64 results about "Technetium stannous pyrophosphate" patented technology

This invention relates to oral care compositions comprising zinc phosphate, a first source of stannous (e.g., stannous fluoride); and a second source of stannous, wherein the second source of stannous comprises stannous pyrophosphate, as well as to methods of using and of making these compositions.

This invention relates to oral care compositions comprising a first source of stannous, a second source of stannous, wherein the second source of stannous contains stannous pyrophosphate, and a zinc source selected from the group consisting of: zinc oxide, zinc citrate, zinc lactate, and combinations thereof, as well as to methods of using and of making these compositions.

The invention relates to a method for preparing high-purity stannous pyrophosphate. The method comprises the following steps of using water with air removed to respectively dissolve soluble stannous salt and soluble pyrophosphate, vacuumizing to remove air in solution and a reactor, controlling the temperature to be between 50 and 80 DEG C, and under stirring, mixing the two kinds of raw material solution to react; then sealing the reactor, cooling the reactant to room temperature, filtering the reactant, washing the deposit, and centrifuging the deposit to dry the deposit; and adding the deposit into water to disperse the deposit, pumping the air, controlling the temperature to be between 50 and 80 DEG C, stirring, washing, cooling the reactant to room temperature, filtering andcentrifuging the deposit to dry the deposit, and drying the deposit in vacuum to obtain a high-purity white powered stannous pyrophosphate product. The stannous pyrophosphate content in the stannous pyrophosphate product is greater than 99 percent. The stannous pyrophosphate prepared by the method is high in purity, large in crystalline grains and easy to wash. The method is simple and convenient to popularize and use.

The invention discloses a method for preparing stannous pyrophosphate. The technique of the method is as follow: stannous chloride and stannous sulfate with a short time retention period (0 to 72 hours) reacts with stoichiometric alkali metal pyrophosphate solution (thickness of 1 to 30 percent) in room temperature; the reaction precipitate is washed by water until Cl<-> is less than 1 percent; white powder products are obtained after filtering, drying and crashing. The complex compound solution which is formed by the products and alkali metal pyrophosphate is colourless and transparent, and has a turbidity degree merely of 0 to 5.

The invention relates to a weakly alkaline tin-base lead-free solder composite plating solution and a technique for preparing an alloy plating by using the composite plating solution, belonging to the technical field of electroplating. The composite plating solution is composed of a tin-base plating solution and a metal particle dispersion solution, wherein the tin-base plating solution is composed of stannous pyrophosphate, potassium citrate, potassium pyrophosphate, phloroglucinol, dipotassium hydrogen phosphate and cobaltous sulfate; and the metal particle dispersion solution is composed of metal particles and a surfactant. The composite plating solution is weakly alkaline; and at the plating temperature of 35-65 DEG C, a direct current or pulse current can be charged to perform electroplating to obtain the tin-base lead-free solder composite plating for different alloy systems. The composite plating solution provided by the invention has the advantages of environmental protection, no toxicity, high stability, low corrosivity, simple technique and low cost, can be used can be used for preparing tin-base lead-free weldable platings and tin-base lead-free salient points, and is applicable to the industries of micro-electronics and optoelectronics, such as connection and packaging of chips, formation of electronic device surface pads or patterns, and the like.

The invention provides a negative electrode active material and a preparation method thereof. The negative electrode active material comprises stannous pyrophosphate, and tin and carbon which are positioned on the surface of the stannous pyrophosphate. The negative electrode active material prepared by the method can be used for obviously improving the reversible specific capacity of a battery, has high efficiency of serving as the negative electrode active material of the battery for the first time and has a stable structure, high heat stability and high cycling stability, and the tap density of the material is obviously improved. The negative electrode active material prepared by the method is in an amorphous state; the volume change is little in a lithium embedding process; the quality specific capacity can reach twice of the theory specific capacity of the existing commercial graphite. The negative electrode active material is simple, easily available, easy to prepare, low in cost and easy to apply commercially, and establishes a basis for the development of lithium ion batteries.

