Tin solvent metal for artificial joints

espacenet : WO 2010117655 (A2)

Polycrystalline diamond compacts for use in artificial joints achieve reduced corrosion and improved biocompatibility through the use of solvent metal formulations containing tin and through the control of solvent metal pore size, particularly in inner layers of the compact. Solvent metal formulations containing tin have been discovered which provide sintering ability, part strength, and grind resistance comparable to levels achieved by using CoCrMo solvent metals. It has been discovered that limiting the solvent metal pore size in the diamond layers minimizes or eliminates the occurance of micro cracks in the solvent metal and significantly reduces the corrosion of the compact as manifested by the release of heavy metal ions from the compact.; Polycrystalline diamond compacts which utilize both the solvent metal formulations containing tin and the control of pore sizes achieve significantly reduced corrosion and improved biocompatibility compared to prior art polycrystalline diamond compacts

Plastics containing as flame retardant a metal powder consisting of Sn or Sn alloy

espacenet : EP 1947140 (A1)

Plastic comprises 0.01-1.5 wt.% of a first flame proofing agent a second flame proofing agent, where the first flame proofing agent is a powder comprising tin or tin alloy with a melting point of less than 350[deg] C, the second flame proofing agent is a halogenated organic compound and the sum of the first and the second flame-proofing agent is 0.1-3 wt.%

Recovery of tin from Cu3Sn + Pb smelting residue

espacenet: JP 2006045588 (A)

PROBLEM TO BE SOLVED: To provide a wet treatment method particularly suitable for treating a Sn-containing raw material mainly containing an intermetallic compound Cu3Sn and metallic Pb, such as refining dross produced in a lead smelting process. SOLUTION: The method for recovering Sn from an Sn-containing raw material includes: a step (1) of stirring the Sn-containing raw material in hot concentrated sulfuric acid to slurry; a step (2) of obtaining a leachate containing dissolved Sn, by adding water or sulfuric acid to the slurry; or further a step (3) of heating the leachate to 60[deg.]C or higher to obtain an Sn-containing precipitate.

In the step (1), the hot concentrated sulfuric acid to be used is a concentrated sulfuric acid containing 80% or higher sulfuric acid (before being mixed with the Sn-containing raw material), and is stirred at 60[deg.]C or higher. In the step (2), Sn is leached at 50[deg.]C or lower

New Photocatalytics Study Findings Recently Were Reported by...

NewsRX: A stable metalloporphyrin sensitized TiO2 (Degussa P25) photocatalyst was prepared by using trans-dihydroxo[5,10,15,20-tetraphenylporphyrin]tin(IV) (SnP) as a sensitizer in a simple impregnation process.

The solid diffuse reflectance ultraviolet-visible (UV-vis) spectrum of the SnP sensitized TiO2 photocatalyst (SnP-TiO2) indicated that there existed interaction between SnP and TiO2," scientists in Shanghai, People's Republic of China report.

"It was found that SnP-TiO2 exhibited an enhanced visible light photocatalytic activity as compared with that over P25 for the degradation of 4-nitrophenol (4-NP) and methyl orange (MO) in aqueous...

Yuntinic Resources to Exhibit and Introduce New Tin Based Heat Stabilizers

Thomasnet.com: "We are very pleased to showcase our market leading methyltin heat stabilizer technology for the vinyl plastics industry and don't miss the new exciting heat stabilizers we will introduce at NPE2012," said Steve Hulme, General Manager of Chemicals.

"We have an excellent track record servicing the PVC market with world leading tin stabilizer technology. Our philosophy of developing close and intimate customer relationships is driven by our parent company's 100 year history of supporting strong longterm strategic partnerships."