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7604852 |
Cellulose acylate film and process for producing the same, and optical film and image display device using the cellulose acylate film
A process for producing a cellulose acylate film, the process comprising melt-cast filming a composition comprising a cellulose acylate that has a specific acyl substitution degree, and that has a...
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7595392 |
Biodegradable oxidized cellulose esters
The present invention relates to the preparation of a series of oxidized cellulose esters suitable for use as a drug carrier in the development of biodegradable controlled and/or sustained release...
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7413662 |
Preparation and use of sorptive lignocellulosic material for decontamination of fluid and aqueous media
A modified sorptive lignocellulosic fibre material with hydroxyl groups on the lignocellulosic fibres doubly modified by esterification with a combination of monocarboxylic and dicarboxylic acid...
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7189464 |
Cellulose acylate film and producing method thereof
In a multi-layer structure of a cellulose acylate film, the averaged degree of acylation of surface layers is controlled in the range of 0.5 to 2.8 by mixing several sorts of cellulose acylates...
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7148344 |
Method for producing cellulose acetate film
Using the dope containing the following cellulose acetate (1), (2), or (3), a film is prepared by the casting process:
(1) a cellulose acetate having carboxyl groups binding to at least one...
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7122660 |
Cellulose acetate and dope containing the same
Using the dope containing the following cellulose acetate (1), (2), or (3), a film is prepared by the casting process:
(1) a cellulose acetate having carboxyl groups binding to at least one...
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6712896 |
Cellulose ester film, optical film, polarizing plate, optical compensation film and liquid crystal display
A cellulose ester film comprises (a) an ultraviolet absorbent polymer having at least one of repeating units represented by formulae (1) and (2) and repeating units having ultraviolet absorbent...
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RE38435 |
Separating agent
A mixture of chemical substances such as optical isomers, geometrical isomers and polymers having different molecular weight ranges is separated to each ingredient by use of a cellulose derivative...
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6407224 |
Catalytic system for cellulose acylation process for producing said catalytic system, and for its practical application
A catalytic system for cellulose acylation includes an adduct of sulfuric acid with N,N-dimethylacetamide, free sulfuric acid or free N,N-dimethylacetamide with the following mole ratio of the...
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6211358 |
Method for preparing solution of cellulose acylate method for producing cellulose acylate film and cellulose acylate film
A method for preparing a solution of cellulose acylate is disclosed. The method comprises comprising the steps of (1) chilling an organic solvent containing no chlorinated organic solvent at a...
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6184373 |
Method for preparing cellulose acetate fibers
A method for producing an organic cellulose derivative fibrillated fiber includes the steps of mixing a cellulose ester containing stream and a coagulant stream in a first zone of relatively...
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6160111 |
Process for preparing cellulose esters using a sulfonic acid resin catalyst
The present invention relates to a process for preparing cellulose esters having a total DS/AGU of 0.1 to 3.0, said process comprising contacting the following: (i) a cellulose material, (ii)...
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5977346 |
Fatty acid ester of cellulose, cellulose diacetate and processes for the preparation thereof
A fatty acid ester of cellulose having excellent transparency, filterability and spinnability in spite of its high content of mannose and xylose, wherein the total molar content of mannose and...
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5977347 |
Cellulose acetate propionate
Cellulose acetate propionate is a cellulose ester wherein hydroxyl groups of cellulose are substituted with acetyl and propionyl. Cellulose acetate propionate of the present invention has an...
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5976598 |
Physically coated cellulose as low calorie flour replacements
Particulate cellulosic material such as microcrystalline cellulose, α-cellulose, and/or cellulose acylated with C 2 to C 24 aliphatic acids to a degree of substitution of about 0.05 or less, and...
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5973139 |
Carboxylated cellulose esters
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...
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5906852 |
Surface-modified cellulose as low calorie flour replacements
Cellulose is surface-modified by coating and/or acylation with C 2 to C 24 , in some cases primarily C 6 to C 22 , or more narrowly C 16 to C 20 , aliphatic acids, to obtain cellulose esters...