The invention provides a non-cyanide copper-tin alloy plating solution, wherein the copper-tin alloy plating solution comprises the following main components: stannous pyrophosphate and copper pyrophosphate, potassium pyrophosphate or sodium pyrophosphate as main complexing agent, succimide as auxiliary complexing agent, and soluble dihydric phosphate as buffering agent. The operating conditions of the non-cyanide plating solution are as follows: the pH range is 7.0-9.5; the current density is 0.3-2.5 A / dm2; and the temperature is 20-40 DEG C. The non-cyanide copper-tin alloy plating solutionhas the advantages of being low in cost, simple and convenient for operation and maintenance, and having little toxicity or no toxicity, wide density range of cathode current, high current efficiency, fine and bright plating; and the non-cyanide copper-tin alloy plating solution can satisfy the application requirements in multiple fields such as decoration plating, functional plating and the like.

The invention provides a high-quality high-yield cultivation method of Cuiguan pears, and relates to the technical field of Cuiguan pear planting. The method comprises the following steps of grafting; complementary planting, wherein pollination trees are subjected to complementary planting, partial pollination varieties are top-grafted to main cultivated varieties, and then flowering and pollination can be conducted in the next year; pollen collection, wherein dew-free bursting flower buds or newly-bloomed flowers are collected after 10 a.m., pollen of the dew-free bursting flower buds or newly-bloomed flowers are spread on bright and clean paper at the room temperature ranging from 20 DEG C to 28 DEG C, anthers burst open after eight hours, and pollen is sprinkled out, collected and applied; pollination, wherein pollen is matched with diluent to be diluted and then sprayed on flowers, pollen liquid is sprayed to the flowers at noon, and the diluent for dilution is prepared from, by weight, 1 part of boronic acid, 8 parts of bentonite, 3 parts of gelatin, 1 part of stannous pyrophosphate, 2 parts of potassium tripolyphosphate and 1,000 parts of purified water; chemical fruit retention. The high-quality high-yield cultivation method of the Cuiguan pears is high in graft survival rate, high in resistance of grafted Cuiguan pear saplings, good in pollination effect, green and environmentally friendly.

The invention discloses a luminous aluminum pigment for water-based paint and a preparation method of the luminous aluminum pigment. The luminous aluminum pigment for water-based paint is prepared from the following raw materials in parts by weight: 56-72 parts of modified aluminum power, 12-18 parts of diglycolamine, 4-8 parts of glycidyl tert-carbonate, 16-22 parts of calcium molybdate, 1-2 parts of 2-methyl-4-isothiazolin-3-one, 2-4 parts of stannous pyrophosphate, 10-15 parts of tripropyl powder, 1-2 parts of inositol hexaphosphat, 3-6 parts of sodium caseinate, 2-4 parts of zinc oxide, 1.5-2.5 parts of PPG-m-PEG-n Tallowaminopropylamine, 1-2 parts of parachlormetaxylenol and 2.5-4.5 parts of urotropin. The luminous aluminum pigment prepared has excellent comprehensive performance, has excellent covering power, waterproof performance, heat performance and weather fastness, has very good dispersity in a water-containing system and can be widely used in various types of water-based paint.

The present invention relates to an oral care composition with a high water content which has improved robustness towards microbial challenge. The oral care composition includes compositions comprising from 0.125 wt % to 0.75 wt % of a water soluble source of stannous ions, wherein the composition comprises at least 50 wt % water and wherein the source of stannous ions is selected from the group consisting of stannous chloride, stannous pyrophosphate, stannous formate, stannous acetate, stannous gluconate, stannous lactate, stannous tartrate, stannous oxalate, stannous malonate, stannous citrate, stannous ethylene glyoxide, and mixtures thereof.

An oral care composition comprising zinc phosphate, sodium fluoride, stannous pyrophosphate, and an organic acid buffer system, as well as methods of using the same.

The invention provides an active anode material, a preparation method thereof and a lithium ion battery. The active anode material comprises a core and a shell covering the outer surface of the core,wherein the core comprises an amorphous stannous pyrophosphate matrix as well as a silicon material and a carbon material which are dispersed in the amorphous stannous pyrophosphate matrix, and the shell is carbon. The preparation process is simple, and the anode active material has good cycle performance and excellent rate performance.

The present invention relates to an oral care composition with a high water content which has improved robustness towards microbial challenge. The oral care composition includes compositions comprising from 0.125 wt % to 0.75 wt % of a water soluble source of stannous ions, wherein the composition comprises at least 50 wt % water and wherein the source of stannous ions is selected from the group consisting of stannous chloride, stannous pyrophosphate, stannous formate, stannous acetate, stannous gluconate, stannous lactate, stannous tartrate, stannous oxalate, stannous malonate, stannous citrate, stannous ethylene glyoxide, and mixtures thereof.

