Process for making organotin dihalides and trihalides and stabilizers prepared therefrom

摘要

An organotin dihalide having the formula <IMAGE> OR A MIXTURE OF THE DIHALIDE AND AN ORGANOTIN TRIHALIDE IS PREPARED BY REACTING METALLIC TIN WITH AN OLEFIN HAVING THE FORMULA <IMAGE> wherein R1, R2, R3 and R4 are hydrogen or a hydrocarbon radical and at least one of R1 or R2 contains an oxygen-containing group with a carbonyl group adjacent to the olefinic double bond and Hal is a halogen. The organotin dihalide or mixture thereof with a trihalide is reacted with an acid or mercaptan to produce a stabilizer for polyvinyl chloride polymers and the like.