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7402668 |
Process of preparing alkylhydroxyalkylcellulose
A process of preparing alkylhydroxyalkylcellulose (e.g., methylhydroxyethylcellulose and methylhydroxypropylcellulose) by reaction of cellulose in the presence of alkali metal hydroxide with an...
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7049436 |
Carbon dioxide compatible non-aqueous crosslinked fracturing fluids and methods for their use
Alcohol based hydraulic fracturing fluids useful for treating oil and gas wells are disclosed. The fluids are compatible with carbon dioxide, and comprise an alcohol, a polymer, a crosslinking...
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7005515 |
Process for preparing alkyl hydroxyalkyl cellulose ethers
The process for preparing an alkyl hydroxyalkyl cellulose ether comprises the steps of: a) alkalizing cellulose to obtain alkali cellulose, b) reacting alkali cellulose with an alkyl halogenide...
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6958393 |
Cellulose derivatives having gel-like rheological properties and process for the preparation thereof
A description is given of cellulose derivatives having gel-like rheological properties in aqueous solution characterized in that:
a) cellulose is alkalized with aqueous alkali metal...
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6943247 |
Building material compositions
Described is a building material composition prepared from or having added thereto a particulate material selected from particulate polysaccharides or particulate polysaccharide derivatives. The...
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6939961 |
Method for the production of low-viscous water soluble cellulose ethers
A process for preparing low-viscosity water-soluble cellulose ethers by the oxidative decomposition of higher-viscosity cellulose ethers with hydrogen peroxide is described. The process involves:...
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6933381 |
Method of preparing modified cellulose ether
Process for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their...
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6891034 |
Process for preparing alkylhydroxyalkyl cellulose
Described is a process of preparing alkylhydroxyalkyl cellulose, e.g., methylhydroxypropyl cellulose (MHPC). The process includes: (a) alkylating cellulose with an aqueous caustic solution...
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6872820 |
Finely divided polysaccharide derivatives
Finely divided polysacharide derivatives are described. The finely divided polysacharide derivatives are prepared by a process comprising: a) forming an aqueous composition comprising a...
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6843845 |
Admixture and extrudable hydraulic composition
An admixture comprising (A) a nonionic water-soluble hydroxyethyl cellulose and/or hydroxyethyl ethyl cellulose having a viscosity of at least 500 mPa·s as measured in a 1 wt % aqueous solution at...
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6669863 |
Anionic cellulose ethers having temperature-dependent associative properties
An anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with one or more reagents A selected from the group consisting of haloacetic acids, alkali metal...
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6627751 |
Hydrophobically modified anionic cellulose ethers
A hydrophobically modified anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with at least three alkylating reagents A, B, and C. Reagent A is selected...
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6602994 |
Derivatized microfibrillar polysaccharide
A method for producing derivatized microfibrillar polysaccharide, including but not limited to cellulose, derivatized by steric and/or electrostatic forces, where the electrostatic forces are...
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6600033 |
Modified cellulose ethers
The invention relates to a cellulose ether that is hydrophobically modified with an alkyl or alkenylketene dimer of general formula (I), in which R 1 and R 2 are alkyl or alkenyl chain, such...
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6593468 |
Essentially fiber-free cellulose ether with improved water retention, method for the production and use thereof
This invention relates to a process for producing a substantially fiber-free carboxymethyl cellulose which predominantly exhibits elastic properties, to the use thereof as a superabsorbent...
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6562961 |
Aminoalkyl trialkyl silyl cellulose and a method for coating surfaces
The invention relates to polysaccharide derivatives comprising a) at least one hydrophobic and b) at least one nitrogen-containing substituent; in particular, the derivative is a cellulose ether...
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6531593 |
Method for production of cellulose derivatives and the resulting products
Cellulose derivatives are formed by first crosslinking cellulose and subsequently reacting the crosslinked cellulose with a reagent capable of forming a cellulose ether or ester. Many crosslinking...
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6372902 |
Process for preparing polysaccharides with alkyl-aryl hydrophobes and latex compositions containing same
Polysaccharides, including hydroxyethyl cellulose, having alkyl-aryl hydrophobic substitution, provide latex compositions, such as paints, with improved rheology and stability. Improved processes...
