34results about How to "Play a plasticizing effect" patented technology

The invention belongs to the field of medical hemostatic materials, in particular to a hemostatic material and a preparation method thereof. The hemostatic material includes the following raw materials in parts by weight: carboxymethyl chitosan 0.1-1.5, polyvinyl alcohol (PVA) 0.5-2, compound toughening material (hereinafter also referred to as: plasticizing system) 0.2-5 , 0.5-1.5 parts of ionic cross-linking agent, and the hemostatic material may also include 0.5-3 parts by weight of a broad-spectrum hemostatic antibacterial agent. The product of the invention has good mechanical elasticity, rapid hemostasis, complete degradation, non-toxicity, and strong antibacterial property; it is suitable for wound hemostasis, preferably for body cavity hemostasis, especially for nasal cavity hemostasis.

The invention discloses ultrafine bainite bridge cable steel and a preparing method thereof, and belongs to wires for bridge cables and production thereof. The thermo-mechanical treatment + isothermalquenching technology is adopted for obtaining the cable steel; pre-deformation and low-temperature bainite isothermality are combined, refining technologies of microalloy refinement, controlled rolling and cooling refining, pre-deformation and low-temperature bainite isothermality are comprehensively used, an ultrafine bainite structure composed of non-carbonization bainite and retained austeniteis obtained, the tensile strength of the structure ranges from 1800 to 2100 MPa, and the ductility of the structure ranges from 12 to 20%; the preparing process of the ultrafine bainite bridge cablesteel comprises the steps of smelting, continuous casting, hot rolling, cutting, austenitizing, pre-deforming and low-temperature bainite isothermality. During pre-deforming, firstly, a cut hot-rolledwire rod is heated again to Ac3+50 DEG C to be subjected to austenitizing, heat preservation is carried out for 0.5 to 1 h, rapid cooling (the cooling speed is larger than 10 DEG C / s) to 220 to 280 DEG C is carried out, further warm rolling is carried out, the rolling reduction is 20 to 30%, then, the wire rod is put into a salt bath furnace at the temperature of 220 to 280 DEG C to be subjectedto isothermality treatment for 3 to 5 h, and isothermality bainite conversion is carried out; and the wire rod is taken out and subjected to air cooling to the room temperature.

The invention relates to a PVC stabilizer with good heat and light stability, and a preparation method thereof, and belongs to the technical field of PVC plastic assistants. The chemical structural formula of the PVC stabilizer is shown in the description; and in the formula, R is a carboxylic group, R1 is an organic acid radical, x is the valence of the R1, m is 0, 1, 2, 3, 4..., mx is less than n, M is a metal, and n is the valence of the metal. The preparation method comprises the following steps: carrying out an esterifying reaction on a phenyl diacid compound and 2,2,6,6-tetramethyl-4-piperidinol to generate a phenyl diacid ester of mono(tetramethylpiperidine), reacting the phenyl diacid ester of mono(tetramethylpiperidine) with the R1 acid and sodium hydroxide to generate a sodium salt, adding metal salt, and carrying out a metathesis reaction to obtain the target stabilizer, or directly reacting the phenyl diacid ester of mono(tetramethylpiperidine) with metal hydroxide or metal oxide at a high temperature to obtain the target stabilizer. The PVC stabilizer has good heat stability and good light stability, and the preparation method has the advantages of simplicity, easiness in condition control, good reappearance, and good development potential and application prospect.

The invention discloses a solid softener for rubber and a preparation method. The solid softener is prepared from a carbon nano tube, high-adsorption-performance packing, a surfactant, a thermoplastic macromolecular material and various softeners for rubber. Compared with a common liquid softener, the solid softener for rubber has the advantages that the rubber mixing time is shortened by 20 percent, the rubber mixing uniformity is obviously improved, and the comprehensive mechanical property of mixed rubber is obviously improved. The method is simple, efficient, environmental-friendly and pollution-free; a prepared product is convenient to transport, accurately weighed, quickly added and high in dispersity; the phenomena of escaping, popping out, leakage and dripping of the common liquid softener are avoided; moreover, the carbon nano tube and the high-adsorption-performance packing are also reinforcers capable of enhancing and improving the mechanical property of the rubber; the added thermoplastic macromolecular material is plasticized at relatively high temperature and then is wetted with the softener; and after being cooled, the thermoplastic macromolecular material can adsorb part of the softener, so that the solid powdered softener can still keep no agglomeration under a long-term gravity state.