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Patent Searching and Data


Matches 301 - 350 out of 1,485

Document Document Title
WO/1999/055774A1
The application relates to a process for blending a cellulose ester with a functional additive, by: (a) admixing the functional additive with the cellulose ester and a first acid; and (b) contacting the admixture with an aqueous precipit...  
WO/1999/050305A1
An article molded from a cellulose acetate composition containing a composite of a degradation accelerator comprising at least one compound selected from the group consisting of oxyacids of phosphorus, oxyacids of sulfur, oxyacids of nit...  
WO/1999/049124A2
Provided are compounds and methods for modifying a material to change properties of the material, as well as a variety of products obtained using the methods. The material which is modified may be, for example, a carbohydrate, and the mo...  
WO/1999/049125A2
Provided are compounds and methods for modifying a material to change properties of the material, as well as a variety of products obtained using the methods. In one embodiment, a material comprising one or more modifiable functional gro...  
WO/1999/040120A1
A process for preparing a carboxylated cellulose ester from oxidized cellulose is described. The carboxylated cellulose esters have improved solvent solubility and coating resin compatibility when compared to cellulose esters made from r...  
WO/1999/023118A1
The invention relates to the reaction of a polyhydroxy polymer or a derivative thereof with at least one lactone, lactam or one suited carboxylic acid in order to produce a preferably biodegradable polymer resulting in a homogenous melti...  
WO/1999/022599A1
Cellulose is surface-modified by coating and/or acylation with C¿2? to C¿24?, in same cases primarily C¿6? to C¿22?, or more narrowly C¿16? to C¿20?, aliphatic acids, to obtain cellulose esters exhibiting a degree of substitution o...  
WO/1998/049200A1
The invention concerns reactive cellulose, i.e. having in particular a very low degree of crystallinity obtainable with a high degree of purity. Said novel reactive cellulose is particularly used as raw material for making cellulose ethe...  
WO/1998/041543A1
The invention relates to a method for producing cellulose acetate with a DS between 1.5 and 2.9 by reacting cellulose with an acetylation agent. According to said method, the cellulose is reacted with a first acetylation agent using a ba...  
WO/1998/017692A1
This invention describes improvements in or relating to the production of polysaccharide derivatives; more particularly it relates to a method of converting insoluble polysaccharides to a form in which they form part of an anhydrous syst...  
WO/1998/001497A1
The invention relates to various methods for the acetylation of lignocellulosic fibres such as jute, hemp, wood fibre, sisal, tow, straw and the like, and involves the mixing of the lignocellulosic material acetic anhydride in such quant...  
WO1997036037A3
Modified cellulosic fibers are formed by (1) esterifying cellulosic fibers with a 1,2-disubstituted alkene that has at least one carboxylic acid group reactive with cellulosic hydroxyl groups and (2) oxidizing the esterified fibers to fo...  
WO/1997/040074A1
The present invention relates to a process for preparing a substituted cellulose acetoacetate alkanoate without using a carboxamide/lithium chloride solvent system. The process involves contacting cellulose in a carboxylic acid diluent w...  
WO/1997/038016A1
Cellulose esters according to formula (I): [(C6H7O2)(OR)x(OR')y(OH)3-x-y]n are described, where R is hydrophobic, R' is hydrophilic and not phthalyl or trimellityl, which may be designed, by the proper selection of R, R', x, y, and n, to...  
WO/1997/036037A2
Modified cellulosic fibers are formed by (1) esterifying cellulosic fibers with a 1,2-disubstituted alkene that has at least one carboxylic acid group reactive with cellulosic hydroxyl groups and (2) oxidizing the esterified fibers to fo...  
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 ...  
WO/1997/017065A1
Provided are enteric coating compositions which utilize a low viscosity cellulose acetate phthalate polymer as a film former. The cellulose acetate phthalates have an inherent viscosity of about 0.2 to 0.6 dL/g and phthalyl values of fro...  
WO/1997/012917A1
Cellulose microfibrils, in particular for use as a reinforcing filler or structuring agent in composite materials, a method for making same, and composite materials containing said microfibrils, are disclosed. Specifically, said microfib...  
WO/1997/002292A1
A method for preparing a cellulose formate solution from cellulose slabs, particularly high-density slabs, without mechanically destroying said slabs in advance, is disclosed. The slabs are directly dissolved by impregnating the whole sl...  
WO/1996/030413A1
A cellulose acetate which, despite the high average degree of polymerization, has a low solution viscosity and a high moldability.The low-molecular-weight fraction of cellulose acetate (such as CTA having an average degree of acetylation...  
WO/1996/030412A1
Cellulose acetate which can provide moldings improved in the properties, particularly film strength and pliability. The cellulose acetate has an average degree of acetylation of not less than 59 %, a viscosity-average degree of polymeriz...  
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...  
