Secondary alkaryl amines

Schotten-Baumann reaction, 582, 584, 780, 784 see also Benzoates Sebacic acid, 469, 938,939 Secondary aliphatic amines, 413 crystalline derivatives of, 422 reactions of, 421, 1072 table of and derivatives of, 424 Secondary alkaryl amines, 562, 570, 571 Secondary aromatic amines, 559, 562 crystalline derivatives of, 652 reactions and characterisation of, 649 1173 ... 

Solution-polymerized SBR is made by termination-free, anionic/live polymerization initiated by alkyl lithium compounds. Other lithium compounds are suitable (such as aryl, alkaryl, aralkyl, tolyl, xylyl lithium, and ot/p-naphtyl lithium as well as their blends), but alkyl lithium compounds are the most commonly used in industry. The absence of a spontaneous termination step enables the synthesis of polymers possessing a very narrow molecular weight distribution and less branching. Carbon dioxide, water, oxygen, ethanol, mercaptans, and primary/secondary amines interfere with the activity of alkyl lithium catalysts, so the polymerization must be carried out in clean, near-anhydrous conditions. Stirred bed or agitated stainless steel reactors are widely used commercially. 

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