manner. A method for improving the dispersi...
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WO/1997/036933A1 |
A fluorinated cellulosic material prepared by a process of reacting a cellulosic material selected from the group consisting of cellulose materials and lignocellulose materials with at least one fluorine compound selected from among fluo...
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WO/1997/036934A1 |
Fluorinated cellulosic materials prepared by a process of reacting a cellulosic material selected from the group consisting of cellulose materials and lignocellulose materials with at least one fluorine compound selected from among fluor...
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WO/1997/035848A1 |
Amino and/or alkoxy triazines with at least one C1-C10alkyl group which has a vinyl sulphonyl group or a radical promoting the formation of a vinyl sulphonyl group and is also possibly substituted, their use as fixing auxiliaries in the ...
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WO/1997/036052A2 |
Paper products having high initial wet strengths are disclosed. The paper products comprise cellulosic fibers having free aldehyde groups, which fibers are combined with a water-soluble polymer having functional groups that are reacted w...
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WO/1997/032903A1 |
The invention relates to a method for the oxidation of polysaccharides with ozone under the influence of a halogenide-containing catalyst in aqueous medium, wherein, depending on the catalyst and pH, the oxidation can be controlled in th...
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WO/1997/031951A1 |
A process for reducing the viscosity of polysaccharides such as starch by treatment with hydrogen peroxide in the presence of an acylated polysaccharide as an activator is described. The acylated polysaccharide is used in particular in a...
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WO/1997/032075A1 |
The method of the invention involves treating cellulosic vegetable matter (the "Feed Stocks") for the selective recovery of lignin (when present in the feed stock), cellulose and hemicelluloses by: (1) reducing the material to be process...
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WO/1997/025353A1 |
Aromatic amino-cellulose derivatives are prepared by reacting an aromatic amine such as, for example, 1,4 phenylene diamine with tosylcellulose or tresylcellulose. The tosyle or tresyle residues positioned on the C6 of the basic skeleton...
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WO/1997/022627A1 |
An improved process for surface treating water-soluble cellulosic polymers with cross-linking agents to provide products which are more readily dispersible in cold water, and have longer viscosity delay times than can be achieved with po...
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WO/1997/021733A1 |
Disclosed is a water-swellable, water-insoluble sulfonated cellulose having improved absorption properties. One embodiment of the present invention concerns a water-swellable, water-insoluble sulfonated cellulose having an average degree...
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WO/1997/018242A1 |
The present invention relates to a modified cellulose ester containing unsaturated pendant groups which can be prepared by reacting a cellulose ester containing residual hydroxyl groups with, for example, maleic anhydride in acetic acid ...
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WO/1997/015457A1 |
A cellulose polymer network crosslinked with metal ions selected from the group consisting of: Al+3, Zr+4, and Ti+4, the crosslinked cellulose polymer network having incorporated therein a colloidal sol containing metal oxide-hydroxide p...
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WO/1997/013841A1 |
Novel methods for separating and/or purifying biological compositions are provided. The biological compositions comprise a polysaccharide binding peptide and can be synthesized in whole or in part or prepared by recombinant DNA technolog...
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WO/1997/013893A1 |
The invention concerns a method of producing a cellulose product by the amine oxide process, a suspension of cellulose in an aqueous tertiary-amine oxide being converted into a cellulose solution and the cellulose solution shaped and pas...
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WO/1997/005271A1 |
A new microbial cellulose with high water content and process for making the new microbial cellulose utilizes a trough containing a biological medium and a cellulose producing microorganism. A plurality of disks are partly submerged in t...
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WO/1997/004011A1 |
The invention relates to substantially photochemically cross-linked polysaccharide derivatives that do not contain photopolymerisable functional groups prior to the cross-linking, which can be used as carrier materials for the chromatogr...
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WO/1997/002844A1 |
An absorbent cellulose product includes cellulose fibres which are cross-linked by reaction with an effective quantity of one or more water-soluble polymers which are produced in advance, which have an average molecular weight of between...
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WO/1997/002293A1 |
A polycarboxylic acid prepared by the oxidation of a polysaccharide composed of anhydrous glucose units and having a high carboxyl content and a weight-average molecular weight of 2000 or above; or salts thereof. This acid consumes 435 m...
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WO/1996/040082A2 |
System for delivery of a biologically active substance into an environment. First and second chambers are separated by a moveable partition. The first chamber includes a polymer gel network which undergoes a volume change in response to ...
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WO/1996/040970A1 |
An economically viable method for producing sugars using concentrated acid hydrolysis of biomass containing cellulose and hemicellulose is disclosed. The cellulose and hemicellulose in the biomass is first decrystallized and then hydroly...
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WO/1996/029351A1 |
A process for producing polycarboxylic acids or their salts from polysaccharides by oxidation with gaseous nitrogen dioxide/dinitrogen tetroxide with the conversion of at least a part of the primary alcohol groups of the polysaccharides ...
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WO/1996/027615A1 |
The present invention relates to photochemically cross-linked polysaccharide derivatives of general formulae (IA) and (IB), wherein R is a polysaccharide radical in which the OH groups have been esterified as OR' groups or converted into...
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WO/1996/027618A1 |
In order to improve a process for preparing polycarboxylic acid salts by oxidising polysaccharides with nitrogen dioxide/dinitrogen tetroxide, so that at least part of the primary alcohol groups of the polysaccharides may be converted in...
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WO/1996/026220A1 |
Cellulose particles that have cationic groups also on the inside.
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WO/1996/015154A1 |
The invention relates to a cationic polysaccharide, preferably in fibrous form, having superabsorbent characteristics, the polysaccharides being substituted by quaternary ammonium groups and having a ds of at least 0.5, preferably 0.5 to...
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WO/1996/015163A1 |
The invention provides a superabsorbent material which comprises a combination of (1) a cationic superabsorbent in which from 20 to 100 % of the functional groups are in basic form, and (2) a cationic exchanger in which from 50 to 100 % ...
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WO/1996/015137A1 |
The invention relates to an anionic polysaccharide having superabsorbent characteristics, its polysaccharide being substituted by sulphate groups and the polysaccharide being cross-linked to a sufficient extent that it remains insoluble ...
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WO/1996/003439A1 |
The invention concerns a process for preparing polycarboxylic acids or their salts from polysaccharides by oxidization with gaseous nitrogen dioxide/dinitrogen tetroxide by converting at least some of the primary alcohol groups of the po...
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WO/1996/002276A2 |
A cross-linked, responsive polymer gel network comprising polymer chains interconnected by way of a multifunctional cross-linker is described. The polymer chains and cross-linker have a known acceptable toxicological profile (KATP). Path...
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WO/1996/002577A1 |
A responsive gel bead is provided, which includes a polymer in the form selected from the group consisting of individual polymers, polymer blends and interpenetrating polymer networks, which is chemically cross-linked with a bi-functiona...
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WO/1995/032793A1 |
The invention concerns hydrophilic porous membranes made of cross-linked cellulose hydrate, an inexpensive and non-polluting method of producing them and their use. The invention calls for porous membranes made of cellulose hydrate to be...
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WO/1995/026440A1 |
A fiber/binding agent composition comprising: individualized chemically crosslinked high-bulk fibers comprising individualized fibers chemically intra-fiber crosslinked with a crosslinking agent that is a polycarboxylic acid or is select...
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