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5856468 |
Cellulose acetate propionate, solution thereof and cellulose acetate propionate film
Cellulose acetate propionate is a cellulose ester wherein hydroxyl groups of cellulose are substituted with acetyl and propionyl. Cellulose acetate propionate of the present invention has an...
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5723151 |
Cellulose acetate phthalate enteric coating compositions
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...
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5723600 |
Method for incorporating cellulose esters into cellulose by immersing cellulose in an acid-dope solution
A method for treating cellulose with cellulose ester for use in various paper products involves reacting cellulose and an acid anhydride to form a cellulose ester-carboxylic acid solution. Acetic...
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5717087 |
Thermoplastic and biodegradable polysaccharide esters/polysaccharide ether esters containing maleic acid addition product groups
The present invention relates to thermoplastic and biodegradable polysaccharide esters/polysaccharide ether esters, which are characterised in that they can be represented by the general structure...
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5674999 |
Process for preparing readily dispersible water-soluble cellulosic polymers
An improved process for surface treating water soluble cellulosic polymers with crosslinking agents to provide products which are more readily dispersible in cold water, and have longer viscosity...
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5637572 |
Use of 4'-iodo-4'-deoxydoxorubicin for the treatment of amyloidosis
The use of 4'-iodo-4'-deoxydoxorubicin and its pharmaceutically acceptable salts in the treatment of amyloidosis is described.
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5523398 |
Cellulose derivatives with a low degree of substitution
The invention is directed to the formation of cellulose derivatives using homogenous phase reaction conditions. Cellulose is dissolved using DMAc/LiCl and a reagent system is added to promote the...
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5521304 |
Cellulose acetoacetate esters
Water soluble or water-dispersible cellulose acetoacetate esters are prepared by contacting a cellulose material with diketene, an alkyl acetoacetate, 2,2,6-trimethyl-4H-1,3-dioxin-4-one or a...
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5488102 |
Polymerisable carbohydrate esters, polymers therefrom and their use
Compounds of formulae I and Ia R--Y--CO--R 3 --CO--O--A (I), R--Y--CO--R 3 --CO--O--CH 2 --A 1 (Ia), wherein R is a radically polymerisable...
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5474765 |
Preparation and use of steroid-polyanionic polymer-based conjugates targeted to vascular endothelial cells
This invention discloses new targeted conjugates for the delivery of a compound, and particularly, a steroid, to vascular endothelial cells. The conjugates comprise two components, preferably...
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5420261 |
Glycosides of 3'-deoxyaquayamycin antibiotics
Two novel glycosides of 3'-deoxyaquayamycin isolated from an antimicrobial complex produced in fermentation under controlled conditions using a biologically pure culture of the microorganism...
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5371211 |
Cellulose esters and salts thereof
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...
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5292876 |
Mixed cellulose esters
Disclosed are novel species of cellulose acetate butyrates and propionates that have significant surface activity. The cellulose acetate butyrate/propionate contains 9-16 wt. % butyryl or...
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5194663 |
Aromatic derivatives of butyric acid, a process for their preparation and their use in cosmetics and in human and veterinary medicine
An aromatic derivative of butyric acid has the formula ##STR1## These aromatic derivatives of butyric acid are useful in human and veterinary medicines as well as in cosmetic compositions.
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5142034 |
Cellulose ester compositions and process for the preparation thereof
Process for reducing the degree of substitution of cellulose esters employing Lewis acids as solvolysis promoters is disclosed. Novel low degree of substitution cellulose esters produced by the...
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5093489 |
Modified chitin for biocompatible dialysis membranes IV and process for preparation of modified cellulose and modified chitin for use therewith
A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein Cell is cellulose or chitin, in each case without hydroxyl...
