公开(公告)号：US06545172B1

公开(公告)日：2003-04-08

申请号：US10124850

申请日：2002-04-18

申请人： Vidyanatha A. Prasad ,  Klaus Jelich ,  Dennis E. Jackman

发明人： Vidyanatha A. Prasad ,  Klaus Jelich ,  Dennis E. Jackman

IPC分类号： C07C33300

CPC分类号： C07C337/02

摘要： A process for the production of methyl dithiocarbazinate includes the steps of providing a mixture comprising hydrazine, solvent, carbon disulfide and base; adding methyl bromide to the mixture; cooling the reaction mixture; and recovering methyl dithiocarbazinate. The methyl dithiocarbazinate may be recovered by filtering the reaction mixture to yield a solid methyl dithiocarbazinate retentate and a liquid filtrate; acidifying the filterate with a mineral acid; and adding methyl isobutylketone to the acidified filterate.

摘要翻译： 制备二硫代肼基甲酸甲酯的方法包括提供包含肼，溶剂，二硫化碳和碱的混合物的步骤; 向混合物中加入甲基溴; 冷却反应混合物; 并回收二硫代肼基甲酸甲酯。 可以通过过滤反应混合物回收二硫代肼基甲酸甲酯，得到二硫代肼基甲酸固体甲基季戊四醇酯和液体滤液; 用无机酸酸化过滤物; 并向酸化的过滤器中加入甲基异丁基酮。

公开(公告)号：US06518448B2

公开(公告)日：2003-02-11

申请号：US09963174

申请日：2001-09-25

申请人： Han Ting Chang ,  Dominique Charmot ,  Yunxiao Li

发明人： Han Ting Chang ,  Dominique Charmot ,  Yunxiao Li

IPC分类号： C07C33300

CPC分类号： C08F2/38

摘要： Control agents that have a nitrogen-nitrogen bond covalently bonded to a thiocarbonyl moiety are provided for living-type free radical polymerization of a wide variety of monomers. These control agents provide superior properties for control of the polymerization and/or the properties of the polymers obtained and/or the monomers that may be polymerized. In some embodiments, a bulky group is pendant off the activated thiocarbonyl portion of the control agents. Multifunctional control agents provide the opportunity for a variety of structurally unique polymers, including block copolymers, stars and hyper-branched polymers.