70 results about "Reduced viscosity" patented technology

The invention discloses a carboxymethyl chitosan-based composite gel composition and a preparation method thereof, and relates to the field of gel compositions.The carboxymethyl chitosan-based composite gel composition is formed by taking carboxymethyl chitosan as a base material, an organic amine compound which contains amido and the amido is not completely shielded by hydrophobic groups is added into a second solution, and the carboxymethyl chitosan-based composite gel composition is obtained. A stable salt dispersion liquid is formed after a neutralization reaction is performed until the pH is 6.5-8.0, the stable salt dispersion liquid is mixed with the first solution to form the composite gel, the composite gel composition prepared by matching the specific process with the raw materials can keep relatively stable viscosity after radiation sterilization, compared with conventional gel, the viscosity change rate of the composite gel after radiation sterilization is reduced, and the stability of the composite gel is improved. The quality and the using effect of the product are more favorably maintained, and the method is particularly suitable for being applied to pharmaceutical preparations, medical instruments or hygienic products and the like.

The invention provides polyimide and a preparation method thereof. The preparation method comprises the following steps: adding a sodium hydroxide aqueous solution into a monomer solution containing a dianhydride monomer and an aprotic solvent, mixing, adding diisocyanate, carrying out a polymerization reaction to obtain a reaction product system, and precipitating from the reaction product system to obtain polyimide, wherein the feeding time of the diisocyanate is 4 to 5 hours; in the monomer solution, the molar concentration of the dianhydride monomer is 0.5-0.6 mol / L; the obtained polyimide has the advantages of high specific concentration viscosity, high molecular weight and excellent high temperature resistance.

The present invention aims to provide a polyphenylene ether having excellent solubility in a general-purpose ketone-based solvent and a production method thereof. It also aims to provide a thermosetting composition, a prepreg, and a laminate each using the polyphenylene ether. The polyphenylene ether of the present invention is characterized by containing 5 to 85 mol% of repeating units derived from a phenol of formula (1) and 15 to 95 mol% of repeating units derived from a phenol of formula (2) relative to 100 mol% of the total of the repeating units derived from the phenol of formula (1) and the repeating units derived from the phenol of formula (2), and having a specific viscosity (ηsp / c) of 0.03 to 0.30 dL / g measured in a 0.5 g / dL concentration chloroform solution at 30°C.

The invention belongs to the technical field of conductive materials, and particularly discloses a thixotropic adjustable conductive material carrier and a preparation method thereof. Carbon nanotube acidification, silver nanowire silanization and polymer matrix compounding are optimized through a multi-stage mixing process, and the conductive material with high stability and low resistivity is prepared. The preparation method specifically comprises the following steps: acidifying carbon nanotubes with mixed acid, silanizing AgNW with KH550, carrying out ultrasonic dispersion with a TPU solution and an epoxy resin solution, adding MMT / PVP, carrying out shear mixing, and finally introducing the TPU solution and epoxidized soybean oil (ESO) for secondary mixing. The obtained conductive material carrier is low in resistivity and good in stability, the viscosity is remarkably reduced at a high shear rate, and the conductive material carrier has excellent conductivity, processability and long-term stability and is suitable for the fields of flexible electronics, sensors and the like.

The purpose of the present invention is to provide a production method with which it is possible to obtain a low-viscosity polyphenylene ether while controlling the reaction activity during polyphenylene ether production.　In order to solve the aforementioned problem, the present invention is characterized by comprising a step for introducing an oxygen-containing gas into a solution that contains a phenol represented by formula (1) and a phenol represented by formula (2) and performing oxidative polymerization, the moisture content of the oxygen-containing gas being 0.2-50 mg / L, and the reduced viscosity (ηsp / c) of the resulting polyphenylene ether measured by using a chloroform solution having a concentration of 0.5 g / dL at 30°C being 0.03-0.30 dL / g.

