952results about How to "Promote swelling" patented technology

A negative type radiation sensitive resin composition comprising: (A) an alkali-soluble resin containing the polymerized unit of a polymerizable unsaturated compound having a phenolic hydroxyl group and having a weight average molecular weight of 4,100 to 20,000 and a weight average molecular weight/number average molecular weight ratio of more than 1.25 to not more than 2.00; (B) a radiation sensitive acid generating agent; and (C) an acid crosslinking agent. This composition can be used with an alkali developer having a normal concentration, can form a high-resolution rectangular line-and-space resist pattern, and provides a chemically amplified negative type resist which is free from a resist pattern defect (bridging or chip line) after development and has excellent sensitivity, developability and dimensional fidelity.

A blend of a semicrystalline polyolefin, a rubbery polymer containing repeat units from norbornene, and a polymeric compatibilizer is disclosed. This composition has reduced oil swell as compared to thermoplastic vulcanizates from a semicrystalline polyolefin and hydrocarbon rubbers.

The present invention relates to an absorbent structure, preferably for use in absorbent articles as used in the personal hygiene industry such as feminine hygiene garments, baby diapers and pants or adult incontinence garments. The present invention also relates to an absorbent article comprising such absorbent structure and to a method of manufacturing the absorbent structure. The absorbent structures comprise a carrier layer, an auxiliary layer and an absorbent material there between wherein substantially permanent primary attachments and substantially temporary secondary attachments join the carrier layer and auxiliary layer at least partially together, whereby the substantially temporary secondary attachments are loosened as a result of exposing the absorbent structure to a liquid whereas the substantially permanent primary attachments remain substantially intact. The present invention foresees in the need for improved flexible, thin, lightweight absorbent structures for an absorbent article which overcomes the absorbency problems of the prior art during absorption, distribution and retention of liquids with optimal fit.

The invention discloses collagen sponge and a preparation method thereof. The collagen sponge does not contain a chemical cross-linking agent, has the porosity of over 90 percent, and is prepared by performing radiation cross-linking on aqueous solution of collagen and then freeze-drying the aqueous solution of collagen; and sterilization is performed during cross-linking so that the biosafety problem caused during preparation is solved. The collagen sponge prepared by the method has no residue of chemical reagents, better biocompatibility and structural uniformity, and adjustable degradation rate and mechanical strength, and can be used as biomedical materials such as dressing, tissue engineering stents, artificial tissue components, tissue fillers, embolic agents and the like.

The present invention provide with a rinse solution for lithography and a resist pattern forming method using the same, which can prevent an inclination and peeling-off of a resist pattern and form a resist pattern having a high aspect ratio with high reproducibility. The rinse solution for lithography of the present invention comprises water and a nonionic surfactant having an ethyleneoxy group but not having a fluorine atom. The resist forming method of the present invention comprises the step of rinsing the pattern after development treatment with the rinse solution for lithography.

A method for joining a resin member and a porous member can prevent peeling in a specified direction. When a thermoplastic laser transmitting resin member and a porous member are joined, the laser transmitting resin layer and the porous member are laminated, and a laser beam is emitted at a side of the laser transmitting resin member. The porous member is heated so that the laser transmitting resin member is melted, and the melted resin is impregnated with holes of the porous member. The resin is cooled so as to solidify.

A waterborne pigmented paper or paperboard coating composition containing as pigment 50% to 100%, by weight based on pigment weight, calcium carbonate and from 1% to 25%, as dry weight based on pigment weight, of an aqueous polymeric dispersion including (a) 95-25% by weight, based on the weight of the solids of the aqueous polymeric dispersion, of a first emulsion polymer having an average particle diameter of 150 to 3000 nanometers and (b) 5-75% by weight, based on the weight of the solids of the aqueous polymeric dispersion, of a second emulsion polymer having an average particle diameter of 40 to 600 nanometers wherein the ratio of the average particle diameter of the first emulsion polymer to the average particle diameter of the second emulsion polymer is from 1.2 to 60, wherein at least the first emulsion polymer particles, when dry, contain at least one void, and wherein the first emulsion polymer is prepared in the presence of the second emulsion polymer or the second emulsion polymer is prepared in the presence of the first emulsion polymer is provided, as is a method for improving the sheet gloss of paper or paperboard coated with the coating composition.

