Improvement in the synthesis of tributyltin lithium

Details Improvement in the synthesis of tributyltin lithium Improvement in the synthesis of tributyltin lithium

C - Chemistry, Metallurgy

07

F

C07F 7/22 (2006.01) C08F 4/58 (2006.01) C08F 36/04 (2006.01) C08F 236/12 (2006.01)

Patent

CA 2224397

Triorgano substituted-tin lithium initiators are made in a dimethyl ether solvent. The substitution of dimethyl ether as the solvent for the traditional tetrahydrofuran solvent results in an initiator for anionic polymerizations that can produce less 1,2-vinyl repeat units. The dimethyl ether is also easier to remove from the polymerization media because it has a boiling point at one atmosphere of minus 24.8°C and thus is a gas at 25°C.

Initiateurs de type dérivé lithium de triorganoétain, synthétisés dans un solvant de type éther diméthylique. En remplaçant l'éther diméthylique par un solvant courant comme le tétrahydrofurane, on obtient un initiateur pour les polymérisations anioniques produisant moins d'oligomères 1,2-vinyle. De plus, l'éther diméthylique est plus facile à éliminer du milieu réactionnel à cause de son faible point d'ébullition de moins 24,8 degrés C à une atmosphère, qui correspond à l'état gazeux à 25 degrés C.

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