The present disclosure generally relates to high viscosity glyoxalated polyacrylamide (GPAM) compositions, methods of preparation, and methods of use thereof, particularly in the paper industry. Moreover, the present disclosure generally pertains to high molecular weight, high final viscosity, and high final reduced viscosity cationic GPAM compositions, methods of preparation, and methods of use thereof in papermaking applications and in paper-based products, wherein the cationic GPAM compositions may provide increased drainage rates and increased tensile strength to the paper-based products. Such cationic GPAM compositions also contain at least one base polymer with an ultra-high molecular weight backbone and high GPAM standard viscosity (SV).

Provided are a compostable copolyester ether having excellent heat resistance and hydrolysis resistance, and a molded article thereof. This copolyester ether consists of a polyester component composed mainly of a dicarboxylic acid component and an aliphatic diol component and a polyether component composed mainly of polyethylene glycol, and is characterized in that the reduced viscosity of the copolyester ether is 0.5-2.0 dL / g, the main component of the dicarboxylic acid component is 2,5-furandicarboxylic acid, and the aliphatic diol component contains one or more components selected from the group consisting of ethylene glycol, 1,3-propanediol, and 1,4-butanediol. The molded article is mainly composed of the copolyester ether and is any of a fiber, a film, and a bottle.

The purpose of the present invention is to provide a polyester resin which has excellent storage stability and is capable of forming dense crosslinking while having a high reduced viscosity.　The polyester resin comprises 2.0 mol% or more of a tricarboxylic acid component with respect to all polycarboxylic acid components as100 mol%, the polyester resin being characterized in that the reduced viscosity of the polyester resin is 0.50 dl / g or more, the acid value (AV) of the polyester resin is 150 eq / t or more, and a ratio I(1785) / I(1715) between peak intensity I(1715) of absorbance at 1715 cm-1 and peak intensity I(1785) of absorbance at 1785 cm-1 measured by Fourier transform infrared spectroscopy (FTIR) is 0.030 or less.

The application discloses a method for preventing and controlling edge water, and relates to the field of oil reservoir development, which comprises the following steps: controlling the difference between the edge pressure of a target oil reservoir and the formation pressure value within a preset difference range; performing heating and dispersing operations on self-produced super-thick oil of the target oil reservoir, so that the viscosity of the self-produced super-thick oil is reduced to a preset viscosity; injecting the self-produced super-thick oil with reduced viscosity into an edge water control area, so that the injection protection layer reaches a preset thickness; injecting self-produced sewage of a joint station into the protection layer; and injecting a preset volume of air into the protection layer.

The application relates to the technical field of concrete, and particularly discloses early-strength and viscosity-reducing low-water-binder-ratio concrete and a preparation method thereof. The early-strength and viscosity-reducing low-water-binder-ratio concrete comprises cementitious materials, aggregates, water and an additive, the additive comprises hydroxyethyl ethylene bis-stearamide, propoxy glycerol triacrylate and ethoxy polyether modified siloxane, and the mass ratio of water to the cementitious materials is less than or equal to 0.35. The three components of the additive synergistically act on each other, the early-strength component promotes hydration, the viscosity-reducing component reduces friction, and the synergistic component stabilizes adsorption, so that the problem that the early-strength and viscosity-reducing functions of general additives added in low-water-binder-ratio concrete are mutually restricted and the compatibility of the components is poor is solved.

Metal-containing ionic liquids can demonstrate a sharply increased viscosity relative to the same ionic liquids without the metal cation. Metal-containing ionic liquid compositions are disclosed that contain viscosity modifiers that reduce viscosity. Metal-containing ionic liquids are applicable to methods and within systems designed for the purpose of removing and recovering certain components of process streams such as ethylene, isobutane, or both. Methods for removing and recovering ethylene from process streams are also disclosed herein as having increased ethylene removal capacity concurrently with reductions in viscosity without corresponding reductions in metal cation concentrations.