The present invention relates to one kind of environment responding aquogel copolymer and its preparation process. The aquogel consists of: N-isopropyl acrylamide 10-90 wt% and methacrylate dextran derivative 10-90 wt%. The preparation process of the environment responding aquogel copolymer includes chemical modification of dextran with GMA to synthesize methacrylate dextran derivative, MA-Dex, with reaction activity; and subsequent copolymerization of MA-Dex and NIPA to obtain the said environment responding aquogel copolymer P(NIPA-co-MA-Dex). The aquogel copolymer has high temperature sensitivity and quick responding speed as well as high strength and excellent biocompatibility. The preparation process is simple, needs no special apparatus and is easy to realize in industry.

Provided is a method of treating a patient suffering from a pain state by administering to the patient a gastric retentive dosage form of gabapentin that is capable of administration in once-daily or twice daily dosing regimens. By reducing the need to administer gabapentin from the thrice-daily administrations characteristic of immediate release gabapentin, the gastric retentive gabapentin dosage forms provided herein have the advantages of improving patient compliance for gabapentin treatment. In addition to the foregoing, the gastric retentive gabapentin dosages forms also exhibit decreased blood plasma concentrations and increased bioavailability throughout the dosing regimen.

The invention discloses a polymer micro-needle array chip, comprising a substrate and a micro-needle array standing thereon; the material for preparing the micro-needle array is a polyacrylamides polymer, with the molecular weight of 1.0×10⁴-2.0×10⁵, the Vickers hardness of 150-600 HV, and the impact strength of 5-30 J/m. The polymer micro-needle array chip has a high mechanical strength and a sharp needle tip, and it can easily dissolve or swell on contact with a water-containing environment, which helps the drug to be released slowly in the skin.

The present invention relates to oat deeply processing technology, and is especially technological process of producing oat dietary fiber and nutritious powder with oat bran. The technological process includes microwave enzyme deactivation of oat bran, enzymolysis, centrifugal separation, drying the precipitate and superfine crushing to obtain oat dietary fiber powder, vacuum concentrating the separated supernatant and spray drying to obtain nutritious powder. The present invention extracts the nutritious matters from oat bran effectively, the product has high purity and the production process is environment friendly.

An optical compensatory sheet comprises a cellulose ester film, an orientation layer and an optically anisotropic layer formed of liquid crystal molecules in this order. Alignment of the liquid crystal molecules is fixed. An alkaline solution is coated on a surface of the cellulose ester film to saponify the surface. The saponified surface is coated with a coating solution of the orientation layer.

The present invention discloses a preparation method for a chitosan-based porous scaffold with biological activity. According to the present invention, chitosan and inorganic micro/nanoparticles with biological activities are adopted as raw materials to prepare into slurry; a water-soluble aldehyde polysaccharide polymer is adopted as a cross-linking agent; a Schiff base cross-linking process and a freeze drying method are adopted to prepare a class of chitosan-based composite porous scaffold materials with biological activities, wherein porosities, pore sizes, mechanical properties, degradation performances, and bone conductions/bone inductions and the like can be regulated through the formula and the process conditions. According to the present invention, the porous scaffold provided by the present invention does not adopt harmful chemical cross-linking agents, and can not cause adverse effects to cells; with the cross-linked porous structure and a plurality of hydrophilic groups such as amino, carboxyl, hydroxyl and the like, the porous scaffold has high chemical stability in an aqueous phase with a wide pH range (pH range of 5-9), and has outstanding advantages of softness, high elasticity, swelling ratio of 30 times, and the like; the porous scaffold has advantages of imitation of natural bone extracellular microenvironment in aspects of the porous structure, the chemical composition, the surface chemistry and the like.

