Tin is a low-melting metal with silvery white luster. It is divalent or tetravalent in the compound and will not be oxidized by air. (cassiterite) and various sulfides (such as sulfur cassiterite). Tin and its compounds are widely used in industry, such as tin alloy, tin salt, tin powder, etc. The color of organotin compounds...
Tin is a metal element, an inorganic substance, and the common form of white tin is a silver-white luster of low melting point metal, which is divalent in the compound Or tetravalent, it will not be oxidized by air at room temperature, and it mainly exists in the form of dioxide (cassiterite) and various sulfides...
Organotin removal methods include water-soluble and solid-supported stannanes, catalytic methods, and alternative reagents based on less toxic metal and metalloid hydrides. Silica gel elution is one method to remove the organotins, followed by standard flash column chromatography to complete the purification. The second method does not require pretreatment of the product mixture because after concentration,...
Organotin catalysts refer to organic compounds containing carbon-tin bonds, which can coordinate with the -NCO group of isocyanate to polarize -NCO and make isocyanate The positively charged carbon atoms in the molecule are more active and are easily attacked by the terminal hydroxyl groups of polyol oligomers. In the synthesis of polyurethane, although the tertiary...
Organotin heat stabilizer is a kind of heat stabilizer, which can replace the unstable Cl atom on the polymer, so that the PVC resin has long-term stability and initial color Retention 1. Organotin compounds are the most effective heat stabilizers for PVC, and their stabilizing effects include both preventive and remedial types. Organotin heat stabilizer...