65results about How to "Easily degradable" patented technology

This invention relates to biocompatible, biodegradable thermoplastic polyurethane or polyurethane / ureas comprising isocyanate, polyol and a conventional chain extender and / or a chain extender having a hydrolysable linking group and their use in tissue engineering and repair applications, particularly as stents and stent coating.

The specification discloses a polymer blend especially well-suited for coating paperboard substrates used in food packaging, particularly acidic or acid-generating foods such as fruit and vegetable juices. The blend contains an acid-activatable oxygen scavenger dispersed in a film-forming synthetic polymer such as an EVOH copolymer. When placed as a film or layer on the side of the substrate inside the container in contact with the food the blend is effective to reduce the oxygen in the container over time to a very low concentration, replacing the same with carbon dioxide, for an excellent preservative effect.

This invention relates to biocompatible, biodegradable thermoplastic polyurethane or polyurethane / ureas comprising isocyanate, polyol and a conventional chain extender and / or a chain extender having a hydrolysable linking group and their use in tissue engineering and repair applications, particularly as stents and stent coating.

The invention relates to the separation of lanthanides and actinides by nanofiltration complexation. The object of the invention is to satisfy the existing need for a simple, efficient and economical technique for separating lanthanides and actinides. This object is achieved by a process consisting of using ligands of the polyamino acid type, such as EDTA or DTPA, for complexing lanthanides and / or actinides before separating them by nanofiltration. The invention further relates to novel polyamino acid ligands incorporating ligand structures additional to EDTA and DTPA. Application to the production of rare earths or nuclear waste processing, especially to recycling operations carried out on spent nuclear fuels is also discussed.

A subterranean fracturing fluid, which is relatively harmless to both the environment and subterranean formations includes an amphoteric surfactant, specifically a betaine surfactant and an organic electrolyte or an alcohol in an aqueous medium. Depending upon the proportions of the ingredients, the fluid can be foamed.

The invention discloses an amphoteric-cellulose-based composite material and application thereof. Quaternary ammonium-sulfonic acid cellulose serves as a carrier, grapheme oxide and chitosan are loaded in a blending manner, binding force among the three is utilized, and a quaternary ammonium-sulfonic acid cellulose / grapheme oxide / chitosan composite porous material is obtained through freeze drying. The quaternary ammonium-sulfonic acid cellulose / grapheme oxide / chitosan composite porous material comprises, by weight, 5-8 parts of quaternary ammonium-sulfonic acid cellulose, 0.5-3 parts of grapheme oxide and 0.5-3 parts of chitosan, is safe, non-poisonous and good in biocompatibility and degradability, has an orderly three-dimensional porous structure, good mechanical strength and efficient adsorption capability, can be used for water absorption and oil removal and processing of heavy metal ion waste water and organic waste water, and hopefully serves as a filtering material such as an air purification material and a medical adsorption material for use.

The pH value of excess sludge taken out from a biological oxidation tank (2) is adjusted to 8 to 14, and the pH-adjusted sludge is injected into a solubilizing device (3). The sludge taken out from the solubilizing device (3) is heated to 110° C. to 350° C. at a pressure higher than saturated steam pressure to solubilize the sludge to a state readily degradable by microorganisms. The solubilized sludge is returned to a biological oxidizing tank (2), and the pH value of the sludge in the biological oxidizing tank (2) to 5 to 9. The use of the above method of treating excess sludge and an apparatus therefore enables substantially reducing the volume of excess sludge with economic advantage.

Biocompatible crosslinked polymers, and methods for their preparation and use, are disclosed in which the biocompatible crosslinked polymers are formed from water soluble precursors having electrophilic and nucleophilic functional groups capable of reacting and crosslinking in situ. Methods for making the resulting biocompatible crosslinked polymers biodegradable, or not, are provided, as are methods for controlling the rate of degradation. The crosslinking reactions may be carried out in situ on organs or tissues or outside the body. Applications for such biocompatible crosslinked polymers and their precursors include controlled delivery of drugs, prevention of post-operative adhesions, coating of medical devices such as vascular grafts, wound dressings and surgical sealants. Visualization agents may be included with the crosslinked polymers. Embodiments that include hydrogels having isolated hydrolytically degradable esters are set forth. Embodiments including the use of low molecular weight amines to make degradable hydrogels are also set forth.

