4 results about "Strontium phosphate" patented technology

This invention relates to the field of dental implants, specifically to an osteogenic dental implant and its preparation method, comprising the following steps: Step 1, mixing osteogenic bioceramic, strontium phosphate, and β-glycerol magnesium phosphate in tantalum metal powder to obtain a mixed raw material; Step 2, 3D printing the mixed raw material to obtain an implant matrix; Step 3, generating a polydopamine coating on the implant matrix to obtain a coated implant; Step 4, bonding a hydrogel to the coated implant to obtain an osteogenic dental implant. The polydopamine coating of this invention forms covalent bonds with the tantalum metal powder through catechol groups and chelates strontium / magnesium ions through quinone groups. Furthermore, the phenolic hydroxyl groups of the polydopamine coating form a hydrogen bond network with the polar groups of the hydrogel, and also exhibit cation-π interactions and hydrophobic synergy with the hydrogel. Therefore, the hydrogel can be indirectly and firmly bonded to the implant matrix through the polydopamine coating.

The invention belongs to the technical field of metal surface treatment, and discloses a surface sealing coating for an antibacterial stainless steel coloring film and a sealing treatment method of the surface sealing coating. The surface sealing coating comprises the following raw materials in parts by weight: 30-50 parts of matrix resin, 15-25 parts of corrosion inhibition filler, 5-10 parts of an adhesion promoter, 20-30 parts of a solvent, 2-5 parts of an auxiliary agent and 5-20 parts of an organosilicon quaternary ammonium salt antibacterial agent. Wherein the matrix resin is epoxy modified acrylic resin; the corrosion inhibition filler is selected from at least one of modified strontium aluminum phosphate and nano silicon dioxide. According to the invention, the epoxy modified acrylic resin is used as matrix resin, and has high adhesiveness of epoxy and weather resistance of acrylic acid; environment-friendly corrosion inhibition filler strontium aluminum phosphate is compounded with nano silicon dioxide, so that corrosion inhibition ions are released when the coating is damaged, and pitting corrosion is inhibited; meanwhile, by slowly releasing the organosilicon quaternary ammonium salt compound, adhesion and breeding of bacteria are effectively hindered.

This application relates to the field of medical implants, specifically to an osteogenic intervertebral fusion device and its preparation method, comprising the following steps: Step 1: 3D printing tantalum metal powder to obtain a base layer; Step 2: 3D printing tantalum metal powder and osteogenic bioceramic onto the base layer to form a transition layer, obtaining a matrix; Step 3: Plasma-spraying osteogenic bioceramic onto the matrix to form a bioceramic layer, obtaining a preliminary product; Step 4: Immersing the preliminary product in a mixed solution of strontium phosphate and β-glycerophosphate magnesium phosphate, drying and curing to obtain the osteogenic intervertebral fusion device. In this application, the base layer can autonomously adjust its porosity, and the transition layer allows for a smooth stress transfer from rigid metal to flexible ceramic, reducing interfacial stress concentration. The bioceramic layer and the transition layer form an interlocking structure, enhancing the interfacial shear strength. Strontium phosphate and β-glycerophosphate magnesium phosphate are enriched on the material surface, which can both rapidly induce osteoblast migration and continuously promote mineralization.

This invention relates to the field of coatings, specifically to a water-based epoxy glass flake heavy-duty anti-corrosion coating and its preparation method, comprising 11.5-12.5 parts water, 1-1.2 parts dispersant, 0.5-0.6 parts wetting and defoaming agent, 0.2-0.3 parts defoamer, 1.1-1.2 parts anti-settling agent, 49-51 parts water-based epoxy resin dispersion, 3-3.4 parts rust-inhibiting pigment, 30-36.5 parts graded glass flakes; 9.8-10.2 parts water-based amine copolymer, 1.3-1.4 parts flash rust inhibitor, and 1.5-2.5 parts water. This anti-corrosion coating contains no solvents and has low VOCs. The anti-corrosion performance of the coating can be improved by adding two rust-inhibiting pigments and fillers: aluminum tripolyphosphate, zinc strontium phosphate, and glass flakes. Neutral salt spray and seawater immersion tests showed that the coating film did not bubble, rust, or peel after 12,000 hours of immersion.