WO/1996/020961A1
The present invention relates to a process for preparing cellulose esters having a total DS/AGU of 0.1 to 3.0, said process consisting of contacting the following: (i) a cellulose material, (ii) a solubilizing amount of a solvent system ...  
WO/1996/020960A1
The present invention relates to a process for preparing cellulose esters having a total DS/AGU of 0.1 to 3.0, said process consisting of contacting the following: (i) a cellulose material, (ii) a solubilizing amount of a solvent system ...  
WO/1996/019526A1
This invention relates to a process for acetylation of lignocellulosic fibres (LF) using an acetylating agent comprising acetic anhydride at a temperature of above 140 �C and a pressure of 100-150 kPa wherein raw or substantially raw L...  
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...  
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 ...  
WO/1996/006864A1
A method is described for the chemical modification of pre-shaped hydrogels in non-aqueous medium. The conditions permit the reaction of highly expanded, porous hydrogel particles, such as spherical beads, using pseudo homogeneous reacti...  
WO/1995/025495A1
Skin wetness is minimized on overnight usage of a disposable absorbent article containing an acquisition and distribution member consisting essentially of C2-C9 polycarboxylic acid crosslinked cellulosic fibers prepared in the presence o...  
WO/1995/025846A1
Individualized, esterified high lignin content cellulosic fibers containing intrafiber C2-C9 polycarboxylic acid ester perform unexpectedly better in absorbent applications than lower lignin content esterified fibers from the same furnish.  
WO/1995/023168A1
This invention relates to a process for the acetylation of lignocellulosic materials (LM) by (a) bringing the LM into intimate contact with an acetylating agent comprising acetic anhydride as the major component at a temperature from 80-...  
WO/1995/011925A1
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...  
WO/1995/004778A1
Disposable plastic articles of manufacture which are fully compostable and resin compounds for making the same are produced by ionizing radiation treatment of normally nondegradable cellulose acetate. The invention resides in and is pred...  
WO/1994/022919A1
The invention is related to highly substituted, water-insoluble, poorly water-permeable fatty acid esters of polysaccharides and compositions comprising said polysaccharides esters suitable for use in hot-melt adhesives and as coatings f...  
WO/1994/014344A1
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 ratios by weight (in moles): add...  
WO1993025584A3  
WO/1994/003497A1
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...  
WO/1994/002539A1
A method is provided for preparing a cellulose ester plastic composition from waste paper (e.g. recycled paper) and/or sugar cane bagasse. The paper or bagasse is reacted with an acid anhydride in the presence of a catalyst to esterify s...  
WO/1993/025584A1
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...  
WO1993025584A2
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...  
WO/1993/024576A1
Provided are novel titania comprising anatase titanium dioxide and sodium, potassium, calcium, magnesium, barium, zinc, or magnesium salts of sulfuric or phosphoric acid. The titania of this invention are useful in the pigmentation of ox...  
WO/1993/014128A1
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 ...  
WO/1993/007176A1
Wax-like materials are disclosed which comprise a polysaccharide backbone substituted (e.g. by esterification) with long carbon chain residues. The polysaccharide may for example be based on a hemicellulose and the long carbon chains pre...  
WO/1993/003064A1
Process for reducing the content of water and acetic acid in the cellulose acetate precipitated from the esterification solutions of cellulose consisting in submitting the precipitated acetate to extraction with a supercritical liquid.  
WO/1993/003063A1
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 solvant system comprising lithium chloride plus a carbo...  
WO/1992/013893A1
A one-step process for preparing cellulose diacetates from processed film having cellulose triacetate as a base. The process involves use of an organic acid such as acetic acid and a solvolysis agent such as an alkanol or water. Hydrogen...  
WO/1992/010787A1
An aqueous coating composition comprises (a) a hydrophilic binder; (b) an ester of cellulose having at least 8 acyl groups per C24 cellulose unit wherein at least a majority of the acyl groups are derived from an aliphatic polycarboxylic...  
WO/1992/010521A1
Cellulose esters of polycarboxylic acids, and their salts, such as the hydrogen cellulose ester of succinic acid, and the potassium salts thereof, are known to be useful in the preparation of conductive layers in composite such as photog...  
WO/1992/004361A1
An improved, solvent-free, two-stage transesterification process for preparing, from a polyol and fatty acid esters of an easily removable alcohol, highly esterified polyol fatty acid polyesters having reduced levels of difatty ketones a...  
WO/1991/016356A1
A process is disclosed for the preparation of low molecular weight, high hydroxyl cellulose esters ideally suited for use in coating applications. The new synthetic procedure involves treating a cellulose polymer with trifluoroacetic aci...  

Matches 301 - 350 out of 1,485