The present disclosure relates to genetically modified host cells exhibiting reduced viscosity when cultured and uses thereof for production of bioproducts. The present disclosure provides genetically modified host cell comprising one or more genetic modifications that result in the downregulation of: (a) spaA or a homolog thereof, and (b) ptaB or a homolog thereof.

The present invention relates to a fungal strain with reduced viscosity, wherein the ID78713 (GEL3) gene has been disabled. The invention also relates to different uses of the strain and methods for genetic modification.

The present application provides a surface treatment agent having excellent antithrombogenicity and biocompatibility, and high hydrophilicity compared with conventional medical materials. The present application is an antithrombogenic material comprising a (meth)acrylate copolymer containing a hydrophobic (meth)acrylate and a hydrophilic (meth)acrylate, the hydrophobic (meth)acrylate being a silicone (meth)acrylate and / or a (meth)acrylic acid alkyl ester, the (meth)acrylate copolymer having a residual monomer amount of 4,000 ppm or less, an inherent viscosity (ηsp / c) of 0.18 dl / g or more and 3.00 dl / g or less, the (meth)acrylate copolymer being water-insoluble, and being a viscous liquid at room temperature.

This invention discloses a lubricated, flow-guided gearbox for new energy vehicles, relating to the field of gearbox technology. It includes a gearbox body with a rotatable connecting shaft inside, and a gear body mounted on the connecting shaft. Power transmission is achieved through the meshing of gear bodies of varying diameters. A lubrication mechanism is internally installed within each gear body, continuously lubricating the meshing surfaces of the gear bodies by discharging stored lubricant. In this lubricated, flow-guided gearbox for new energy vehicles, when the overall temperature rises due to prolonged meshing and friction of the gear bodies, the viscosity of the lubricant decreases. At this time, the deformation baffle expands due to heat, obstructing and turbulent the flow of the lubricant, slowing its outflow speed, and preventing the reduced viscosity lubricant from splashing directly off the gear meshing surfaces under strong centrifugal force. This effectively improves the utilization rate of the lubricant under high-temperature operating conditions, reduces lubricant waste, and ensures the lubrication effect on the gear meshing surfaces under high-temperature and high-speed operating conditions.

The purpose of the present invention is to provide a polyester resin capable of forming dense crosslinking while having a high reduced viscosity.　The polyester resin is characterized in that the reduced viscosity of the polyester resin is 0.50 dl / g or more, the acid value (AV) of the polyester resin is 150 eq / t or more, and the acid value (AV2) of carboxy groups belonging to a tricarboxylic acid component in which two carboxy groups form ester bonds and one carboxy group exists in the state of a free carboxy group is 50 eq / t or more.

An object of the present invention is to provide a polyester resin containing a polyvalent carboxylic acid having a furan backbone and ethylene glycol, the polyester resin having a sufficient molecular weight and achieving both improvement of a crystallization rate and excellent thermal stability. The polyester resin of the present invention is a polyvalent carboxylic acid component and a polyhydric alcohol component as constituent components, wherein the polyester resin satisfies the following (1) to (4): (1) the polyester resin contains a polyvalent carboxylic acid having a furan backbone as the polyvalent carboxylic acid component, and contains ethylene glycol as the polyhydric alcohol component; (2) when measured through differential scanning calorimetry (DSC) at a heating rate of 10°C / minute, a cold crystallization peak temperature of the polyester resin during first heating is within a range of 145 to 185°C and a heat generation amount of the polyester resin during the first heating is 3 J / g or more; (3) a reduced viscosity of the polyester resin is 0.50 dl / g or more; and (4) the polyester resin contains at least one type of metal element selected from antimony, aluminum, titanium, and germanium, and a total content of the metal element is 350 ppm by mass or less.

The present invention relates to denture adhesive compositions having a reduced viscosity facilitating ease of application and use, particularly for older adults or consumers having limited hand movement or strength. Despite a reduced viscosity, the compositions exhibit hold (adhesion over time) and other characteristics comparable with commercially available formulations.

