Process for metalation
Abstract
Abstract A POLYMER (EITHER A DEAD POLYMER OR A LITHIATED LIVE POLYMER) WHICH CONTAINS A PLURALITY OF OLEFINIC AND/OR ARYL GROUPS IS METALATED BY REACTING WITH (A) A HYDROCARBON LITHIUM AND (B) A COMPOUND OF AN ALKALI METAL OTHER THAN LITHIUM IN WHICH THE METAL IS ATTACHED TO A HETERO ATOM, SUCH AS A HYDROXIDE ALDOXIDE, A THIOSALT OR AN AMIDE. THE RESULTING METALATED POLYMER CAN BE REACTED TO INTRODUCE REACTIVE GROUPS OF DIFFERENT TYPES, SUCH AS CARBOXYL, HYDROXYL, ETC. ALONG THE CHAIN. FOR EXAMPLE, POLYBUTADIENE CAN BE REACTED WITH N-BUTYLITHIUM AND SODIUM OR POTASSIUM ALKOXIDE, AND THE RESULTING PRODUCT CAN THEN BE REACTED WITH STYRENE OR CARBON DIOXIDE, ETC. AND THEN NEUTRALIZED TO PRODUCE A POLYBUTADIENE CONTAINING STRYRYL OR CARBOXYL, ETC. GROUPS.
Inventors
- 👤 A Halasa
Bibliographic Details
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