发明授权
US5936121A Polymers of aspartic acid with sequestering activity process for their preparation and use thereof 失效
天冬氨酸的聚合物具有螯合活性方法,用于制备和使用

Polymers of aspartic acid with sequestering activity process for their
preparation and use thereof
摘要:
An oligomer of an aspartic acid is provided having repeating monomeric units of aspartic acid of the formula: ##STR1## and by a first chain unit having formula: ##STR2## and a chain stopper unit A which is: ##STR3## wherein X is an alkali metal, R represents H or an alkyl containing from 1 to 4 carbon atoms and R.sub.1 is H or the group --COOX.
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