143 results about "Calcium pyrophosphate" patented technology

The bone repair material comprises the following components:A) a first granular component with a diameter larger than 20 μm chosen from the group of: calcium phosphate, calcium pyrophosphate, or calcium sulfate dihydrate;B) a second component chosen from the group of apatite powder with a particle diameter smaller than 1 μm, (preferably smaller than 100 nm); andB) a third component comprising water or an aqueous solution, wherebyC) the volume fraction of the second and third component represents at least 35 volume-% of the total bone repair material.

The present invention discloses the preparation process of bone tissue engineering rack material of degradable foamed Sr-doped calcium phosphate ceramic. It is prepared through bone cement copying foam structure process, and the Sr-doped apatite bone cement slurry as material includes solid phase particles of Ca4(PO4)2, CaPO4 and SrPO4 in certain molar ratio and liquid phase of 0.5-1.0 mol / L H3PO4 aqua in the solid / liquid ratio of 1.5-3.0. Polyurethane foam template is adopted. The final product is mixture of Sr-doped apatite and tricalcium strontium phosphate or the mixture of tricalcium strontium phosphate and calcium strontium pyrophosphate, and its component phase contents may be controlled through regulating the molar ratio of materials, solid / liquid ratio and phosphoric acid concentration so as to control the material degrading rate.

Provided is a single phase oral care composition having a whitening agent; a first abrasive selected from calcium pyrophosphate, calcium carbonate, and dicalcium phosphate; a second abrasive that may include sodium metaphosphate; an anticalculus agent; and a substantially anhydrous carrier that may include an ethylene oxide / propylene oxide copolymer. In the composition, a wt % of the second abrasive is equal to or greater than a wt % of the first abrasive.

A phosphor layer is composed of tri-band phosphor particles bound together by a binder. A material as the main component of the binder is a mixture of (1) a compound formed by calcium oxide, barium oxide, and boron oxide, and (2) calcium pyrophosphate. Dissolved in the main component material of the binder is a luminescent component that converts ultraviolet radiation of 254 nm to ultraviolet radiation of longer wavelengths or to visible light. Examples of such a luminescent component include an oxide of gadolinium (Gd), terbium (Tb), europium (Eu), neodymium (Nd), or dysprosium (Dy), each of which belongs to lanthanum series, and an oxide of thallium (Tl), tin (Sn), lead (Pb), or bismuth (Bi).

A bone graft substitute using magnesium substituted calcium phosphate compounds and a method of manufacturing the same is provided in which the bone graft substitute is used for recovering bones damaged due to a bone fracture. The method of manufacturing a bone graft substitute includes the steps of mixing powdered calcium pyrophosphate and a magnesium included compound to thereby obtain a composition, pressure-forming the compositions to obtain a plastic body; and sintering the plastic body.

The invention relates to a high-hardness pressure-resistant terrace material which is composed of the following components in parts by weight: 26-28 parts of polypropylene, 9-13 parts of furan resin, 11-12 parts of magnesium bicarbonate, 7-9 parts of calcium pyrophosphate, 11-13 parts of acrylonitrile, 5-6 parts of diphenyl ether and 3-5 parts of methylethylketone. The prepared terrace material has the characteristics of high hardness and pressure resistance.

A nano-class fermented active organic fertilizer is prepared from ammonium humate organonitrogen, ammonium polyphosphate, ammonium phosphate, calcium potassium pyrophosphate, organopotassium, additive and water through screening raw materials, grinding, biochemical reacting, adding additive, granulating, compounding, drying, cooling and coating. Its advantages are no poison and environmental pollution, and multiple functions including improving soil and crops, regulating growth of plant, increasing yield of crops, resisting diseases and bacteria, etc.

The invention relates to a method for preparing a porous hydroxyapatite / calcium pyrophosphate compound bone repair material, and belongs to the technical field of biomedical material preparation. The method includes the steps that 85%-95% by mass of hydroxyapatite and 5%-15% by mass of calcium pyrophosphate ceramic powder are weighed and are subjected to ball milling to obtain mixed powder; then 45%-55% by mass of mixed powder and 45%-55% by mass of ammonium-bicarbonate pore forming agent powder are mixed to be even, and are pressed into a block pressed blank through a machine; the pressed blank is put into a graphite mold to be placed into a spark plasma sintering furnace to be sintered, the temperature is naturally cooled to the room temperature along with the spark plasma sintering furnace, demolding is carried out, and the porous hydroxyapatite / calcium pyrophosphate compound bone repair material is obtained. According to the method for preparing the porous hydroxyapatite / calcium pyrophosphate compound bone repair material, binding agents and template agents are avoided, ingredients are pure and free of detrimental impurities, the porosity is controllable between 10% and 30%, and the degradation rate is better matched with bone tissue growth; the good ossifying inducing capability is achieved, the technology is simple and easy to operate, and the porous hydroxyapatite / calcium pyrophosphate compound bone repair material can be used as a bone defect repair material for body hard tissue regeneration or reconstruction.