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6372901 |
Polysaccharides with alkyl-aryl hydrophobes and latex compositions containing same
Polysaccharides, including hydroxyethyl cellulose, having alkyl-aryl hydrophobic substitution, provide latex compositions, such as paints, with improved rheology and stability. Improved processes...
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6320043 |
Process for preparing fine-particle polysaccharide derivatives
The invention relates to a new, particularly economic process for preparing pulverulent polysaccharide derivatives, in particular cellulose derivatives, having a thermal flocculation point; the...
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6261218 |
Process and apparatus for making low molecular weight cellulose ethers
There is a process for making a cellulose ether. The process comprises the following: a) alkalyzing a cellulose pulp; b) etherifying the alkalyzed cellulose pulp to form a cellulose ether; c)...
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6248880 |
Nonionic cellulose ether with improve thickening properties
The present invention relates to associative cellulose ethers with improved thickening effects, especially in paint. The improvement depends on the presence of a hydrophobic modifying group of the...
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6111011 |
Cellulose ethers containing butenyl groups and use thereof as protective colloids in polymerizations
Water-soluble, nonionic cellulose ethers selected from the group consisting of alkylcelluloses and hydroxyalkylcelluloses which are additionally substituted by butenyl groups are used as protective...
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6054511 |
High solids low viscosity polysaccharides
Hydroxyethylcellulose (HEC), hydrophobically modified hydroxyethylcellulose (HMHEC), hydroxypropylcellulose (HPC), methylhydroxypropylcellulose (MHPC), carboxymethylhydroxyethylcellulose (CMHEC),...
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5898072 |
Aqueous suspension of a cellulose ether, method for the production thereof, and composition
The invention concerns an aqueous suspension of a non-ionic, water-soluble cellulose ether cross-linked with glyoxal, in the presence of an electrolytic salt which gives a pH value below 8.0 in...
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5837864 |
Method for producing a suspension in water of a cellulose ether, and dry mixture suitable for use in the production of the suspension
In a method of producing a suspension of a nonionic cellulose ether that has no turbidity point, the water forming part of the suspension is mixed with a dry mixture containing a cellulose ether,...
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5827835 |
Thermally-gelling emulsions
Thermally gelling emulsion compositions which reversibly increase in either loss modulus or storage modulus, or both, upon contact with the eye, skin, mucous membrane or body cavity are disclosed....
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5814141 |
Liquid crystalline cellulose (ether) ethers as interferentially effective chromophoric substances
The invention relates to a liquid crystalline, photo cross-linkable main-chain polymer used as interferentially effective, chromophoric substance for colored paints, in which the main mesogenic...
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5808052 |
Use of cellulose mixed ethers as additives for earth pressure shields
The present invention relates to water-soluble, particularly ternary, preferably ionic, cellulose mixed ethers, more particularly to anionic water-soluble cellulose mixed ethers, as additives for...
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5804166 |
Low VOC hair sprays containing cellulose ethers
Disclosed are hair spray compositions containing non-ionic cellulosic ethers in a solvent base containing water and volatile organic solvent wherein the level of volatile organic solvent in the...
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5670137 |
Anhydrous dentifrice composition
The invention concerns a dentifrice composition containing, in an anhydrous medium which comprises glycerin, at least one hydroxyethylcellulose having at least one hydrophobic chain, and at least...
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5612321 |
Antioxidant grafted polysaccharides
Grafted polysaccharide compositions comprising polysaccharides grafted with antioxidants on at least one hydroxyl group of the polysaccharide. The use of antioxidant grafted polysaccharides or...
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5591844 |
Alkyl hydroxyalkyl cellulose ethers containing sulfoalkyl groups
The present invention relates to alkyl hydroxyalkyl cellulose ethers which contain a sulfoalkyl group as a further substituent, to a process for the preparation of these cellulose ethers and to...
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5589589 |
Process for screening cellulose ethers
A process and apparatus for screening cellulose ethers which have a finely fibrous or wad-like or woolly structure, wherein the process comprises the following steps: a) applying the cellulose...