A system and method for processing solid waste disposal includes a hydrolyzer (80) and a injection assembly (30) for transferring waste to the hydrolyzer (80). The injection assembly (30) includes a sleeve (40), in which waste is compressed with a ram (37), and a movable gate (52), which opens to allow the compressed waste (68) to exit the sleeve (40) and enter the hydrolyzer (80). The hydrolyzer (80) includes a pressure vessel (84), a rotating shaft (108) contained within the vessel (84), and agitates attached to the shaft for moving and processing the material through the hydrolyzer (80).

A method for production of fine microcapsules which encapsulate a hydrophilic bioactive substance at a high content and can be used in wide range of applications such as foods and medical drugs, which method enabling efficient industrial production, is provided. A method for production of S / O type microcapsules including the steps of: (1) emulsifying and dispersing a mixture of a solid fat and an aqueous solution containing a hydrophilic bioactive substance at a temperature of at least the melting point of the solid fat to obtain a W / O emulsion; (2) removing moisture in the W / O emulsion at a temperature of at least the melting point and lower than the boiling point of the solid fat to obtain an S / O suspension; (3) adding the S / O suspension into an aqueous phase containing at least one selected from a surfactant (B), a thickening agent and a hydrophilic organic solvent, and permitting liquid droplet dispersion at a temperature of at least the melting point and lower than the boiling point of the solid fat to obtain an S / O / W emulsion; and (4) cooling the S / O / W emulsion to lower than the melting point of the solid fat to harden the solid fat, and further removing the moisture at a temperature lower than the melting point of the solid fat.

A stock shape for a downhole tool component includes a magnesium alloy including a phase containing 70 to 95 wt. % of magnesium in which 0 wt. % or more and less than 0.3 wt. % of a rare earth metal, a metal material other than the magnesium and the rare earth metal, and 0.1 to 20 wt. % of a degradation accelerator are distributed, and the stock shape has an average particle size of the metal material of 1 to 300 μm, tensile strength of 200 to 500 MPa, and a degradation rate in a 2% potassium chloride aqueous solution at 93° C. of not less than 20 mg / cm2 and not greater than 20000 mg / cm2 per day. Accordingly, a downhole tool having high strength and being readily degradable is established.

An inkjet recording ink comprising an aqueous medium having dissolved or dispersed therein a magenta dye selected from azo dyes, wherein the magenta dye is a dye having an oxidation potential more positive than 1.0 V (vs SCE) and at the same time, a water-miscible organic solvent having a vapor pressure of 2,000 Pa or less at 20° C. is contained; and an inkjet recording method using the ink. By virtue of such a constitution, an inkjet recording ink and an inkjet recording method are provided, which can ensure high ejection stability, good color hue of the obtained image, no drying of the ink at the ink jet head, excellent fastness to light and water, image quality free from defective such as fineline bleeding under high-humidity condition, and good preservability of the image under severe conditions, and furthermore can ensure high storability and high ejection stability even after aging for a long time or under severe conditions.

The present invention relates to the inclusion of additives in a filter element comprising a non-woven sheet material or paper as the filter material to increase the selective removal of semi-volatile compounds and to improve the taste characteristics of the smoke drawn through the filter element. The increased selective removal of semi-volatile compounds from the smoke being drawn through the filter element is provided by polyethylene glycol. TEC and / or triacetin are additives which have been found to improve the taste characteristics of smoke drawn through the filter element.

An inkjet recording ink comprising an aqueous medium having dissolved or dispersed therein a dye having a specific property or structure, and containing at least one antiseptic is provided, which can ensure excellent ejection stability and color hue even after long-term aging of the ink and exhibit excellent weather resistance.

A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst.

