Thermoplastic material consisting of aliphatic carbamic acid derivatives of polysaccharides and low-molecular urea derivatives as well as a process for their preparation and use of the same
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United States of America Patent
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Jun 11, 2002
Grant Date -
Jul 5, 2001
app pub date -
Apr 2, 1997
filing date -
Apr 9, 1996
priority date (Note) -
Expired
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Abstract
The present invention relates to evenly substituted polysaccharide derivatives having the general structure: polysaccharide--O--R wherein polysaccharide--O represents a substituted or unsubstituted polysaccharide unit and R is a substituent of a polysaccharide-OH group having either the structure R=--A--B-- or the structure R=--B--, wherein A is a linear polyether chain having the following structure: A=(--D--O--).sub.n wherein D denotes a linear aliphatic branched or unbranched chain having 2 to 12 C atoms, O represents an oxygen atom and n is a number equal to or greater than 1, and B represents a substituted carbamic acid having the structure ##STR1## wherein E denotes a linear or branched aliphatic chain having 1 to 18 C atoms.
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