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5583214 |
Dual functional cellulosic additives for latex compositions
Cellulose ether derivatives comprising a hydrophobic substituent having an unsaturated alkyl portion are disclosed. The unsaturation in the alkyl portion of the hydrophobic substituent can promote...
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5466390 |
Liquid cleaning products
Substantially non-aqueous liquid cleaning compositions comprise a non-aqueous liquid phase, which liquid phase comprises an alkylpolyglucoside partial ether. Specific novel alkylpolyglucoside...
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5463037 |
Process for producing mixed cellulose ether
A process for producing a mixed cellulose ether comprising reacting a starting cellulose ether with an etherifying agent is disclosed, wherein said starting cellulose ether comprises at least 18...
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5455341 |
Highly substituted carboxymethyl sulfoethyl cellulose ethers (CMSEC), a process for their production and their use in textile printing
The invention relates to certain highly substituted carboxymethyl sulfoethyl cellulose ethers (CMSEC), to a simplified and economic process for their production and to their use as thickeners in...
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5442054 |
Highly substituted sulphoalkycellulose derivatives, especially sulphoethycellulose ether, a process for their preparation and their use as thickening agent for textile printing pastes
The present invention relates to sulphoalkylcellulose derivatives, in particular sulphoethylcellulose, with a degree of substitution by sulphoethyl groups of 1.2 to 2.0 using a one- to three-step,...
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5426182 |
Polysaccharides containing complex hydrophobic groups
Polysaccharides, including hydroxyethyl cellulose, having complex hydrophobic group substitution, provide latex compositions, such as paints, with improved rheology and stability. Improved...
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RE34904 |
Alkylaryl hydrophobically modified cellulose ethers
Cellulose ethers are disclosed which have sufficient nonionic substitution to render them water soluble and which are further modified with a C 10 to C 24 long chain alkylaryl group in an amount...
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5385607 |
Water-soluble sulphoalkyl hydroxyalkyl derivatives of cellulose and their use in gypsum- and cement-containing compounds
The invention relates to a new class of water-soluble ionic cellulose derivatives and their use as additive for gypsum- and cement-containing compounds.
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5358561 |
Use of water-soluble sulphoalkyl derivatives of cellulose in gypsum-and cement-containing compounds
The invention relates to water-soluble ionic cellulose derivatives and their use as additives for gypsum- and cement-containing compounds.
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5302196 |
Modified cellulose ethers and the use thereof in dispersion paints
The invention relates to water-soluble cellulose ethers, containing at least one fluorine-free radical attached via an ether link and selected from the group hydroxyethyl, hydroxypropyl, methyl,...
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5294702 |
Water-soluble polymerizable 3-allyloxy-2-hydroxypropylether of cellulose
This invention relates to water-soluble polymerisable 3-allyloxy-2-hydroxypropylethers of cellulose and to a process for their preparation.
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5278304 |
Water-soluble sulfoethyl cellulose ethers of very high solution quality and a process for their production
The invention relates to water-soluble sulfoethyl cellulose ethers, more particularly methyl sulfoethyl cellulose ether (MSEC), of very high solution quality, to a process for its production and to...
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5218107 |
Removal of undesirable material from water-soluble cellulose ether aqueous solutions
This invention is a process of removing water-soluble impurities from a water-soluble cellulose ether aqueous solution containing such water-soluble impurities comprising treating an aqueous...
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5196527 |
Porous ion-exchanged fine cellulose particles, method for production thereof, and affinity carrier
This invention relates to ion-exchanged fine cellulose particles, porous fine cellulose particles which can be advantageously used as an affinity carrier, and methods of production thereof. These...
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5182380 |
Dihydroxypropyl sulphoethyl celluloses, their preparation and their use
Water-soluble, reversibly gelable cellulose ethers containing sulphoethyl groups (DS-sulphoethyl) and dihydroxpropyl groups (MS-dihydroxypropyl).
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5177199 |
Water-soluble hydroxypropyl sulfoethyl cellulose derivatives (HPSEC) having a low degree of substitution and a process for their production
Water-soluble hydroxypropyl sulfoethyl cellulose derivatives having an average degree of substitution (DS) with sulfoethyl groups of <0.3 and a molar degree of substitution (MS) with...
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