175 results about "Water uptake" patented technology

Methods and compositions for systemically or locally administering a beneficial agent to a subject are described, and include, for example, implantable elastomeric depot compositions that can be injected into a desired location and which can provide controlled release of a beneficial agent over a prolonged duration of time. The compositions include a biocompatible, elastomeric polymer, a biocompatible solvent having low water miscibility that forms an elastomeric viscous gel with the polymer and limits water uptake by the implant, and a beneficial agent.

Embodiments of the present invention provide various multipolymers and permselective membranes for use with biosensors and other implantable medical devices and prostheses. Embodiments of the present invention may provide structural strength and integrity, and further may control the influx of glucose, oxygen and / or water. Embodiments of the present invention may, for example, minimize or reduce the influx of glucose by minimizing the percentage of hydrophilic segments, which in turn minimizes the percentage of water uptake and the degree of glucose transport.

A skin-contacting adhesive composition is described which has improved initial tack, long-term adhesion, water uptake and translucency characteristics and may be prepared by melt extrusion. Uses of these compositions are also described, for example, their use in wound dressings.

Methods and compositions for systemically or locally administering by implantation a beneficial agent to a subject are described, and include, for example, compositions having burst indices of 8 or less for systemic applications and systems releasing 10% or less of the total dose of beneficial agent in the first 24 hours after implantation for local applications. The compositions include a biocompatible polymer, a biocompatible solvent having low water miscibility that forms a viscous gel with the polymer and limits water uptake by the implant, and a beneficial agent.

Methods and compositions for systemically or locally administering a beneficialagent to a subject are described, and include, for example, depot gel compositions that can be injected into a desired location and which can provide controlled release of a beneficial agent over a prolonged duration of time. The compositions include a biocompatible polymer, a biocompatible solvent having low water miscibility that forms a viscous gel with the polymer and limits water uptake by the implant, and a beneficial agent.

A skin-contacting adhesive composition is described which has improved initial tack, long-term adhesion, water uptake and translucency characteristics and may be prepared by melt extrusion. Uses of these compositions are also described, for example, their use in wound dressings, adhesive cushions, and transdermal drug delivery devices.

Methods and compositions for systemically or locally administering by implantation a beneficial agent to a subject are described, and include, for example, depot gel compositions that can be injected into a desired location and which can provide controlled release of a beneficial agent over a short duration of time. The compositions include a low molecular weight biocompatible polymer, a biocompatible solvent having low water miscibility that forms a viscous gel with the polymer and limits water uptake by the implant, and a beneficial agent.

Methods and compositions for systemically or locally administering a beneficial agent to a subject are described, and include, for example, implantable elastomeric depot compositions that can be injected into a desired location and which can provide controlled release of a beneficial agent over a prolonged duration of time. The compositions include a biocompatible, elastomeric caprolactone copolymer, a biocompatible solvent having low water miscibility that forms an elastomeric viscous gel with the polymer and limits water uptake by the implant, and a beneficial agent.

The present invention relates to a water-swellable material comprising an inherently crosslinked polymer matrix and inorganic solid particles bound therein with a time-dependent swelling behavior that corresponds to a water uptake of at least 7.5 times the inherent weight of the hybrid material within one hour, as well as the applications thereof. The present invention further relates to a method for manufacture of such a water-swellable hybrid material.

The present invention relates to a water-absorbent expansive composition, the application of the water-absorbent expansive composition, water-absorbent expansive material containing the water-absorbent expansive composition and packers made of the water-absorbent expansive material. The water-absorbent expansive composition of the present invention is made of water-absorbent agent, reaction monomer and surfactant. The water-absorbent agent is a naturally hydrophilic polymer or the derivative; the reaction monomer is monomer containing water-absorbent group such as carboxyl, hydroxyl, ether group, aroylamino, sulfonic group, carboxylate group, sulfonate group, quaternary ammonium salt monomer, or hydrophilic vinyl monomer after hydrolysis. The monomer contains double bonds and can be cross-linked with water-absorbent agent. Wherein, the weight content of the water-absorbent agent is 3 portion to 100 portion; the weight content of the reaction monomer is 0 portion to 30 portion; the weight content of the surfactant is 0 portion to 70 portion.

