Polymers of aspartic acid with sequestering activity process for their preparation and use thereof
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United States of America Patent
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Aug 10, 1999
Grant Date -
N/A
app pub date -
Mar 22, 1996
filing date -
Mar 23, 1995
priority date (Note) -
Expired
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Abstract
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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