首页>
外国专利>
Bifunctional alkali metal compound, method for producing the same, and polymerization initiator comprising the compound
Bifunctional alkali metal compound, method for producing the same, and polymerization initiator comprising the compound
展开▼
机译:双官能碱金属化合物,其制备方法和包含该化合物的聚合引发剂
展开▼
页面导航
摘要
著录项
相似文献
摘要
Bifunctional initiators for anionic polymerization are prepared by reacting an alkenylaromatic compound of the general formula I IMAGE (I) where Ar is aromatic hydrocarbyl which may be substituted by alkyl or another group inert toward organoalkali metal compounds and may contain nitrogen, R1 is linear or branched alkyl, cycloalkyl, alkenyl or aralkyl or from 1 to 22 carbon atoms where at least the carbon adjacent to the double bond is saturated and aliphatic, R2 is hydrogen or is likewise linear or branched alkyl, cycloalkyl, alkenyl or aralkyl or from 1 to 22 carbon atoms where at least the carbon adjacent to the double bond is saturated and aliphatic, and where R1 and R2 may be part of a common cycloaliphatic ring, in the presence of one or more ethers and of tertiary amines and in the presence or absence of a further inert aliphatic, alicyclic or aromatic solvent, at from -20 DEG to +70 DEG C. with preferably lithium and with dimerization, with the use in addition of poly-cyclic aromatic hydrocarbons which catalytically promote the dimerization in amount of from 0.001 to 50, preferably 20, mol % and with or without the removal of the ethers and/or tertiary amines after the preparation, and are used for polymerizing anionically polymerizable monomers such as styrene.
展开▼