The invention discloses a plastic cup and a processing method thereof, belonging to the technical field of a plastic product. The plastic cup consists of the following raw materials in parts by weight: 50-65 parts of polylactic acid, 10-18 parts of polycarbonate butanediol, 8-14 parts of polypropylene, 5-12 parts of chitosan fiber, 7-15 parts of sweet potato starch, 5-10 parts of light calcium carbonate, 3-9 parts of wollastonite, 2-5 parts of zinc oxide, 2-5 parts of aluminum hydroxide, 1-4 parts of stearic acid and 0-3 parts of a foaming agent. Polylactic acid and polycarbonate butanediol are taken as the main raw materials of the plastic cup disclosed by the invention; the plastic cup is characterized by easiness in degradation; the light calcium carbonate, wollastonite, zinc oxide and aluminum hydroxide are added for improving the strength and toughness of the plastic cup; the raw materials of the plastic cup are easily available, pure natural, safe and environmentally friendly; the preparation method is simple, the raw material cost is low and the requirement for mechanical equipment is low; the plastic cup is easy for large-scale popularization and application and has excellent economic benefits.

A product carrying and storage device that comprises a bag with handles and a bag topper device with handle openings in which contents are placed into the bag and the topper device is then guided onto the handles of the bag to protect and insulate the interior contents.

An additive for thermoplastic materials is prepared to achieve controlled degradation and the manufacturing of very light coloured thermoplastics. The thermoplastics may be processed by film blowing, extrusion and injection molding. A ferric(III) salt is reacted with a C2o-C24 fatty acid or derivative under formation of a fat-soluble ferric (III) compound in a process where a suitable oxidizing agent ensures that all the iron in the end product is maintained in the ferric state.

An inkjet recording ink including an aqueous medium having dissolved or dispersed therein a magenta dye selected from azo dyes, wherein the magenta dye is a dye having an oxidation potential more positive than 1.0 V (vs SCE) and at the same time, a water-miscible organic solvent having a vapor pressure of 2,000 Pa or less at 20° C. is contained; and an inkjet recording method using the ink.By virtue of such a constitution, an inkjet recording ink and an inkjet recording method are provided, which can ensure high ejection stability, good color hue of the obtained image, no drying of the ink at the ink jet head, excellent fastness to light and water, image quality free from defective such as fineline bleeding under high-humidity condition, and good preservability of the image under severe conditions, and furthermore can ensure high storability and high ejection stability even after aging for a long time or under severe conditions.

A method for making wooden straws from a solid wood stick includes a step of providing a solid wood stick; a step of clamping the solid wood stick by a molding set, and two ends of the solid wood stick protruding beyond the molding set, and a step of drilling an axial passage through the solid wood stick by at least one machining unit to form a wooden straw. The wooden straws are bio-degradable and durable. The wooden straws do not affect beverage taste and can be manufactured in mass production. The molding set for making the wooden straws includes two dies and each die includes a groove. The solid wood stick is accommodated in the two respective grooves. At least one machining unit is used to drill an axial passage through the solid wood stick to form the wooden straw.

The invention discloses a method for enhancing high-quality gelatin yield, which comprises the following steps: regulating the pH value of a colloidal liquid obtained by a pretreatment process, adding biological proteinase by stages to perform colloidal extraction, adding a bamboo charcoal-chitosan composite into the obtained colloidal liquid to perform adsorption filtration, bleaching and sterilizing with hydrogen peroxide, carrying out impurity removal and concentrating by a membrane process, and finally, drying with a flat plate to obtain the gelatin finished product. The stage-by-stage enzyme addition and colloidal extraction are adopted to completely hydrolyze collagens, so that the gelatin yield is greatly enhanced; and the bamboo charcoal-chitosan composite adsorption filtration, H2O2 treatment, membrane-process impurity removal and concentration and other steps are performed to obtain the high-viscosity high-jelling-power gelatin product.

The invention discloses a coated controlled-release fertilizer for modifying urea into an easily degradable film and a production method of the coated controlled-release fertilizer. The method comprises the following steps: heating common urea into a molten-state urea liquid, and uniformly mixing the molten-state urea liquid with a modifier and a curing agent; directly spraying the mixture on the surfaces of fertilizer particles for curing, reacting and forming a film, thereby obtaining a urea-modified coated controlled-release fertilizer which has smooth and dense film material surface and different water resistances. The product has excellent moisture controlled-release performance, the film material is low in cost, the film shell remained in soil is rapidly degraded, and the fertilizer belongs to the coated controlled-release fertilizer of which the film shell is easily degraded. In addition, the product is low in production cost, simple and convenient in production process flow and suitable for large-scale industrial production and popularization and application in gardening and field crops.