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5026841 |
Process for the preparation of finely divided porous cellulose particles
Process for the preparation of finely divided porous cellulose in the form of essentially spherical particles by formation of a suspension, in which an organic solution of a cellulose ester of...
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4888420 |
Water soluble cellulose acetate microspheres
Microparticle of cellulose acetate and derivatives thereof characterized by being water soluble, having a large interior void space and having a plurality of open exterior surface pores. These...
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4796973 |
Pellicle structure for transmission of mid ultraviolet light
A freely standing thin pellicle film of cellulose acetate buterate is formed by spinning on a rotating substrate. After forming, the film is lifted off of the substrate and secured to a metallic...
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4760368 |
Moisture sensor
A moisture sensitive material prepared by cross-linking cellulose acetate through at least one selected from the group consisting of compounds containing two or more isocyanate groups; compounds...
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4518433 |
Enteric coating for pharmaceutical dosage forms
The application discloses a process for making a polymeric powder which is readily dispersible in water to provide a composition useful for forming an enteric coating on pharmaceutical dosage forms...
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4480090 |
Process for esterification of cellulose using as the catalyst the combination of sulfuric acid, phosphoric acid and a hindered aliphatic alcohol
The present invention relates to a method of preparing lower fatty acid esters of cellulose which comprises esterifying at a temperature of between about 75° C. and about 110° C. a cellulose...
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4438105 |
4'-Iododerivatives of anthracycline glycosides
Starting from the known 4'-deoxy-4'-iodo-N-trifluoroacetyldaunorubicin, two new anthracycline glycosidic antibiotics, the 4'-deoxy-4'-iodo-daunorubicin and 4'-deoxy-4'-iodo-doxorubicin, have been...
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4404371 |
Carboxymethylcellulose with carbonate bridges and preparation thereof
Cross-linked carboxymethylcellulose with intermolecular carbonate bridges.
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4249000 |
Modified polymers
Polymers from the group consisting of cellulose and its ester and ether derivatives, of polyvinyl alcohol and its ester derivatives, polymers with vinyl esters and homopolymers and copolymers of...
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4166809 |
Cellulose propionate n-butyrate and coating compositions containing same
Cellulose propionate n-butyrate adapted to be mixed with an oil-modified alkyd resin to form a coating composition. The cellulose propionate n-butyrate has unique properties as an ingredient in...
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4056499 |
Degradable polymeric composition
There is disclosed the preparation of a gradable polymeric composition by the chemical modification of a polymeric material such as a polymer or copolymer. The preparation comprises reacting in the...
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4038228 |
Degradable plastic composition containing a transition metal salt of a highly unsaturated organic acid
There is disclosed a novel degradable plastic composition, said composition being degradable in the absence of electromagnetic radiation and consisting essentially of an organic polymer having...
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4035457 |
Nonbiodegradable polymers
A new composition, cellulose acetate-chlorobutyrate pyridinium salt, which has superior biodegradation resistance and polymer membrane forming characteristics and related compositions.
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4013820 |
Universally useable tableting ingredients
Known polymers of a defined class are converted into a universally useable tableting ingredient that provides controlled release of a drug from tablets made with this material. The new material is...
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3894839 |
Process for acylating functional groups bearing active hydrogen with isopropenyl esters of long chain fatty acids
Materials containing an active hydrogen are acylated quickly and easily at low temperatures by reacting them with an in situ acylating agent formed by the reaction of a strong oxy acid and an...
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3870702 |
Cellulose ether compositions useful as enteric coatings
Tetrahydrophthalic acid monoester or hexahydrophthalic acid monoester of a cellulose ether represented by the general formula: R 1 m R 2 n A, wherein R 1 is a hydroxyalkyl radical of three or...
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3622261 |
BUFFERED ALDEHYDE FIXATION COMPOSITION
The process of fixing formaldehyde on cellulose or a cellulose ester with the aid of a carbamate and using glycolic acid in the catalyst system is improved by including a buffering agent....
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