5results about How to "Low viscosity properties" patented technology

The present invention provides an epoxy resin composition for sealing, the epoxy resin composition comprising an epoxy resin, a polyfunctional epoxy compound having a polyalkylene glycol chain, and an inorganic filler. The epoxy resin composition has the properties of low viscosity, high glass transition temperature and low elastic modulus, and can inhibit warping under the condition of sealing a large-area substrate.

The invention discloses reactive dye ink for digital printing and a preparation method, and particularly relates to the field of fine chemical engineering and textile printing and dyeing. Comprising the following components in percentage by weight: 8wt%-25wt% of reactive dye, 2wt%-8wt% of a polymeric dispersant, 0.5 wt%-3wt% of an inorganic dispersant, 1wt%-4wt% of an organic-inorganic composite complexing agent, 0.5 wt%-5wt% of a viscosity modifier, 0.1 wt%-2wt% of a surfactant, 0.3 wt%-1.5 wt% of a pH buffering agent, 0.05 wt%-0.8 wt% of a preservative and the balance of deionized water. Through a dual stabilization mechanism of macromolecular steric hindrance and a nanoparticle rigid barrier and deep removal of destructive metal ions by a composite complexing agent, the particle size growth rate of the ink after accelerated aging for 30 days at 40 DEG C is lower than 5%, the ink can be stably stored for more than 12 months without sedimentation at normal temperature, and by combining a pure ink system, the stability of the ink is improved. And the fixation rate on the cotton fabric exceeds 85%, the color fastness to washing is greater than or equal to grade 4, the color fastness to dry / wet rubbing is greater than or equal to grade 4, and the color fastness to light is greater than or equal to grade 5.

The utility model discloses a motorcycle front magnetorheological damper and motorcycle, including working cylinder, guider assembly, piston assembly, floating piston assembly, magnetorheological fluid, outer tube support assembly, ECU control unit and sensor, guider assembly, piston assembly and floating piston assembly are located in the inside of working cylinder, and piston assembly includes built -in solenoid and damping passage, and damping passage penetrates the upper and lower end of piston assembly, and magnetorheological fluid fills the working cavity between guider assembly and floating piston assembly, and, outer tube support assembly is at least partially coated in the outside of working cylinder, and is connected with guider assembly, and ECU control unit and solenoid electric connection are used for the signal adjustment input to solenoid's current according to sensor, like this through solenoid and the combination of magnetorheological fluid, ECU control unit can real -time regulation magnetic field intensity, change the viscosity of magnetorheological fluid to dynamic control damping force.

The invention belongs to the technical field of lithium batteries, and particularly relates to a non-aqueous electrolyte for inhibiting dissolution of manganese ions in a lithium ferric manganese phosphate battery as well as a preparation method and application of the non-aqueous electrolyte. The first electrolyte comprises a first non-aqueous organic solvent, a second non-aqueous organic solvent and a third non-aqueous organic solvent, wherein the first non-aqueous organic solvent comprises at least one carbonate solvent; a first lithium salt; the first additive is prepared from trimethyl silicon methyl acetate and tetrafluoroethyl-trifluoroethyl ether; the second electrolyte includes: a second non-aqueous organic solvent including at least one carbonate solvent; a second lithium salt; the second additive comprises lithium tetrafluoroborate. Compared with the prior art, the problems that manganese ions in the lithium manganese iron phosphate battery are easy to dissolve out, and long-term cycling stability and high-rate performance are difficult to consider at the same time in the prior art are solved. According to the scheme, through the design of the electrolyte, inhibition of dissolution of manganese ions and synchronous improvement of the cycle performance and the rate capability are achieved.

This invention discloses a method for recycling waste polyurethane materials and a method for preparing polyurethane products, belonging to the technical field of waste polyurethane material recycling and reuse. The recycling method includes: a powder preparation stage, where waste polyurethane materials are pulverized using a pulverizing device to obtain polyurethane powder; a premix preparation stage, where the polyurethane powder is mixed with a degrading agent, catalyst, and co-solvent in a specific ratio, and then mixed uniformly using a stirring device to obtain a premix with a certain powder content; and a degradation stage, where the premix is ​​ground, extruded, and sheared using equipment with mechanical shearing and extrusion functions, the reaction process is carried out within a set temperature range, and after the reaction is completed, a degraded polyurethane mixture is obtained. In the method for preparing polyurethane products, part or all of the polyol raw material is taken from the degradation mixture. This invention achieves low reagent consumption, low temperature and short time degradation, no need for gas protection, and no generation of toxic substances such as aromatic amines. The resulting high-performance heterogeneous polyol can be directly used in the preparation of polyurethane products without any post-processing.