Provided is a hydrogel which comprises water as the main component at a high water content and has mechanical strength suitable for practical use and which exhibits high transparency and self-healing and shape-retaining properties. Also provided are both a material for the hydrogel and a novel polyionic dendrimer. A polyionic dendrimer which comprises a hydrophilic linear polymer as the core and polyester dendrons attached to both terminals of the linear polymer and in which cationic groups are bonded to the surfaces of the dendrons, said cationic groups being selected from the group consisting of guanidine group, thiourea group, and isothiourea group; a material for a hydrogel, which comprises the polyionic dendrimer and clay; and a hydrogel prepared using the material.

The invention discloses a modified brine workover fluid and a preparation method thereof, belonging to the technical field of workover fluids for workover during oil-gas field development. The modified brine workover fluid comprises brine, a modifier for preventing brine from fouling, a salt-resistant plugging agent, a tackfying-suspending agent, a unidirectional pressure sealing agent for a drilling fluid and oil-soluble resin. The salt-resistant plugging agent is prepared from the raw materials by mass: 100 parts of water, 8 to 12 parts of natural starch, 0.8 to 2 parts of pregelatinized starch, 1 to 3 parts of sodium tetraborate and 0.7 to 1 part of sodium chloride. The tackifying-suspending agent comprises the following components by mass: 99.0% to 99.5% of hydroxymethyl starch, 0.3% to 0.8% of N,N'-methylenebisacrylamide and 0.1% to 0.2% of thiosulfate. The modified brine workover fluid has the advantages of good plugging effect, a wide plugging range, high salt resistance, easy degradability, etc.

The present invention relates to a polypeptide, or a fragment thereof, capable of enhancing callose biosynthesis and / or accumulation, wherein at least one of the conserved amino acid residues selected from the group consisting of residue corresponding to R84 of SEQ ID NO: 1, residue corresponding to R1926 or SEQ ID NO: 1 and residue corresponding to P189 of SEQ ID NO: 1, of the polypeptide or a fragment thereof, is modified by a mutation selected from the group consisting of substitution and deletion.

A stock shape for a downhole tool component includes a magnesium alloy including a phase containing 70 to 95 wt. % of magnesium in which 0 wt. % or more and less than 0.3 wt. % of a rare earth metal, a metal material other than the magnesium and the rare earth metal, and 0.1 to 20 wt. % of a degradation accelerator are distributed, and the stock shape has an average particle size of the metal material of 1 to 300 μm, tensile strength of 200 to 500 MPa, and a degradation rate in a 2% potassium chloride aqueous solution at 93° C. of not less than 20 mg / cm2 and not greater than 20000 mg / cm2 per day. Accordingly, a downhole tool having high strength and being readily degradable is established.

The invention discloses a waterproof and flame-retardant corrugated box, which is made of waterproof and flame-retardant corrugated paper. The corrugated paper includes a base paper and a functional coating coated on the surface of the base paper. The base paper is modified by impregnating liquid; the corrugated paper The production process of the box is as follows: the first step, immerse the base paper in the impregnation solution, and dry it after ultrasonic; the second step, evenly coat the coating on the surface of the impregnated base paper, cure, and process it with corrugated rollers; the third step, nail box. In the present invention, the base paper is treated by impregnating the impregnating liquid, and the active ingredients in the impregnating liquid have a strong binding force with the fibers of the base paper, which can not only give full play to the flame retardant performance, but also form a cross-linked network structure to improve the mechanical properties of the base paper ; After being coated with functional coatings, the corrugated paper has good waterproof performance; moreover, the impregnating liquid and the raw materials of functional coatings are all environmentally friendly raw materials, and the base paper itself is made of ordinary wood. Therefore, the obtained corrugated paper is easy to degrade characteristics, in line with environmental protection requirements.