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5286382 |
Hydrophobic polymeric membrane composites
A composite porous membrane is formed from a porous polymeric substrate having its entire surface modified with a cross-linked polymer which results in a hydrophobic and oleophobic surface. The...
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5274047 |
Semipermeable composite membrane, a process for the manufacture thereof, as well as application of such membranes for the separations of components in an organic liquid phase or in the vapor phase
Semipermeable composite membrane, with a porous carrier substrate, whereby said carrier substrate is provided with a polymer network obtained by polycondensation, especially interfacial...
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5269926 |
Supported microporous ceramic membranes
A method for permformation of microporous ceramic membranes onto a porous support includes placing a colloidal suspension of metal or metal oxide particles on one side of the porous support and...
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5268199 |
Alkali corrosion resistant coatings and ceramic foams having superfine open cell structure and method of processing
Alkali corrosion resistant coatings and ceramic foams having superfine open cell structure are created using sol-gel processes. The processes have particular application in creating calcium...
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5262199 |
Coating porous materials with metal oxides and other ceramics by MOCVD
Metal organic chemical vapor deposition (MOCVD) is used to form a layer of a metal oxide on the surfaces and within the pores of a porous ceramic material. The metal oxide is formed from one or...
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5258202 |
Methods of making and using improved microporous hollow fibers, the improved hollow fibers and tube bundles constructed of the improved fibers
The processes of the invention enable depositable PFSA to be provided over he entire inner surface of hollow fibers. Additionally, the processes of this invention provide a fiber which is coated by...
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5256444 |
Method for suppressing dust emissions from bulk solids
Methods and compositions for controlling fugitive dust emissions from bulk granular or powdered solids are disclosed. Fugitive dust emissions are controlled by applying an aqueous, foamed solution...
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5244695 |
Aqueous binder saturants used in a process for making nonwoven filters
A method for making a nonwoven filter which comprises impregnating a nonwoven filter substrate with a curable binder composition, the binder composition consisting essentially of (a) 10 to 100...
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5215790 |
Method for preparation of a microporous structure with layered interstitial surface treatment
A microporous structure with layered interstitial surface treatments, and method and apparatus for preparation thereof. The structure is prepared by sequentially subjecting a uniformly...
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5215692 |
Process for the surface grafting of formed bodies, in particulate also microporous membranes made from nitrogen-containing polymers
Halogen-substitutable hydrogen atoms are linked to nitrogen atoms of a polymer, with ethylenically-unsaturated monomers. By using inorganic or organic hypohalogenites and/or organic N-halogen...
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5215786 |
Composition for providing a foam barrier between a substrate and the atmosphere and the method of use
A composition for forming an essentially biodegradable foam for application to a substrate to provide a barrier between the substrate and the atmosphere formulated from a mixture in water of...
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5204403 |
Moisture permeable and waterproof coated fabric and method for manufacturing same
A water-vapor permeable, waterproof coated fabric having a fibrous base fabric, and a porous film coated on one side of the base fabric. The porous film comprises a synthetic polymer composed...
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5198271 |
Method for producing polyolefin foam sheet
A method for producing a polyolefin foam sheet which includes heating a foamable base sheet comprising a polyolefin resin, a foaming agent, and a resin varnish. The resin of the varnish is selected...
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5194322 |
Coated textile materials
A coated textile material, particularly for use as a durable filter fabric, is made from a textile substrate, such as a woven fabric, having a microporous coating of an elastomeric fluorocarbon...
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5194194 |
Method for molding soft sheet material
A method of molding soft sheet material having a foam layer and a skin layer. In the method, a skin powder is sprinkled on a predetermined area of the foam layer for forming the skin layer. The...
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5194200 |
Method of creating silica ceramic membranes
A method of creating a silica ceramic membrane is disclosed. The method begins with the hydrolyzing of a silicon alkoxide with ammonia until the sol is formed. The sol is dialyzed to approximately...