Poly(aryl piperidinium) polymers are provided which have an alkaline-stable cation, piperidinium, introduced into a rigid aromatic polymer backbone free of ether bonds. Hydroxide exchange membranes or hydroxide exchange ionomers formed from these polymers exhibit superior chemical stability, hydroxide conductivity, decreased water uptake, good solubility in selected solvents, and improved mechanical properties in an ambient dry state as compared to conventional hydroxide exchange membranes or ionomers. Hydroxide exchange membrane fuel cells comprising the poly(aryl piperidinium) polymers exhibit enhanced performance and durability at relatively high temperatures.

A thermoplastic molding composition comprising polycarbonate and at least one aromatic formal is disclosed. The formal conforms to The composition that is characterized by its reduced water uptake, is useful especially for the production of optical data carriers, such as compact discs.

A phenolic foam is made by foaming and curing a foamable phenolic resin composition that comprises a phenolic resin, a blowing agent, an acid catalyst and an inorganic filler. The blowing agent comprises an aliphatic hydrocarbon containing from 1 to 8 carbon atoms and the inorganic filler is at least one selected from a metal hydroxide, a metal oxide, a metal carbonate and a metal powder. The phenolic foam has a pH of 5 or more. The phenolic foam has a higher pH value compared with conventional phenolic foam and reduces corrosion risk when in contact with metallic materials. The phenolic foam maintains excellent long-term stable thermal insulation performance, low water uptake and fire resistance performance and by using a hydrocarbon blowing agent, does not harm the environment as an ozone depleting or global warming material.

A composition including a conducting polymer and an ionomer, and an opto-electronic device including the composition are provided. The composition is prepared by doping a conducting polymer with an ionomer which has stabilized association with the conducting polymer backbone, has a low water uptake, has a low content of by-products decomposed by a reaction with electrons, and can physically crosslink with the conducting polymer. Thus, the opto-electronic device including the composition has improved device performance such as device efficiency and lifetime.

The present invention is one kind of water-jetting propulsion system utilizing supercavitation in realizing vapor-liquid two phase propulsion. The water-jetting propulsion system consists of a water uptake chamber, a supercavitation impeller, an impeller chamber, a kinetic energy converter and a shafting. The supercavitation impeller with vanes designed based on Tulin supercavitating foil principle can operate normally under cavitation and supercavitation condition. Both the vapor phase and the liquid phase in the back of the impeller are converted in the kinetic energy converter before being jetted via the thruster to produce thrust in the outlet of the thruster. The kinetic energy converter can guide the flow of both the vapor phase and the liquid phase and convert the rotation kinetic energy of both the vapor phase and the liquid phase in the outlet of the impeller into axial flow kinetic energy without increasing the pressure of the two phase flow. The present invention realizes great power thrusting under cavitation condition.

The invention relates to a boiler wet slag removal system, which comprises a slag extractor and a heat exchanger. The slag extractor is located under the boiler and has a water tank for receiving boiler bottom slag. The heat exchanger includes a heat exchange surface, one side of the heat exchange surface introduces the water in the water tank as the first heat exchange medium, and the other side of the heat exchange surface is the flowing second heat exchange medium to absorb the water in the water tank energy. In one solution of the present invention, the second heat exchange medium can be air, which is provided by the blower or the primary blower of the boiler, and is sent to the air preheater for the boiler together with the cold air of the blower or the primary blower after being heated . In another solution of the present invention, the second heat exchange medium can be condensed water, which is provided by one or more low-pressure heaters of the steam turbine condensate system, and is heated and delivered to one or more low-pressure heaters . In this way, the waste heat of the slag can be recovered, which simplifies the structure of the wet slag removal system and reduces the water consumption.

