Policarboxylic acids
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United States of America Patent
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Sep 2, 1997
Grant Date -
N/A
app pub date -
Jun 20, 1996
filing date -
Jun 20, 1996
priority date (Note) -
Expired
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Abstract
The present invention relates to a process for the preparation of crosslinked polymers and copolymers of acrylic acid and methacrylic acid of formula ##STR1## wherein R.sub.1 is hydrogen or methyl. Said process, using ethyl formate as solvent, allows to obtain polymers having low residue of monomer and of solvent and with higher thickening capacity.
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