This invention relates to oral care compositions comprising a zinc source comprising zinc oxide and zinc citrate; a stannous source comprising stannous pyrophosphate; a fluoride ion source comprising sodium fluoride; and an organic buffer, as well as to methods of using and of making these compositions.

The invention provides a planting method of jade pears, and relates to the technical field of planting of jade pears. The planting method comprises the following steps of performing grafting: performing complementary planting, performing complementary planting of pollination trees, and performing top grafting of part of trees of pollination varieties on main planting varieties, so that blooming and pollination can be realized the next year; collecting pollens: after 10 a.m., collecting dew-free budding flower buds or flowers just blooming, taking pollens, spreading the taken pollens on bright and clean paper, placing the bright and clean paper with the pollen at room temperature of 20-28 DEG , after 8 hours, enabling anther to puff, enabling the pollens to be sprinkled, and collecting the pollens for application; performing pollination: compounding the pollens with a diluent for dilution, spraying the diluted pollen liquid to flowers, and spraying the diluted pollen liquid to the flowers at noon, wherein the diluent for dilution is prepared from the following components in parts by weight: 1 part of boric acid, 8 parts of bentonite, 3 parts of gelatin, 1 part of stannous pyrophosphate, 2 parts of potassium tripolyphosphate and 1000 parts of purified water; and performing chemical fruit protection. According to the planting method disclosed by the invention, the grafting survival rate is high, the grafted jade pear tree seedlings are high in stress resistance, the pollination effects are good, and the planting method is environmentally-friendly.

The invention relates to a wonhwang pear planting method and relates to the technical field of wonhwang pear planting. The wonhwang pear planting method comprises the steps of grafting; complementary planting: performing complementary planting of pollination trees and performing top grafting of a part of pollination varieties on main cultivated varieties so that flowering and pollination can be carried out in the second year; pollen collection: collecting dew-free flower buds ready to burst or flowers just coming out after 10:00am, collecting the pollen thereof and spreading the pollen on a piece of clean paper to place the same at the room temperature of 20-28 DEG C, anthers bursting open after 8 hours and scattering the pollen which is collected and used; pollination: mixing the pollen and a diluent for dilution, spraying the mixture on flowers, and spraying the pollen solution on flowers at noon, wherein the diluent for dilution contains, in parts by weight, 1 part of boric acid, 8 parts of bentonite, 3 parts of gelatin, 1 part of stannous pyrophosphate, 2 parts of potassium tripolyphosphate, and 1000 parts of pure water; chemical fruit retention. The method has the advantages that the grafting survival rate is high; the grafted wonhwang pear seedlings have great stress resistance; the pollination effect is good; the method is environmentally-friendly.

The invention discloses a pear tree and tea plant interplanting method, and relates to the technical field of tea plant planting. The method comprises the following steps that ditching and application of base fertilizer are carried out in early spring, deep ditches with the width of 0.3-0.5 m and high ridges with the width of 1.4-1.8 m are formed, pear seedlings are transplanted to the high ridges to be planted at the intervals of 1.8-2.4 m, meanwhile, and the pear seedlings are earthed by 3-5 cm, wherein earth comprises dried mud soil, carbendazim, bentonite, stannous pyrophosphate, plant stone, brassinolide and gibberellin; every two tea seedlings are planted in each row of the deep ditches in the spring in the same year at the interval of 0.25-0.35 m, the top heights of the tea seedlings and the pear seedlings are the same, and water and fertilizer management is carried out; sprouts of the pear plants in the juvenile stage are pruned by 1 / 4-1 / 3, trunk lateral branches of the pear plants in the growing stage are pruned by 1 / 3-2 / 3, and tops are removed in the fifth year for crown culture. Water and fertilizer management is easier, growth of the tea plants and the pear trees is promoted, and the survival rate is improved; fertilizer and water waste is reduced, and the planting cost is reduced.

