Aromatic polycarbodiimide and film thereof

Details Aromatic polycarbodiimide and film thereof Aromatic polycarbodiimide and film thereof

1998-02-05

1999-12-28

Yoon, Tae

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

524195, 528491, 525907, 564252, C08G 1828, C07C26700

Patent

active

060083115

ABSTRACT:
A polycarbodiimide having excellent heat resistance and humidity resistance, which comprises a structural unit represented by the following formula (A) ##STR1## wherein R represents a divalent organic group represented by any one of the following formulae (I) and (II), n is an integer of 2 to 400 ##STR2## wherein X.sub.1 to X.sub.4 independently represent a hydrogen or an alkyl group having 1 to 3 carbon atoms.

REFERENCES:
patent: 4111914 (1978-09-01), Kresta et al.
patent: 5109097 (1992-04-01), Klun et al.
Lyman, Donald J. and Nasser Sadri. "Polycarbodiimides and their Deriviatives." Die Makromolekulare Chemie. 67, (1963) 1-9.
Greber, G. and H.R. Krichildorf. "A New Synthesis of Isocyanates and Isothiocyanates." Angew. Chem. International Edition. 7, (1968), 941.
Campbell, Tod W. and Kenneth C. Smeltz. "Carbodiimides. IV. High Polymers Containing the Carbodiimide Repeat Unit." The Journal of Organic Chemistry. 28, (1963), 2069-2075.

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