The invention provides an air cleanser which is prepared by mixing stabilizer, activator, sorbent and slow releaser with the weight ration: stabilizer is 60-88%, activator is 0.1%-8%, sorbent is 5%-18%, slow releaser is 5%-18%. The stabilizer is chlorine dioxide solution, activator is citric acid, sorbent is macromolecular water uptake resin, slow releaser is polyvinyl alcohol. The preparing method is taking out stabilizer, activator, sorbent and slow releaser and putting them into a container, stirring them at the temperature of 16 deg. to 30deg. so as to mix them fully until it forms solid gel article which can make the chlorine dioxide of the air cleanser to volatilize slowly.

This invention provides a family of cation-strung polymers capable of forming membranes having exceptional hydroxide ionic conductivity as well as low water uptake and methods of making the same. The invention also provides for using these cation-strung polymers to manufacture membranes useful in HEMFC fuel cells and other devices such as electrolysis, solar hydrogen generation, redox flow battery, dialysis, reverse osmosis, forward osmosis, pervaporation, ion exchange, sensor, and gas separation.

The invention provides a homocysteine immune colloidal gold test strip and the preparing method thereof. The test strip is strip shaped which comprises water uptake pad (2), nitrocellulose membrane (NC membrane) (3) with specific coating, capturing line (4) on NC film and quality control line (5), glass fiber colloidal gold combined pad (6) labeled by specific antibody with colloidal gold coating, and sample pad (7), which are subsequently combined on bottom plate (1), the glass fiber colloidal gold combined pad (6) is coated with colloidal gold specific antibody which is S adenosine homocysteine (SAH) monoclonal antibody. The test strip provided by the invention is used to can test homocysteine level in serum, and has the merits of easy operation, fast speed, sensitivity, specificity and so on, with good prospects.

The invention relates to an underground micro-irrigation device, and belongs to the technical field of agricultural water-saving irrigation. The underground micro-irrigation device disclosed by the invention comprises a groundbreaking cone and an outer tube, wherein the groundbreaking cone is arranged at the lower end of the outer tube, an advance-retreat rotating rod, a water inlet pipe, a fixator, a soil scraper and an emitter are arranged in the outer tube, the fixator is arranged in the middle of the outer tube, the advance-retreat rotating rod and the water inlet pipe are fixed in the outer tube through the fixator, the soil scraper is arranged on the lower side inside the outer tube, a sliding rail is arranged at the lower part of the outer tube, and the emitter is arranged on the sliding rail. The underground micro-irrigation device disclosed by the invention can satisfy the water demands of crops; due to adoption of underground irrigation, water can be saved, so that the root system of a crop can achieve the best water uptake effect, and the utilization efficiency of water can be improved; the device can be inserted and drawn out randomly as required, and does not need to be pre-buried underground, the position and depth of irrigation can be adjusted, and the emitter has small possibility of being jammed; and the device is convenient to carry, easy to install, good in water-saving effect, and easy to popularize and apply.

A method for in-situ burning of oil slicks on water, including the steps of: 1) providing a plurality of individual floating wicks; 2) positioning the wicks in the oil slick; and 3) igniting the wicks. Additionally, a method for manufacturing floating wicks for use in burning oil spills, including the steps of: 1) providing a wick material having a dry density less than water; 2) applying to the wick material an oleophilic, hydrophobic coating such that the coated wick material has an oil uptake capacity of at least 2 g / g and a water uptake capacity of no greater than 5 g / g; and 3) drying the wick material.

The invention relates to mascara compositions. In one embodiment, it relates to a dye-free and wax-free mascara composition that lasts more than one day when applied to eyelashes, is resistant to water, and does not noticeably thicken eyelashes on application. In another embodiment, it relates to a wax-free mascara composition comprising solid particles of a film-forming acrylic polymer dispersed in a cosmetically acceptable aqueous medium, in which the film-forming acrylic polymer are capable of forming a film having a water-uptake, after immersion for 10 minutes in water at 25° C., of less than 25 wt. %, and wherein the composition has a viscosity, measured at 25° C., at a shear rate of 200 s−1, of from 4 Pa·s to 18 Pa·s. In other embodiments, the invention relates to make-up kits, articles, and methods for making-up and / or coloring human hair, such as eyelashes and / or eyebrows, using these compositions.