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5191111 |
Manufacture of isocyanate-substituted isophtholayl chloride
The present invention is directed to a process of preparing isocyanate-substituted isophthaloyl chloride by heating a mixture of amino-substituted isophthalic acid, catalyst, phosgene and...
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5143752 |
Filtering material of apatite and glucan used for surgical masks and method of making it
A filtering material for effectively adsorbing not only conventional foreign material such as dust, odoring gaseous substance but also very fine foreign material such as virus, bacteria, fungus,...
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5133991 |
Method for applying a biodegradable protein foam to a substrate
A method and apparatus for covering substrates such as landfills, sewage, contaminated soil, sludge deposits, compost piles and the like. A protein based solution, preferably mixed from a foam...
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5132171 |
Non-flammable open-cell cross-linked polyolefin foam and method for production thereof
An open-cell cross-linked polyolefin foam possessing extremely high non-flammability is produced by dispersing a thermally expansible graphite in an adhesive agent and applying the resultant...
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5130166 |
Method for reducing the pore size of sintered metal filters by application of an alcoholic solution of a metal alkoxide which is converted to an insoluble hydrous metal oxide
The invention is a process for modifying pore size near the surface of porous materials. The surface is contacted with an alcohol solution of a metal alkoxide which forms a hydrous oxide insoluble...
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5124289 |
Surface treated permeable inorganic membranes and process of making same
A treated permeable inorganic membrane is disclosed comprising a permeable inorganic membrane capable of reacting with an organic acid. The treated membrane has good chemical stability over a pH...
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5118557 |
Foam coating of press fabrics to achieve a controlled void volume
This invention is directed to coating press fabrics to achieve a controlled void volume. More particularly, this invention is directed to a method of modifying a press fabric for a papermaking...
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5116552 |
Process for preparation of dried collagen sponge
A process for preparing a crack-free, dried collagen sponge having a shrinkage factor of up to 14%, including the steps of impregnating crosslinked collagen sponge with an aqueous solution of a...
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5114773 |
Resilient composite open-cell foam structure and method of making same
A carpet underlay cushion structure is provided having a carrier layer of open-cell resilient foam material having an initial thickness, said resilient foam material being substantially completely...
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5112369 |
Method of applying a wettant to a filtering media
A method of applying a wettant to an air laid, non-woven, fibrous filter web or other filter media includes the steps of atomizing the wettant into relatively small particles having a diameter...
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5110520 |
Method for manufacturing a porous static pressure gas bearing
A method of manufacturing a porous static pressure gas bearing includes the steps of impregnating a porous material to be adjusted in injection flow rate with resin and closing vent openings, and...
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5104546 |
Pyrogens separations by ceramic ultrafiltration
The method of the present invention for separating pyrogens includes passing a pyrogen-containing liquid through a zirconium oxide membrane on a ceramic support. The membrane on ceramic support...
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5104693 |
Polyurethane carpet-backing process based on soft segment prepolymers of diphenylmethane diisocyanate (MDI)
Polyurethane-backed substrates such as attached cushion carpeting are prepared from a polyurethane forming composition based on a soft segment prepolymer of MDI or an MDI derivative. The use of the...
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5091434 |
Polyol composition and method for producing a rigid polyurethane foam using the same
The present invention relates to a polyol composition used to produce a rigid polyurethane foam by a spraying method and also to a method for producing a rigid polyurethane by a spraying method...
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5076926 |
Modified membrane
A process is provided for modifying a ceramic ultrafiltration membrane system consisting of a sub-microporous top layer and a microporous inorganic carrier whereby said top layer after modification...
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5071880 |
Process for producing a bifunctional filter membrane having iminodiacetic acid groups
A process for producing a filter membrane capable of simultaneous removal of metallic ions and nonionic materials from process water used in electronics industry, medical field, pharmaceutical...
