Thermoplastic cellulose ether ester graft copolymers and process for their production
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United States of America Patent
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Nov 14, 1995
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N/A
app pub date -
May 17, 1994
filing date -
May 24, 1993
priority date (Note) -
Expired
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Abstract
The present invention relates to novel thermoplastic, water-insoluble cellulose hydroxyalkyl hydroxycarboxylic acid esters of the general structure Cell--O--R where Cell--O is the substituted OH group of a polymeric cellulose unit and R is either a monomeric and/or polymeric hydroxyalkylether hydroxycarboxylic acid ester of the structure X: X=--A--B-- in which A is a linear polyether chain: A=(--D--O--).sub.n in which D signifies a linear aliphatic branched or unbranched chain with 2 to 11 C atoms and n is a whole number equal to or greater than 1, and B is a linear polyester chain: ##STR1## in which E signifies a linear aliphatic branched or unbranched chain with 2 to 5 C atoms and m is a whole number equal to or greater than 1, or R is equal to A or B or X and a combination thereof in any ratio, or R is equal to H (hydrogen) according to the degree of substitution per anhydroglucose unit (max. 3) with A, B or X, and a process for their production and use of these cellulose derivatives as biodegradable mouldings.
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