To provide a method for producing a conductive polymer dispersion having a reduced increase in viscosity during storage and good conductivity after drying and curing and to provide a method for manufacturing a conductive laminate and a capacitor using the same.SOLUTION: There is provided a method for producing a conductive polymer dispersion, which comprises a step in which a polymerization reaction is started by adding a polymerization initiator for polymerizing a monomer for forming a π-conjugated conductive polymer into a reaction liquid containing a polyanion, the monomer and a water-based dispersion medium to form a conductive composite containing the π-conjugated conductive polymer and the polyanion, wherein the sulfate ion concentration contained in the reaction liquid immediately before adding the polymerization initiator is less than 1180 ppm.SELECTED DRAWING: None

Lubricating oil compositions having reduced viscosity and improved fuel economy comprising: (50) to (99) wt% at least one Group III, III+, and / or IV base oils; 0.1 to (15) wt% functionalized olefin copolymer having an Mn of from 10,000 to 35,000 g / mol; 0.1 to (20) wt% one or more detergents comprising at least one calcium detergent having a TBN of more than 100 mg KOH / g; at least one calcium detergent having a TBN of 100 mg KOH / g or less; and at least one magnesium detergent, where the difference in the TBN's for the Ca detergents is at least 100 mg KOH / g; 0.01 to (40) wt% one or more dispersants comprising at least one borated dispersant and at least one non-borated dispersant; 0.01 to (20) wt% odsulfurized fatty acid ester; 0.01 to (5) wt% one or more amine or phenol based antioxidants; and 0.001 to (15) wt% molybdenum-containing compound.

The purpose of the present invention is to provide a polyester resin which has excellent thermal stability and is capable of forming dense crosslinking while having a high reduced viscosity.　The polyester resin comprises 2.0 mol% or more of a tricarboxylic acid component with respect to all polycarboxylic acid components as 100 mol%, the polyester resin being characterized in that the reduced viscosity of the polyester resin is 0.50 dl / g or more, the acid value (AV) of the polyester resin is 150 eq / t or more, and the polyester resin satisfies (i) and / or (ii).　(i) The acid value (AVd) of carboxy groups belonging to a dicarboxylic acid component constituting the main chain of the polyester is 50 eq / t or more. (ii) The hydroxyl value (OHV) is 80 eq / t or less.

The invention relates to the field of foam adhesive tapes, in particular to a thermal visbreaking PE foam adhesive tape and a preparation method thereof. Comprising a body, and the body is sequentially provided with a first release layer, a high-viscosity glue layer, a PE foam layer, a thermal reduction glue layer and a release layer from the upper surface to the lower surface. The heat reducing adhesive layer is prepared by coating and curing a reducing adhesive liquid obtained by mixing a prepolymer B, thermal expansion microspheres, an isocyanate cross-linking agent and a solvent; a shell of the thermal expansion microsphere is a vinylidene chloride-acrylonitrile copolymer, and an inner core of the thermal expansion microsphere is a heating expansion agent; the prepolymer B is prepared from the following raw materials in percentage by weight: 70 to 80 parts of 2-ethylhexyl acrylate, 10 to 15 parts of ethyl acrylate, 3 to 8 parts of methacrylic acid, 1 to 3 parts of N-vinyl pyrrolidone, 0.4 to 0.6 part of benzoyl peroxide, 0.2 to 0.4 part of a chain transfer agent and 70 to 90 parts of a solvent. The thermal visbreaking PE foam adhesive tape has the advantages of being capable of being detached again, low in residual adhesive rate and the like.