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5051178 |
Process of producing composite semipermeable membrane
Alkyldiamine, 1,3,5-trihydroxybenzene or 1,3-dihydroxybenzene is added as a copolymerization component to a polyfunctional aromatic amine component in the amount of 1-20% by weight with respect to...
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5043069 |
Filtration device having hardened gum formed-in-place membranes
Stable formed-in-place saccharinic gum membranes on a porous support, the membranes being modified by contact with at least an equivalent of multivalent cations to anionic groups in the gum.
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5041329 |
Vulcanized rubber article and process for the preparation of the same
Disclosed are vulcanized rubber articles of foamed type and non-foamed type which are prepared by vulcanizing a vulcanizable and foamable (or a vulcanizable) molded product made of a chlorinated...
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5030482 |
Filter gasketing
The present invention relates to ceramic foam filters having a gasket material chemically and mechanically bonded thereto. The filters have particular utility in the filtration of molten metal,...
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5004645 |
Barrier products
A porous material, e.g. a paper, has pores with a range of sizes. A pore modifying agent comprising particles of a narrow size range is selectively incorporated within the larger pores to provide...
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5002801 |
Paper machine fabrics having controlled release
This invention is directed to paper machine fabrics having controlled release of chemicals. More particularly, this invention is directed to a method for achieving controlled release of chemicals...
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4990373 |
Membrane-forming foam composition and method
An aqueous foamable membrane-forming composition comprised of a water dispersible polymeric latex, preferably styrene-butadiene latex, and an alkyl ether sulfate surface active agent. The...
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4985280 |
Process for hydrophobization of microbacteria retaining air filter
The invention concerns a process for hydrophobation of materials for microbacteria-retaining air filters which are preferentially used for blood transfusion and therapy by infusions. Fluorocarbons...
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4980235 |
Process for preparing non-porous membrane layers
The invention relates to a process for preparing non-porous membrane layers by applying a solution comprising a solvent and a (e.g. silicon-containing) polymer having a weight-average molecular...
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4968426 |
Fine alpha alumina ultrafiltration membranes
Strong and durable alpha alumina ultrafiltration membranes with effective separating layers having effective pore diameters less than about 50 nm, and particularly at almost any point within the...
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4962073 |
Surface treated porous ceramic membranes and method of making same
A treated permeable inorganic membrane is disclosed comprising a metal oxide/hydroxide capable of reacting with a phosphoric acid ester. The treated membrane has good chemical stability over a pH...
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4957811 |
Components of silicon-infiltrated silicon carbide having a porous surface, and process for the production thereof
For producing a component of silicon-infiltrated silicon carbide, having a porous sliding surface, a component of silicon-infiltrated silicon carbide (composition: 40-95% by weight of SiC, 1-45% by...
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4957890 |
Surface treated permeable inorganic membranes and method of making same
A treated permeable inorganic membrane having good chemical stability over a pH range of from 1 to 14. The monomolecular layer of organic acid material is formed on the membrane surface by...
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4957810 |
Synthetic sponge-type articles having excellent water retention
Articles comprise a body made of hydrophobic synthetic partially open-cell material at least partially covered with a layer of hydrophilic material. The body of each article is characterized by the...
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4944963 |
In situ crosslinking of polyelectrolytes
A composition, useful for forming absorbent articles of a carboxylic polyelectrolyte, is prepared by copolymerizing a carboxylic polyelectrolyte monomer, a reactive self-crosslinking monomer and a...
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4943451 |
Process and device for applying a flowable substance to a surface
In a process and a device for the impregnating and/or coating application of liquid, optionally foamed substances, through a slot the parts of the device performing the application are arranged to...
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4940631 |
Cellular cellulosic wiping material
The invention relates to a cellular cellulosic wiping material consisting of a cellular cellulosic substrate covered on at least one side with an expanded latex foam obtained from an aqueous latex...
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4939180 |
Process of producing a composite membrane
A process for producing a composite membrance in which a sulphonated polymer is appled to the surface of a porous substrate, treating the polymer, in situ, on the substrate with cations of a...
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