54results about How to "Viscosity Adjustment" patented technology

The invention provides organosilicone packaging glue for packaging an LED lamp filament. The glue is prepared from a component A and a component B in a weight ratio of 1: 1, wherein the component A is prepared from the following raw materials in parts by weight: 80-90 parts of vinyl silicone oil, 10-20 parts of a thixotropic agent white carbon black and 0.1-0.3 part of a catalyst; the component B is prepared from the following raw materials in parts by weight: 75-95 parts of vinyl silicone oil, 5-15 parts of a catalyst, 2-5 parts of an adhesive and 0.1-0.3 part of an inhibitor. The LED lamp filament packaging silica gel provided by the invention is prepared from the components A and B. The component A provides the special thixotropic agent in the system, so that the glue has a good leveling property and strong operability while having good thixotropy. The light transmittance of cured glue is not decreased.

The invention discloses a low-resilience liquid accelerator for shotcrete and a preparation method thereof. The accelerator is prepared from the following raw materials in percent by mass: 20%-40% of sodium hydroxide, 25%-40% of aluminium hydroxide, 3%-10% of a synergist, 0.5%-2% of a setting accelerator, 0.003%-0.02% of a viscosity adjusting agent, and the balance water, wherein, the synergist is sodium silicate, the setting accelerator is an alcohol amine substance, and the viscosity adjusting agent is potassium chromate or sodium nitrite. The preparation method comprises the following technical steps: adding sodium hydroxide and the synergist into a reaction kettle, adding water, and starting an agitator and a heater; keeping the temperature after the temperature reaches a set temperature, adding aluminium hydroxide, and reacting with the constant temperature; adding the viscosity adjusting agent, stirring, heating, reacting with a constant temperature, then stopping heating, and naturally cooling; and adding the setting accelerator after the reaction system is cooled, and cooling to room temperature, so as to obtain the accelerator. The accelerator is short in setting time, low in resilience and moderate in viscosity, generates a little sediment, has good cement adaptability, and the preparation method for the accelerator is simple, practicable and energy-saving.

The present invention relates to a preparation method of size for sizing textile warp yarn. Said preparation method includes the following several steps: preparing size raw materials, including starch, size additive and water-soluble synthetic high polymer; adding water and stirring them; heating and stirring them uniformly, heating temperature is 40-65deg.C and heating time is 10 min; and heat-insulating at 40-65deg.C for 10 min so as to obtain the invented size.

The invention provides modified emulsified asphalt which is prepared from base asphalt, linear SBS, SBR latex, a compatibilizer, an emulsifier, sulfur, naphthenic base distillate oil and hydrochloride. The SBR latex is large in polarity and can improve the adhesion performance of the modified emulsified asphalt; the linear SBS can improve the viscosity and the ductility of the asphalt; the compatibilizer can promote compatibility of the linear SBS, the SBR latex and the base asphalt and improve the storage stability of the modified asphalt; the sulfur can improve the storage stability of the modified asphalt; the naphthenic base distillate oil can regulate the viscosity of modified emulsion; and as for the provided modified emulsified asphalt, the softening point is 70.5 DEG C, the ductility reaches up to 57 (5 DEG C ductility/cm), the solid content reaches up to 65 percent, the viscosity is 6.5 (E25/S), the storage stability is good, and the modified emulsified asphalt meets and is well over the requirements of JTGF40-2004 product specification of Ministry of Communications and can be suitable for a high-grade asphalt pavement and a related construction technology.

The invention discloses a viscosity adjustable crosslinked polymer displacement agent and a preparation method thereof. The displacement agent comprises polymer, a crosslinking agent, a viscosity regulator and water for preparation, wherein the concentration of the polymer in the prepared crosslinked polymer displacement agent is 500-1,000mg/L; the concentration of the crosslinking agent is 30-120mg/L; the concentration of the viscosity regulator is 0-8mg/L; and the pH value of the water for preparation is 7.5-8.5. The preparation method comprises the following steps of: adding solution of crosslinking agent into solution of polymer, and uniformly stirring; adding solution of viscosity regulator and uniformly stirring; and regulating the viscosity of the crosslinked polymer displacement agent by regulating the using amount of the crosslinking agent and a crosslinking aid. Experiments show that: compared with 1,200mg/L polymer solution contrast, the displacement agent can improve the recovery ratio by 0 to 5 percent, and saves raw material cost by 10 to 20 percent.

The invention relates to a graphene-based fluorine-containing photo-curing anticorrosive paint and a preparing method thereof. The anticorrosive paint is prepared from, by mass, 60-70 parts of fluorine-containing oligomer resin, 5-10 parts of a photoinitiator, 2-5 parts of an auxiliary initiator, 20-25 parts of an active diluting agent, 0.1-3 parts of graphene, 0.1-1 part of a dispersing agent, 0.1-1 part of a levelling agent, 0.1-1 part of an anti-setting agent and 0.1-1 part of a defoaming agent. The preparing method of the metal paint comprises the steps that raw materials are proportionally weighed, the graphene, the fluorine-containing acrylate resin, the active diluting agent and other additives are mixed and mechanically stirred to disperse uniformly and then are ultrasonically dispersed, and after the mixture is dispersed evenly, the graphene-based fluorine-containing photo-curing anticorrosive paint is obtained. The graphene-based fluorine-containing photo-curing anticorrosivepaint has the advantages that the corrosive resistance, the chemical resistance and the weather resistance of the paint are excellent, and the solidified anticorrosive paint can be rapidly obtained through a photo-curing method and is environmentally friendly.