The invention relates to a preparation method for nano-cellulose. The method comprises the steps of: providing a plant fiber pulp; untwining the plant fiber pulp to separate the plant fiber into single fiber; conducting pre-defiberization treatment on the untwined plant fiber pulp, and simultaneously adding a TEMPO catalytic oxidation system to oxidize the fiber; when the freeness of the plant fiber pulp reaches 150-450ml, separating the oxidized fiber and wastewater; conducting defiberization treatment on the oxidized fiber again to freeness of 50ml and below, thus obtaining defiberized oxidized fiber; and carrying out nanocrystallization treatment on the defiberized oxidized fiber so as to obtain a nano-cellulose solution. The method is easier to realize wastewater separation and recovery of chemicals, at the same time can save pulping energy consumption by 20%-82%, and is easier to obtain nano-cellulose with uniform size and low cost.

The invention provides ultra-porous hydrogel containing natural plant polysaccharide, which is prepared by the steps of dissolving reaction components in water to form a solution after weighing the reaction components according to a certain proportion, adding the natural plant polysaccharide into the solution, and shaking and mixing evenly the natural plant polysaccharide and the solution, wherein the reaction components include, by weight, monomer 0.50-3.00%, distilled water 0.60-4.50%, initiating agent 0.02-0.15%, cross-linking agent 0.03-0.20%, foam stabilizer 0.02-0.18%, foaming agent 0.07-1.00% and the natural plant polysaccharide 0.06-2.00%. The natural plant polysaccharide is introduced into the ultra-porous hydrogel to prepare the ultra-porous hydrogel containing the natural plantpolysaccharide, so that the ultra-porous hydrogel is capable of swelling rapidly in the water, increased in volume and excellent in mechanical strength. Furthermore, the ultra-porous hydrogel containing the natural plant polysaccharide can take advantages of the natural plant polysaccharide completely, and new application fields can be opened up.

The invention relates to a silk nanofiber manufacturing method, and belongs to the technical field of nano material manufacturing. The manufacturing method includes the steps that silk obtained after degumming treatment is transferred to a solution composed of an inorganic salt or weak acid or weak alkali small molecule compound, deionized water and alcohols, after binding force between nano fibrils in the silk is weakened through soaking, the silk solution is transferred to a high-voltage cell crushing machine or an emulsification machine or a pulp refiner or a crushing machine of a high-speed stirring device, and the soaked silk is mechanically crushed to obtain silk nanofibers. A silk nanofiber solution obtained through the method is similar to the shape of hydrogel, the silk nanofibers are obtained through centrifuging or filtering separation, manufacturing time is short, equipment is simple, operation influence factors are few, and control is convenient. The adopted small molecule compound avoids influences of strong acid or strong alkali on the silk nano fibrils, and the crushing machine can be used for quickly manufacturing the silk nanofibers on a large scale.

The invention provides a method for producing a foamed article comprising the steps of: heating a mixture comprising (a) 100 parts by weight of linear saturated polyester, (b) 0.1 to 10 parts by weight of a mixture as a coupling agent of 0 to 100% by weight of a compound having two epoxy groups in the molecule, and 100 to 0% by weight of a compound having two or more epoxy groups, and (c) 0.01 to 5 parts by weight of a metal salt of a carboxylic acid as a coupling reaction catalyst, at a temperature of a melting point of the polyester or more to provide a melt flow rate of 50 g/10 minutes or less and swell of 10 to 200%, whereby a polyester resin is formed; and heating and foaming the polyester resin using a foaming agent . A foamed article useful as cushioning material, heat insulating material, packaging material, food container, and dividers can be produced by increasing the molecular weight, melt viscosity, and swell (degree of swelling) of PET-based polyesters that have relatively low molecular weight and are brittle, especially recovered polyester, that is used as a prepolymer.

