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Syntheses and reactions of urethanes of cellobiose and cellulose‐containing uretdione groups
Author(s) -
MeyerStork L. Sebastian,
Höcker Hartwig,
Berndt Heinz
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070440613
Subject(s) - reactivity (psychology) , chemistry , cellulose , acetamide , isocyanate , amine gas treating , organic chemistry , polymer chemistry , chloroacetyl chloride , yield (engineering) , polyurethane , catalysis , chloride , cellobiose , acryloyl chloride , lithium chloride , materials science , medicine , monomer , acrylate , cellulase , polymer , alternative medicine , pathology , metallurgy
Urethanes of cellobiose and cellulose‐containing uretdione groups are synthesized by the reaction of aliphatic and aromatic diisocyanate uretdiones with the saccharides. The syntheses are performed as a heterogeneous reaction in dimethyl acetamide using dibutyl tin dilaurate as a catalyst, as well as a homogeneous reaction in dimethyl acetamide‐lithium chloride. Thus, Semisynthetic prepolymers are formed that offer the reactivity of (blocked) isocyanate groups. To demonstrate their reactivity, ring opening of the uretdiones is performed by the addition of a secondary amine to yield the corresponding ureas.