The invention relates to a method and a device (1) for changing the viscosity of a melt, in particular a plastic melt, and filtering same. The device (1) comprises a first screw conveyor (3), a melt filter (4), a conveying device (2), and a granulation device (5). Gas-forming substances or a gas can be introduced into the first screw conveyor (3) by means of a supply device (7) such that the viscosity of the melt can be reduced so that a melt with a reduced viscosity can be provided to the melt filter (4), and the conveying device (2) has a transfer device (15) for introducing the filtered melt and a degassing device (16) for degassing the melt so that a melt with an increased viscosity can be provided to the granulation device (5).

The present invention relates to compositions of highly concentrated protein formulations showing reduced viscosity. The contained proteins in the prepared formulations are stabilized against aggregation and denaturation and are thus sufficiently storage-stable until administration to the patient.

This description outlines a process for obtaining maltodextrin with a DE between 17 and 19.9 and the maltodextrins obtained from the process. The described maltodextrins can be supplied as a powder or as a shelf-stable liquid. The described maltodextrins have a polysaccharide profile similar to that observed in prior art maltodextrins, but the maltodextrin solutions have a high solids content but reduced viscosity compared to prior art maltodextrins on a solution equivalent solids basis. The process involves adding an alpha-amylase and a pullulase enzyme to a polysaccharide mixture during a saccharification step. The described maltodextrins produce solutions at 50 °C and greater than 65% on a solids basis of dry solids, having a viscosity between 5,000 and 12,000 cP and a water activity of less than 0.80.

The present invention relates to liquid compositions comprising a nucleic acid having a reduced viscosity. Furthermore, the invention relates to methods for reducing the viscosity of a liquid compositions comprising a nucleic acid.

The present invention provides a biomass resource-derived polyester elastomer that, is not colored, and can retain excellent mechanical characteristics, retention stability, water aging resistance, and heat aging resistance exhibited by a fossil fuel resource-derived polyester elastomer. A biomass resource-derived polyester elastomer comprising a hard segment and a soft segment bonded with each other, wherein the hard segment consists of a polyester that contains, as constituent components, an aromatic dicarboxylic acid and an aliphatic and / or alicyclic diol, and the soft segment contains, as constituent components, an aromatic dicarboxylic acid and an aliphatic polyether, wherein the aromatic dicarboxylic acid and the aliphatic and / or alicyclic diol are derived from a fossil fuel resource, and the aliphatic polyether is derived from a biomass resource, wherein the polyester elastomer has a biobase degree of 20 to 85%, and wherein the polyester elastomer has a reduced viscosity of 1.2 dl / g or more.

The invention relates to a coating composition comprising a polyisocyanate composition based on 1,5-diisocyanatopentane with reduced viscosity, to a process for the preparation thereof, to coatings obtainable by the use thereof, and to the use of the polyisocyanate composition.

The invention discloses a preparation method of a UV visbreaking acrylic pressure-sensitive adhesive, and belongs to the field of curing coatings. The preparation method comprises the following steps: respectively reacting an acrylate monomer with an initiator and a solvent to prepare a mixture A and a fluorine-containing mixture B, mixing the mixture A and the fluorine-containing mixture B, adding a cross-linking agent and a photoinitiator, and stirring to prepare the pressure-sensitive adhesive. According to the method, toluene and ethyl acetate are preferably used as solvents, azodiisobutyronitrile is used as an initiator, and N-hydroxymethyl acrylamide and 1-hydroxycyclohexyl phenyl ketone are respectively used as a cross-linking agent and a photoinitiator. The preparation method does not need to add a polyfunctional group diluent, so that the problem of poor compatibility is solved; by optimizing the formula, the initial adhesion is improved, and the residual glue is reduced; the fluorine-containing component endows the adhesive layer with hydrophobicity, and the anti-fouling performance is improved. By reasonably designing the molecular structure and the formula, the problems of poor compatibility, insufficient initial adhesion, insufficient adhesive residue, insufficient surface cleanliness and the like of the existing UV visbreaking acrylic pressure-sensitive adhesive are effectively solved.

The present invention relates to the use of a soluble magnesium compound for adjusting, in particular reducing, the viscosity of an aluminum sulfate suspension.