The invention relates to toothpaste for helping digestion and promoting appetite and a preparation method thereof. The toothpaste comprises, by mass, 3-9 parts of chalk, 1-5 parts of xanthan gum, 0.7-3 parts of silica aerogel, 0.8-3.5 parts of sodium metaphosphate, 0.15-0.45 part of sodium monofluorophosphate, 0.1-0.6 part of alkyldimethyl benzylammonium chloride, 0.05-0.25 part of sodium chloride, 0.03-0.08 part of stannous pyrophosphate, 0.002-0.006 part of copper sulfate pentahydrate, 0.1-0.3 part of titanium dioxide, 0.02-0.06 part of sodium dihydrogen phosphate, 0.2-0.7 part of vitamin C, 0.08-0.15 part of essence, 3.2-8.5 parts of water, 1-5 parts of malt, 1-5 parts of radish seeds and 1-5 parts of green tangerine peel. The toothpaste has the functions of helping digestion and promoting appetite.

The invention discloses a water-based velvet effect auxiliary agent applicable to synthetic leather, and relates to the technical field of synthetic leather functional auxiliary agents. The water-based velvet effect auxiliary agent applicable to the synthetic leather is prepared from the following raw materials in parts by weight: 15 to 20 parts of down fiber / polyvinylpyrrolidone, 5 to 10 parts of soybean protein fiber / poloxamer, 3 to 5 parts of microcrystalline cellulose / chitosan, 2 to 3 parts of cationic polyacrylamide, 2 to 3 parts of polyvinyl alcohol modified active argil, 1 to 2 parts of sodium carboxymethylcellulose, 0.5 to 1 part of polyethylene glycol 4000, 0.5 to 1 part of polyoxyethylene, 0.3 to 0.5 part of polyaluminium ferric sulfate chloride, 0.1 to 0.3 part of nanometer titanium dioxide powder, 0.05 to 0.1 part of stannous pyrophosphate and 100 to 150 part of water. The prepared water-based velvet effect auxiliary agent is added into waterborne polyurethane slurry and can be well blended and compatible with film forming raw materials, so that the processed and made synthetic leather has the characteristics of soft hand feeling, smooth velvet surface and uniform velvet hair; the hand feeling is similar to that of real leather; the use quality of a manufactured synthetic leather product is improved.

The invention discloses a method for preparing stannous pyrophosphate by utilizing stannous chloride high-iron waste liquor. The method comprises the following steps of (1) solution preparation: weighing sodium pyrophosphate, dissolving into water, and preparing a sodium pyrophosphate solution; (2) metathetical reaction: adding the sodium pyrophosphate solution to a reaction vessel, stirring, increasing temperature, then slowly dropping into the stannous chloride high-iron waste liquor, stopping dropping when the pH of reaction liquid is reduced to 2-3, reducing the pH to 0.5-1 by using acid, and then preserving the temperature for reaction; (3) after the reaction is finished, carrying out cooling, solid-liquid separation, washing and drying on a product to obtain a stannous pyrophosphate finished product. According to the invention, the stannous chloride high-iron waste liquor is taken as a raw material to react with the sodium pyrophosphate solution, various indexes of the product stannous pyrophosphate are controlled through concentration, temperature and the pH of the reaction liquid; the obtained product has the advantages of high purity, simple process, low cost and environmental friendliness, provides a new way for the recycling of the stannous chloride high-iron waste liquor and meets the requirement for circular economy.

The invention discloses a method for plating a high-tin aluminum-based bearing bush with matt tin. The method comprises the following steps: (1) carrying out pretreatment, specifically, carrying out cleaning and oil removal treatment on the high-tin aluminum-based bearing bush; (2) carrying out zinc dipping, specifically, placing the high-tin aluminum-based bearing bush subjected to the pretreatment in the step (1) in a zinc dipping solution, wherein the zinc dipping time is 2-3min, and the zinc dipping temperature is 20-25 DEG C; (3) carrying out water washing; (4) carrying out tin plating, specifically, placing the high-tin aluminum-based bearing bush subjected to the water washing in a tin plating solution and carrying out tin plating treatment, wherein the tin plating solution comprises the following components with the following concentrations: potassium pyrophosphate with a concentration of 250-300g / L, ammonium citrate with a concentration of 50-100g / L, stannous pyrophosphate with a concentration of 20-50g / L and antioxidant with a concentration of 1-5g / L; and (5) carrying out drying after the water washing to obtain the high-tin aluminum-based bearing bush plated with matt tin. The method is capable of solving the problem that a tin-plated layer and an aluminum base are difficultly combined, and realizing electroplating for the high-tin aluminum-based bearing bush with matt tin.