The invention discloses an epoxy resin composition capable of rapid thickening and a fiber reinforced composite material semi-cured material thereof, the epoxy resin composition is composed of rapid curing epoxy resin and an epoxy thickening agent containing active hydrogen, and the initial viscosity of the epoxy resin composition capable of rapid thickening at 25 DEG C is 5-100 Pa.s. The epoxy resin is low in viscosity and beneficial to infiltration of reinforced fibers, amino reactive hydrogen of an epoxy thickener and epoxy functional groups are subjected to a rapid cross-linking reaction at the temperature of 20-70 DEG C for thickening, the viscosity is 2,000-500,000 Pa.s at the temperature of 25 DEG C after thickening, and the epoxy resin fiber reinforced composite semi-cured materialstable in storage is formed. The invention also discloses a fiber reinforced composite material semi-cured material such as a chopped fiber sheet molding compound, a chopped fiber felt prepreg, a continuous fiber or fabric prepreg and the like, which is prepared by infiltrating a plurality of reinforced fibers into the epoxy resin composition and carrying out a thickening reaction at 20-70 DEG Cfor 1-200 hours.

The present invention describes use of a fluid having a VI of at least 130 to improve the en- ergy efficiency of a hydraulic system. Furthermore, the present invention relates to a hy- draulic system comprising a hydraulic fluid having a VI of at least 130, a unit for creating mechanical power, a unit that converts mechanical power into hydraulic energy, and a unit that converts hydraulic energy into mechanical work. Preferentially, engine speed can be reduced to decrease load and stress while delivering the same amount of hydraulic power.

The invention discloses a magnetorheological damper with a float ring and double outlet rods. The magnetorheological damper comprises a working cylinder, the float ring, a piston, two piston rods and an external electromagnet. End covers are fixed to two ends of the cylindrical working cylinder; a plurality of identical annular discs are fixed onto the same core column to form the piston, and excitation coils are wound in annular gaps among the various annular discs of the piston; the piston is mounted in the working cylinder, and magnetorheological fluid flowing gaps are reserved between the outer peripheral wall of the piston and the inner peripheral wall of the float ring and between the outer peripheral wall of the float ring and the inner peripheral wall of the working cylinder; one ends of the two piston rods are respectively fixed to two ends of the piston, and the other ends of the two piston rods extend out of the two ends of the working cylinder via sealing devices and sliding bearings on the two end covers of the working cylinder; the gaps in the working cylinder, between the inner peripheral wall of the float ring and the outer peripheral wall of the piston and between the outer peripheral wall of the float ring and the inner peripheral wall of the working cylinder are filled with magnetorheological fluid; the external electromagnet is fixed onto the outer circumference of the working cylinder.

The invention relates to agricultural harvesting crop packaging materials, and particularly relates to a material formula and a production process of an automatic winding packaging film during harvesting and packaging operation of cotton, silage and the like. The material formula of the automatic winding packaging film material comprises the following raw materials in percentage by mass: linear low-density polyethylene, high-pressure low-density polyethylene, metallocene polyethylene, color masterbatch, an anti-aging agent, an ultraviolet light absorber and an antistatic agent. The productionprocess of the automatic winding packaging film mainly comprises the steps of preparing materials; blowing a film; conducting gluing; manufacturing film rolling units; and connecting the film rollingunits into a finished rolled film. By means of the material formula, the prepared packaging film is moderate in material thickness, stable in anti-aging and anti-static performance, high in anti-buffering strength, good in retraction rate and good in anti-piercing performance. The production process is reasonable in flow design, economical and practical, material bag sealing is enabled to be tightand firm, and the produced packaging film can be rapidly separated in the material packaging process.

The invention discloses a high flame-retardant epoxy resin heavy anticorrosive paint. The raw materials include: epoxy resin, polyurethane, organic silicon resin, carboxyl terminated butyronitrile liquid rubber, triethylamine, zinc borate, nano-calcium carbonate, modified nano titanium dioxide, polyaniline modified glass flake, graphite, diacetone alcohol, propanediol butyl ether, propylene glycol methyl ether acetate, xylene, methylnonylketone, gluconic acid, water, a leveling agent, a defoaming agent, and hydroxymethyl cellulose. The high flame-retardant epoxy resin heavy anticorrosive paint provided by the invention can resist the corrosion of strong acid and strong alkali, also has good impact resistance, excellent flame retardance and corrosion resistance, and has long service life.