The invention relates to a water-based white sealed primer and a preparation method thereof. The water-based white sealed primer comprises the following components in part by weight: 350 to 600 parts of water-based resin and 50 to 100 parts of modified barium metaborate. The water-based white sealed primer provided by the invention has performance of sealing wood tannic acid and has a durable and good sealing effect after construction on the base material containing the tannic acid, nicotine blot and water-based pigment. Water-based white wood coating is coated on the primer, so the water-based white wood coating is not polluted by the pollutants and is not discolored, and the primer has high rubbing property, covering power and corrosion resistance and can prevent wood from being rotten and deteriorated.

The invention provides a methanol gasoline-resistant rubber material. The methanol gasoline resistant swelling capacity of the rubber material is further enhanced on the premise of satisfying the comprehensive performance of rubber. The rubber material is prepared from various materials such as novel fluorine rubber, an acid absorbing agent, a reinforcing filler, a vulcanizing agent, an accelerant, a plasticizing agent and the like. The rubber material specifically comprises the following components in parts by weight: 100 parts of ternary polymerized fluorine rubber (FKM), 5-20 parts of acid absorbing agent, 0.5-5 parts of vulcanizing agent accelerant, 5-80 parts of reinforcing filler, 0-10 parts of plasticizing agent and 1-5 parts of vulcanizing agent. The rubber material has excellent methanol gasoline resistance. An O-shaped sealing ring and a rubber pipe for a fuel system of a vehicle made of the rubber material have high methanol gasoline resistant swelling capacity.

The invention provides a selective water-blocking, oil-permeable and sand-preventing proppant as well as a preparation method and an application thereof. The proppant comprises ceramsite and a hydrophobic and oleophylic resin film coating the surface of the ceramsite, and the selective water-blocking, oil-permeable and sand-preventing proppant comprises loose particles with the dispersion rate larger than or equal to 98%; the particles have the particle size of 0.4-0.8 mm, the sphericity of 0.9-1.0 and the roundness of 0.9-1.0. The selective water-blocking, oil-permeable and sand-preventing proppant can block water in a water-containing oil layer conveniently and effectively and has oil-permeable and sand-preventing functions, so that a large number of underground oil poll resources can be saved. The selective water-blocking, oil-permeable and sand-preventing proppant is applied to water shutoff and sand prevention of oil wells, has sand-producing hollow stratum filling and propping effects of common sand-preventing measures and can well prevent sand; meanwhile, the application process is convenient to operate, simple in technology and high in water-blocking and sand-preventing success rate, causes no pollution to the stratums and does not affect the permeability of the stratums.

The invention relates to a waste polymer modified asphalt composition. The waste polymer modified asphalt composition comprises following components in parts by weight; 60-85 parts of petroleum asphalt, 6-20 parts of a waste polymer material, 1-8 parts of a compatilizer, 1-1.5 parts of SBS, 0.01-0.5 parts of a stabilizing agent, and 1-10 parts of one or more of native asphalt, coal pitch or biological asphalt. The waste polymer modified asphalt composition can well increase high-temperature storage stability of waste polymer material modified asphalt; pre-swelling performance of the polymer material and similar compatibility with asphalt are improved as the compatilizer is added; storage stability of the waste polymer material in asphalt can be improved extremely as a small quantity of SBS and a small quantity of the stabilizing agent are added; producing cost of the composition can be decreased as the native asphalt, coal pitch or biological asphalt replaces a portion of the petroleum asphalt; the prepared modified asphalt is excellent in high-temperature performance and low-temperature ductility; and the preparation method is simple, safe, and convenient for industrial application.

A polymeric hydrogel having a network of a macropores and micropores formed by copolymerizing at least one monomer having at least one double bond and at least one crosslinker having at least two double bonds in the presence of an organic additive forming a hydro-organic system with water, and uses thereof as separation media.