50results about How to "High retention rate of mechanical properties" patented technology

According to the invention, a light-resistant MDI (diphenyl-methane-diisocyanate) polyurethane material is prepared by compounding MDI polyurethane, a coupling agent modified nano ZnO and organic anti-aging auxiliary. By adopting the coupling agent modified nano ZnO, the agglomeration phenomenon of the nano particles is reduced, and the dispersibility of nano ZnO and the compatibility with polyurethane are improved. The nano ZnO particle and the organic anti-aging auxiliary are in an excellent synergic effect; and by adding the modified nano ZnO and the organic anti-aging auxiliary, the chromatic aberration change and the gloss change of the MDI polyurethane are reduced, the mechanical performance retention rate is improved, and an unexpected beneficial technical effect is realized. Through the invention, the prepared MDI polyurethane has excellent anti-UV (ultraviolet) light aging performance, and the problem of low light resistance of the existing MDI polyurethane is solved.

The invention discloses a hollow thermoplastic rubber filling particle for artificial turf filling and a preparation method of the hollow thermoplastic rubber filling particle, wherein the hollow thermoplastic rubber filling particle is of a hollow tubular structure and prepared from the following components in parts by weight: 50-80 parts of high-viscosity basic resin, 20-40 parts of inorganic fillers, 0.1-5 parts of auxiliary and 0.1-10 parts of color master batches, wherein the auxiliary is a mixture formed by mixing an antiager with a coupling agent according to a weight ratio of (1-5):(1-5). The hollow thermoplastic rubber filling particle disclosed by the invention is formed by melting, blending, extruding and underwater granulating high-viscosity thermoplastic elastomers, and has the advantages of persistent elasticity, good water permeability, small packing density, low filling cost, recoverability and the like.

The invention provides a glass-fiber-reinforced hydrolysis-resistant polyester material which is prepared from the following raw materials in percentage by weight: 30-80% of polyester, 5-40% of glass fiber, 3-10% of compatilizer, 0.3-20% of hydrolytic reagent, 0.1-0.5% of antioxidant and 0.1-0.5% of lubricant. The invention also provides a preparation method of the glass-fiber-reinforced hydrolysis-resistant polyester material, which comprises the following steps: mixing the raw materials according to the percentage by weight, putting in a screw rod machine, extruding, and cooling with water to granulate, wherein the rotation speed of the screw rod machine is 180-600 rpm, and the temperature is 235-255 DEG C. The material provided by the invention has the advantages of better mechanical properties, high hydrolysis resistance, high mechanical property retentivity, favorable flowability, fewer surface floating fibers, excellent processability and low cost, and has very wide application prospects in the fields of electronics, electricity, automobiles, home appliances and the like.

The invention discloses a PCL conductive shapable material, and a preparation method and an application thereof, and belongs to the field of functional polymer materials. The PCL conductive shapable material is composed of the following substances by the mass percentage: 49%-98.4% of PCL, 1%-30% of a plasticizer, 0.5%-20% of carbon nanotubes, and 0.1%-1% of an antioxidant. After the components are mixed, the PCL conductive shapable material is obtained by melting the mixture with a twin-screw or single-screw extruder or an internal mixer. The PCL is modified by the carbon nanotubes, and with addition of N-N-butyl sulfonamide, the PCL is plasticized and the carbon nanotubes are subjected to surface treatment, so good dispersion of the carbon nanotubes is achieved while the softening temperature of the composite material is reduced, and good conductivity and shapable effect are obtained. The prepared conductive shapable functional material has the advantages of small volume resistance, low softening temperature and the like, and has good application prospects in the fields of hot compress medical apparatus and instruments, medical insulation pads, electric blankets and the like.

The invention relates to a method for preparing high-temperature resistant phenolic resin with organic silicon resin as a curing agent. The method comprises the following steps: heating an organic silicon resin precursor in an oil bath under nitrogen protection, and stirring to react to obtain organic silicon resin prepolymer having a crosslinking degree of 10-20 percent; heating and uniformly mixing with phenolic resin in a mass ratio of (0.1-0.3):1 in under nitrogen protection, injecting the mixed solution into a mold cavity, and reacting at negative pressure; and curing, and removing the mold to obtain the high-temperature resistant phenolic resin. The preparation method is simple in process and strong in operability, is free of overflow of small molecules in the curing process, and is applicable to industrial production. By adopting the method, organic silicon resin is selected as a curing agent, and the cured phenolic resin has strong instant heat resistance, and has relatively high mechanical performance retention rate and residual carbon rate at high temperature.

The invention relates to deep processing modification and application of phosphorus ore byproduct phosphorus gypsum, and discloses a phosphorus gypsum filling material with thermoplastic processing performance. The phosphorus gypsum filling material is characterized in that a first cladding layer with flowing lubricity is formed on the surface of dry powdery phosphorus gypsum, a second hydrophobic layer is formed on the first cladding layer, and a third hot melt layer is formed on the second hydrophobic layer. The invention further provides a preparation method. Inorganic lubricant powder and the phosphorus gypsum are collided, ground and refined under the action of a high-speed jet mill by virtue of flowing lubricity of the inorganic lubricant powder, and anchoring groups of a dispersing agent are embedded with the phosphorus gypsum in a refining process of the dry powdery phosphorus gypsum, so that the phosphorus gypsum is endowed with high rheological processability, problems about high-filling application of the phosphorus gypsum filling material to plastics are radically solved, the phosphorus gypsum filling material is used for large products such as PVC enclosure wall baffle plates, agricultural seedling growing flowerpots, stone paper and garbage bags, the consumption of the phosphorus gypsum can be greatly improved, and the industrial application of the phosphorus gypsum to plastics is promoted.

The invention discloses single-component deacidified organosilicone sealant for bonding outdoor crafts, and a preparation method of the single-component deacidified organosilicone sealant. The single-component deacidified organosilicone sealant is prepared from the following raw materials in parts by weight: 30-100 parts of alpha-omega-dihydroxypolydimethylsiloxane, 1-10 parts of fumed silica, 10-30 parts of polydimethylsiloxane, 1- 8 parts of a crosslinking agent, 0.1-4 parts of a catalyst, 0.1-4 parts of a tackifier and 0.1-2 parts of modified aluminum-silver paste. The single-component deacidified organosilicone sealant for bonding the outdoor crafts is excellent in bonding performance when being used for filling base materials, aluminum materials, glass and the like of the crafts during bonding of the outdoor crafts; when being naturally damaged due to long-term ultraviolet irradiation and long-term exposure to air, the single-component deacidified organosilicone sealant still maintains good bonding performance with the base materials; furthermore, the sealant is high in retention rate of mechanical properties, and good glossiness can be maintained after the aluminum-silver paste is added for modification.