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The Preparation of Carbodiimides from Isocyantes
Author(s) -
Neumann W.,
Fisher Peter
Publication year - 1962
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.196206211
Subject(s) - carbodiimide , chemistry , isocyanate , steric effects , cleavage (geology) , adduct , catalysis , polymer chemistry , organic chemistry , combinatorial chemistry , materials science , polyurethane , composite material , fracture (geology)
Abstract Carbodiimides are formed with simultaneous evolution of CO 2 by the reaction of basic catalyst with sterically hindered isocynates. Another generally applicable synthesis of carbodiimides involves intermediate formation of cyclic adducts of isocyanates and carbodiimides, which, upon cleavage, exchange the isocyanate and carbodiimide functions. Both processes are suitable for the preparation of polycarboiimides. Several commercial applications of mono‐ and polycarbodiimides are pointed out.