The invention discloses electroplate liquid and an electroplate method for gelatin cyanide-free plated Cu-Sn alloy. The electroplate liquid is composed of 8-12 g / L of copper pyrophosphate in terms of copper, 34-46 g / L of stannous pyrophosphate in terms of tin, 135-155 g / L of alkali metal pyrophosphate in terms of pyrophosphate radicals, 0.1-0.3 g / L of gelatin and 2-8 g / L of heliotropin. According to the electroplate liquid, the copper pyrophosphate serves as main copper salt, the stannous pyrophosphate serves as main tin salt, the alkali metal pyrophosphate serves as coordination agents, the gelatin serves as brightening agents, and the heliotropin serves as auxiliary brightening agents, so that the obtained electroplate liquid is good in dispersion capacity and covering capacity, cathode currents are high in efficiency, and the electroplate liquid is excellent in performance. By the adoption of the electroplate liquid, plating obtained through electroplating under the alkaline condition is low in porosity, high in brightness and good in quality.

The invention discloses a recycling treatment method for stannous pyrophosphate waste slag. The recycling treatment method comprises the following steps: (1) adding concentrated acid into the stannous pyrophosphate waste slag to be dissolved; filtering to obtain a filtering solution for later use; (2) heating alkali liquid to 70-90 DEG C and dripping the filtering solution until the pH is 2-4 under an agitating state and preserving the heat to react for 30-60 minutes to obtain a mixed solution; (3) centrifuging and drying the mixed solution; and washing and drying in vacuum to obtain a stannous pyrophosphate product. The invention provides the recycling treatment method for the stannous pyrophosphate waste slag so that the produced waste slag is reused and the waste of resources is reduced; a tin metal resource is recycled, the utilization rate of the resource is improved and the direct yield of the product is improved.

The invention relates to a method for preparing high-purity stannous pyrophosphate. The method comprises the following steps of using water with air removed to respectively dissolve soluble stannous salt and soluble pyrophosphate, vacuumizing to remove air in solution and a reactor, controlling the temperature to be between 50 and 80 DEG C, and under stirring, mixing the two kinds of raw material solution to react; then sealing the reactor, cooling the reactant to room temperature, filtering the reactant, washing the deposit, and centrifuging the deposit to dry the deposit; and adding the deposit into water to disperse the deposit, pumping the air, controlling the temperature to be between 50 and 80 DEG C, stirring, washing, cooling the reactant to room temperature, filtering andcentrifuging the deposit to dry the deposit, and drying the deposit in vacuum to obtain a high-purity white powered stannous pyrophosphate product. The stannous pyrophosphate content in the stannous pyrophosphate product is greater than 99 percent. The stannous pyrophosphate prepared by the method is high in purity, large in crystalline grains and easy to wash. The method is simple and convenient to popularize and use.

A well-anticorrosive paint for metals is made from, by weight, 3 to 5 parts of polyurethane adhesive, 1 to 4 parts of polyethylene wax anti-settling agent, 3 to 5 parts of turpentine, 2.5 to 4 parts of anti-ageing agent MB, 3 to7 parts of glycidyl tertcarbonate, 2.5 to 3 parts of parachlorometaxylenol, 3 to 5 parts of stannous pyrophosphate, 1 to 3 parts of zinc oxide, 5 to 8 parts of butyl stearate, 1.5 to 3 parts of pearl white, 4 to 6 parts of silicon dioxide, 2 to 4 parts of propylene glycol, 1 to 2 parts of mica, 12 to 16 parts of mixed solvent, 8 to 12 parts of Fuchsia sawdust, and 5 to 11 parts of TiO2. The well-anticorrosive paint is high in adhesion, free of shedding or powdering, high in corrosion resistance, less prone to ageing and wear, smooth and self-cleanable, and friendly to the environment.

The invention provides a negative electrode active material and a preparation method thereof. The negative electrode active material comprises stannous pyrophosphate, and tin and carbon which are positioned on the surface of the stannous pyrophosphate. The negative electrode active material prepared by the method can be used for obviously improving the reversible specific capacity of a battery, has high efficiency of serving as the negative electrode active material of the battery for the first time and has a stable structure, high heat stability and high cycling stability, and the tap density of the material is obviously improved. The negative electrode active material prepared by the method is in an amorphous state; the volume change is little in a lithium embedding process; the quality specific capacity can reach twice of the theory specific capacity of the existing commercial graphite. The negative electrode active material is simple, easily available, easy to prepare, low in cost and easy to apply commercially, and establishes a basis for the development of lithium ion batteries.

