5 results about "Phenylphosphonic acid" patented technology

This invention discloses a nitrogen-phosphorus flame retardant, a composition and composite material containing the flame retardant, its preparation method, and its application. The flame retardant has a structure as shown in formula (I), where n is an integer from 100 to 150. The preparation method of the flame retardant includes: synthesizing bis(4-formylphenyl) phenylphosphonate and bis(4-aminophenyl)phenylphosphonate, reacting the two to generate a Schiff base, and then reacting it with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain the nitrogen-phosphorus flame retardant PCNPO. This flame retardant, when compounded with melamine cyanurate (MCA), can be used to prepare flame-retardant nylon 6 composite materials. This invention, through the synergistic effect of PCNPO and MCA, enables nylon 6 to achieve the UL94 V-0 flame retardant standard at a low addition level, while maintaining excellent mechanical properties and processing stability, and exhibiting strong charring ability, simple process, and environmental friendliness. (I)

This invention relates to a rare-earth Ce-O-P core-shell structure-coated TPU flame-retardant material and its preparation method, belonging to the field of polymer combustion-supporting materials technology. It aims to address the problems of poor water resistance, easy precipitation of flame retardants, and decreased flame retardant rating and mechanical properties after boiling in water in existing flame-retardant TPUs. The material of this invention is composed of TPU, a rare-earth CeOP core-shell structure halogen-free flame retardant, a compatibilizer and dispersant, mineral oil, and an antioxidant; wherein the halogen-free flame retardant includes a rare-earth cerium phenylphosphonate compound and a phosphorus-nitrogen flame retardant. This invention obtains the rare-earth CeOP core-shell structure flame retardant through stepwise synthesis, and then blends and granulates it with TPU and other materials. After boiling in water at 90-120℃ for 168 hours, the material shows no precipitation, maintains the UL94 V0 rating (0.8mm), retains a tensile strength of >90%, and a breakage elongation of >100%.

This invention discloses a precursor and its preparation method, belonging to the field of lithium-ion battery cathode material technology; the molecular formula of the organic-inorganic hybrid manganese-iron precursor is Mn. x Fe y [C6H5PO3]·nH2O, where x+y=1, and 0.2≤x≤0.9, 0<n≤2. The organic-inorganic hybrid manganese-iron precursor prepared in this invention achieves a highly uniform atomic-level distribution of the two metal elements by uniformly complexing manganese and iron ions at the molecular level using phenylphosphonic acid ligands. This solves the phase separation and structural instability problems caused by elemental segregation in lithium manganese iron phosphate materials, thus laying a uniform and controllable compositional and structural foundation for the subsequent synthesis of high-performance cathode materials.

This invention discloses a method for preparing a ferromagnetic single-atom piezoelectric catalyst, the piezoelectric catalyst itself, and its application. The preparation method includes the following steps: weighing ammonium molybdate tetrahydrate and thioacetamide, dissolving them in ultrapure water, and stirring until a colorless and transparent solution is obtained; then adding nickel acetate tetrahydrate, continuing stirring, transferring the mixed solution to a high-pressure reactor, washing after the reaction, and drying to obtain the reaction product; spreading the reaction product evenly in a quartz boat, and finally calcining the reaction product at high temperature under a nitrogen atmosphere, and cooling to successfully prepare the Ni-MoS2 ferromagnetic single-atom piezoelectric catalyst. The piezoelectric catalyst prepared by this invention has good piezoelectric catalytic performance and can achieve high organophosphorus degradation efficiency in the treatment of phenylphosphonic acid wastewater.

This invention relates to the fields of inorganic chemical engineering and textile auxiliaries, and discloses a surface modification process for textile-grade sodium metaantimonate to improve dispersibility. The process includes: adding sodium aluminate to a sodium metaantimonate suspension and stirring until dissolved to create an alkaline liquid environment in which tetrahydroxyaluminate ions are stably present; adding an aqueous solution of phenylphosphonic acid dropwise to this alkaline system for acid-base neutralization, controlling the hydrolysis of aluminum species using the acid release rate, and inducing in-situ generated aluminum hydroxyl species to coordinate with phenylphosphonate ions. This invention constructs an antimony-oxygen-aluminum-oxygen-phosphorus chemical hybrid coating layer without a phase interface on the surface of sodium metaantimonate through a specific acid-base coupling synchronous mineralization mechanism. This kinetically blocks the self-condensation aging path of aluminum species, improves the interfacial bonding force and thermal stability of the modified layer under high temperature and high shear conditions, and effectively solves the problems of thermal desorption and secondary agglomeration of sodium metaantimonate during melt spinning.