The invention relates to the technical field of electronic appliances, and particularly discloses matte UV ink and a preparation method thereof. The matte UV ink comprises the following substances in parts by weight: 60-80 parts of polyurethane resin, 0.2-1 part of extinction wax powder, 0.2-1 part of a wetting dispersant, 0.2-1 part of a leveling agent, 15-25 parts of a diluent, 2-10 parts of a filler and 1-2 parts of other auxiliaries, the polyurethane resin is polyurethane resin modified by a modifier, and the modifier comprises PMMA hollow microspheres; the preparation method comprises the following steps: S1, pre-dispersing; and S2, ink preparation. The matte UV ink disclosed by the invention can be used for printing marks on electronic and electrical appliances, and has the advantages of being stable in gloss, not easy to float, uniform in extinction, and smooth in flatness; in addition, the preparation method disclosed by the invention has the advantages of simplicity and convenience in operation and uniform dispersion.

The invention relates to an ejecting thermosyphon multifunctional oil return device for a heat pump unit. The ejecting thermosyphon multifunctional oil return device comprises an evaporator, a cooling heat exchanger, a compressor and an ejector. The evaporator is sequentially connected with the cooling heat exchanger and the compressor through a refrigerant liquid inlet pipeline; the ejector is respectively connected to the evaporator and the compressor through pipeline connection; the cooling heat exchanger is connected with an oil tank and further connected with the ejector through a cooling electromagnetic valve; a bypass electromagnetic valve is arranged between the ejector and the refrigerant liquid inlet pipeline, and the ejector is further connected with a condenser gas pipeline through a condensed gas electromagnetic valve; and a lubricating oil detection device is arranged on the cooling oil pipe between the compressor and the cooling heat exchanger. Oil temperature control and system oil return are achieved at the same time, the cost can be reduced, and the compressor efficiency and the system performance are improved; and lubricating oil entering the compressor is detected online through a viscosity detection device, so that the temperature of the lubricating oil entering the compressor is adjusted in time, and the lubricating effect of the lubricating oil is guaranteed.

The invention provides a low-heat-release epoxy resin composition and a preparation method thereof, the low-heat-release epoxy resin composition comprises an epoxy resin mixture, a curing agent and an accelerant, wherein the epoxy resin mixture is composed of low-viscosity epoxy resin and low-epoxy-value epoxy resin, the content of the low-viscosity epoxy resin is 50-80 parts by mass, the content of the low-epoxy-value epoxy resin is 15-30 parts by mass, the content of the curing agent is 4-16 parts by mass, the content of the accelerant is 0.5-5.5 parts by mass, the viscosity of the low-viscosity epoxy resin ranges from 10,000 mPa.s to 15,000 mPa.s, the epoxy value of the low-epoxy-value epoxy resin is not higher than 0.3, and a mass ratio of the low-viscosity epoxy resin to the low-epoxy-value epoxy resin is (50-80): (15-30). The epoxy resin composition prepared by the invention has the advantages of low heat release in curing reaction, long storage time and good manufacturability.

The invention provides a quick-drying emulsion type epoxy curing agent and a preparation method thereof. According to the preparation method, polyether amine with certain hydrophilicity reacts with excessive epoxy resin to form an amphiphilic prepolymer; and residual epoxy groups continuously reacts with proper excessive micromolecular polyamine due to the fact that the epoxy groups are greatly excessive, and therefore, an emulsion type epoxy curing agent with certain active hydrogen content can be formed; due to the existence of unreacted primary amine in the polyamine, the working life of the curing agent is shortened, so that the monofunctional epoxy compound is subsequently added to block the primary amine; and finally, water is added for emulsification, so that the emulsion type epoxycuring agent can be obtained. The synthesis method of the emulsion type epoxy curing agent is simple; a catalyst and a solvent do not need to be added; the raw materials are easy to obtain; the VOC content is zero; the application range of the emulsion type epoxy curing agent is wide; a paint film prepared from the emulsion type epoxy curing agent is high in surface drying speed, and related mechanical properties, salt spray resistance and other properties of the paint film are excellent; and therefore the emulsion type epoxy curing agent has a great industrial application prospect.

The invention provides an ultraviolet curing epoxy adhesive and a preparation method and application thereof. The ultraviolet curing epoxy adhesive is prepared from the following raw materials in parts by weight: 30-60 parts of basic epoxy resin, 20-30 parts of toughened epoxy resin, 10-30 parts of an epoxy diluent, 1-5 parts of a photoinitiator and 1-10 parts of an auxiliary agent, wherein the basic epoxy resin, the toughened epoxy resin and the epoxy diluent all have symmetrical molecular structures. By adding the basic epoxy resin, the toughening epoxy resin and the epoxy diluent which are symmetrical in molecular structure, the prepared ultraviolet curing epoxy adhesive can resist high-concentration acid-base etching liquid, is easy to trim and tear when used as UV glass edge sealing adhesive, is free of solvent addition in the preparation process, and meets the environment-friendly requirement; and the viscosity of the adhesive can be adjusted according to actual requirements.