The invention relates to a cable material, in particular to a high toughness and abrasion resistant PVC resin cable material and a preparation method thereof. The cable material is prepared from, by weight parts, 0.1-0.3 part of cerium oxide, 4-6 parts of tetraethyl orthosilicate, 18-25 parts of calcium bentonite, 1-3 parts of stannous pyrophosphate, 2-3 parts of zinc stearate, 50-60 parts of PVC resin, 6-8 parts of polyethylene wax, 2-5 parts of coumarone, 15-20 parts of isotactic polypropylene, 10-12 parts of trioctyl trimellitate, 5-8 parts of color concentrate, 15-20 parts of aluminium hydroxide, 6-8 parts of polytetrafluoroethylene micropowder and 2-3 parts of adjuvant. According to the cable material, the PVC resin is utilized as the basic material, high molecular materials, such as the isotactic polypropylene, the polytetrafluoroethylene micropowder and so on are auxiliary materials, the mechanical capacity and the processing performance of the PVC resin are improved, the raw material comprises compound filler made from calcium bentonite carrying the cerium oxide, the stannous pyrophosphate and the tetraethyl orthosilicate, and the good reinforcement function is brought into play.

The invention discloses a processing material for an ear washing ball applied to chemical pharmaceutical analysis and relates to the technical field of analysis products. The processing material is prepared from, by weight, 25-30 parts of polyether rubber powder, 10-15 parts of novolac epoxy, 8-12 parts of terpene resin, 6-11 parts of rosin pentaerythrityl ester, 5-9 parts of teflon, 4-8 parts of volcanic ash, 4-8 parts of ethylene-eva ethylene, 4-8 parts of butyral resin, 3-6 parts of asbestos wool, 3-6 parts of petrol coke powder, 3-6 parts of polyvinyl acetate, 2-4 parts of camellia sinensis, 2-4 parts of portland cement, 2-4 parts of bamboo powder, 1-2 parts of molecular sieve powder, 1-2 parts of sulfide lard, 1-2 parts of polytetrahydrofuran, 1-2 parts of epoxidized soybean oil, 0.5-1 part of glass fiber powder, 0.5-1 part of terpilenol, 0.5-1 part of polyamide wax, 0.3-0.5 part of nanometer antimony trioxide and 0.3-0.5 part of stannous pyrophosphate. The processing material is good in processing forming, high in toughness, good in corrosion resistance, pressure resistance, abrasion resistance and weather resistance and capable of being recycled, and waste of resources is reduced.

The invention discloses a modified halloysite for a flame-retardant polypropylene cable sheath material and a preparation method thereof. The modified halloysite is prepared from the following raw materials in parts by weight: 54-68 parts of halloysite, 11-17 parts of acetylenyl cyclohexanol, 4-9 parts of zinc hydroxystannate, 2-3 parts of triglycidyl p-aminophenol, 2.5-4.5 parts of isopropyl palmitate, 1-2 parts of yttrium naphthoate, 10-15 parts of tri-n-hexyl acetylcitrate, 5-10 parts of slaked lime, 8-14 parts of scrap rubber powder, 3-4 parts of butylated hydroxyanisole, 1.5-2.5 parts of stannous pyrophosphate, 10-15 parts of isopropylated triphenyl phosphate, 5-10 parts of tetrabromobisphenol A-bis(2,3-dibromopropyl ether), 1-2 parts of 2- hydroxy-4-methoxy diphenyl ketone, 1-2 parts of 4,4'-dihydroxydiphenyl and 3.5-6.5 parts of assistant. The modified halloysite has the advantages of favorable compatibility with polypropylene, high interfacial binding force and excellent dispersity in the polypropylene base, has an obvious reinforcing action on the polypropylene, enhances the mechanical properties of the polypropylene cable sheath material, and can enhance the thermal aging resistance, abrasion resistance and flame retardancy of the polypropylene cable sheath material.

This invention relates to oral care compositions comprising a first source of stannous, a second source of stannous, wherein the second source of stannous contains stannous pyrophosphate, and a zinc source selected from the group consisting of: zinc oxide, zinc citrate, zinc lactate, and combinations thereof, as well as to methods of using and of making these compositions.