This invention relates to a detection mode of SARS virus antibody and a preparing method of the box for rapid diagnosis reagent. The checking method includes that (1) putting antihuman Ig antibody marked by colloidal gold in the carrier, and coating detecting thread made of variant antigen of SARS coronavirus and controlling thread made of antipest IgG antibody in the detecting carrier connecting with the marked one. (2) putting human serum in the marked carrier. The box for rapid diagnosis reagent includes checkerboard marked by variant antibody of SARS coronavirus, which comprises water-absorbing layer of adding-kind edge, detecting layer and water-absorbing layer of water-uptake edge. There is antihuman Ig antibody layer between detecting layer and water-absorbing layer of water-uptake edge, and in the detecting layer there is detecting thread made of variant antigen of SARS coronavirus and controlling thread made of antipest IgG antibody coating.

The invention relates to a modification method for improving the salt tolerance of a crylic acid macromolecule absorbent resin. The modification method which utilizes Alpha-cyclodextrin to improve the salt tolerance of the crylic acid macromolecule absorbent resin is characterized by comprising the following steps: 1) according to the parts of all component raw materials by weight as follows: 15 portions to 40 portions of crylic acid, 5 portions to 18 portions of sodium hydroxide, 0.02 portion to 1 portion of N, N'- methylene bisacrylamide, 0.05 portion to 2 portions of Alpha-cyclodextrin, 0.04 portion to 2 portions of ammonium peroxydisulfate and 15 portions to 54 portions of water, the raw materials are selected; 2) all raw materials are added into a reaction kettle with a water bath, the temperature is risen to 65 DEG C to 80 DEG C and the reaction lasts for 1 hour to 3 hours; 3) stirring in the reaction kettle is stopped and the kettle is allowed to stand for 0.5 hour to 2 hours and reaction mass in the reaction kettle is discharged; and 4) after being dried, the reaction mass is crushed, thus obtaining the modified crylic acid macromolecule absorbent resin. The method can evidently improve the salt tolerance of the crylic acid macromolecule absorbent resin prepared by the method can be evidently improved.

A consumer product composition comprises a consumer product adjunct ingredient, a microcapsule, and deposition polymer disposed on an outer surface of the microcapsule. The deposition polymer has a Water Uptake Value (WUV) of at least about 2 grams per gram, as determined according to the WATER UPTAKE VALUE TEST METHOD. The microcapsule comprises a shell material encapsulating a core material, wherein the shell material comprises a polyacrylate and the core material comprises a benefit agent.

The invention relates to a paper technology, especially for electrolytic capacitor paper manufacturing method. The method includes the following steps: absorbing layer pulping; using paper pulp to manufacture paper; pressure layer pulping; using paper pulp to manufacture paper; compositing absorbing and pressure layers; the pulping degree of the absorbing layer is 12degreeSR-50degreeSR. And it adopts side wave fourdrinier paper machine to copy paper. But the pressure layer respectively is 30degreeSR-98degreeSR and cylinder paper machine. Thus the invention resolves the problem that cross direction water uptake of electrolytic capacitor paper is not very good. And the invention has the advantages of high purity, uniform paper quality, thickness, tightness, and fiber array.

The invention relates to a method for preparing super high water-absorbing resin by resin sodium alginate and hydroxyl acrylate through the process of copolymerization reaction. Said method includes the following steps: firstly, mixing sodium alginate aqueous solution and hydroxyl acrylate aqueous solution according to a certain ratio, then adding quantitative dispersing agent, fully mixing them uniformly, strong stirring them and drop-adding a certain quantity of initiator and cross-linking agent, reactng for several hours, then precipitating and washing so as to obtain the granular resin. Said method is easy to implement, the obtained resin has good biological compatibility, strong water retentivity and absorbability and good salt resistance.