The bioactive nano titania ceramic block is prepared with nano titania powder meeting biological and medical requirement, such as rutile powder and / or anatase powder, as main material, and through mixing with magnesium oxide powder, alumina powder, calcium pyrophosphate or other crystal growth inhibitor, cold isostatic pressing formation, and sintering. Under intracorporal physiological environment condition, the ceramic block can adsorb calcium and phosphorus ion to form surface bone apatite layer for bioactive chemical combination with bone tissue. The bioactive nano titania ceramic may be implanted into tooth or other bone fault cavity to form bioactive combination safely and reliably in relatively low cost.

The invention discloses an ultrasonic bright cleaning agent for an aluminum case workpiece of a mobile phase battery. The ultrasonic bright cleaning agent comprises the components in percentage by weight as follows: 0.1-0.4% of potassium hydroxide, 1-7% of sodium tripolyphosphate, 1-4% of sodium pyrophosphate, 1-6% of sodium silicate pentahydrate, 0.1-2% of ethylene glycol monobutyl ether, 1-5% of activator (Y-71), 1-6% of activator (Y-90), 0.1-1.0% of activator (QYL-252C), 0.5-2% of JFC, 1-3% of NP-6, 1-2% of defoamer and the balance of deionized water. The preparation method comprises the following steps of: firstly, adding calculated and weighed deionized water into a stainless steel reaction kettle, starting a stirrer and controlling the rotating speed at 60rpm; then, sequentially adding the calculated and weighed solid raw materials into the reaction kettle; at least stirring each raw material for 10 minutes; then sequentially adding liquid raw materials calculated and weighed into the reaction kettle slowly; stirring while adding; and continuously stirring till the liquor is the uniform maize-yellow liquor.

The present invention provides a solid, oral tooth whitening confectionary composition comprising a tooth whitening agent comprising an alkaline or alkaline earth metal pyrophosphate, preferably calcium pyrophosphate. In one embodiment, the composition of the invention comprises an additional tooth whitening agent.

The present invention relates to a flat bread dough composition, comprising: A) flour; B) shortening; C) water; and D) a leavening system having a leavening base and a leavening acid having a combination selected from the group consisting of a) sodium aluminum phosphate and dicalcium phosphate dihydrate; b) sodium aluminum phosphate and sodium acid pyrophosphate; c) sodium acid pyrophosphate and dicalcium phosphate dihydrate; d) sodium acid pyrophosphate, monocalcium phosphate, and calcium acid pyrophosphate; e) dicalcium phosphate dehydrate, monocalcium phosphate, and calcium acid pyrophosphate; f) sodium aluminum phosphate, sodium acid pyrophosphate, and dicalcium phosphate dihydrate; g) sodium aluminum sulfate and dicalcium phosphate dihydrate; and h) sodium aluminum sulfate and sodium acid pyrophosphate, the sodium acid pyrophosphate exhibiting an evolved percentage of carbon dioxide of about 30 or less at room temperature prior to baking, and the slower reacting of the leavening acids in the combination being at least 10 wt % of the total weight of the acid combination.

A prorous nanometre titanium oxide based heterogeneous bioactive surface layer is prepared by micro-arc oxidizing process, that is, the aqueous solution containing Ca and P is used as electrolyte andthe Ti or Ti-alloy is oxidized by micro-arc generated by high-voltage pulse power supply. The said bioactive surface layer is composed of TiO2, calcium titanate, alpha-calcium phosphate and beta-calcium pyrophosphate and has a thickness of over 30 microns, no interface with the matrix, multi-porous nm-crystalline structure on morphology, high bonding strength, good plastic toughness, capability of inducing the formation of apatite and good bioactivity. Its advantages are more than 30 micros for thickness, no interface with matrix, high adhesion, good plastic, toughness and bioactivity, and the elastic modulus close to that of bone.