Method for preparing crosslinked polycarbodiimides

Details Method for preparing crosslinked polycarbodiimides Method for preparing crosslinked polycarbodiimides

1996-12-04

1998-11-17

Hightower, P. Hampton

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

Synthetic resins

From carboxylic acid or derivative thereof

528170, 528322, 528353, 528373, 528374, 528375, C08G 7310, C08G 9504

Patent

active

058378014

ABSTRACT:
The method for preparing a crosslinked polycarbodiimide according to the present invention comprises reacting a polydicarbodiimide compound with a compound, which has in a molecule thereof two or more hydroxy or mercapto groups, in the presence of an alcoholate of an alkali metal or of an alkaline earth metal. The crosslinked polycarbodiimide obtained according to the method is excellent in heat resistance and mechanical properties.

REFERENCES:
patent: 2941966 (1960-06-01), Campbell
patent: 3947274 (1976-03-01), Mikawa et al.
J. Org. Chem., 28, p. 2069 Aug., (1963) "High Polymers Containing the Carbodiimide Repeat Unit".
Arch. Pharm., Verlag Chemie GmbH, vol. 305, p. 654 (Sep. 1972).
An. Quim. 67, p. 901, (Nov., 1971) "Additions do Di-(p-Nitrophenyl)-carbodiimide, Role of Nitrogen Lone Pair in Additions to Carbodiimides".
J. Org. Chem. 34, 3707 (Nov., 1969); "Alkylation by Alcohols in The Presence of Dicyclohexylcarbodiimide".
J. Chem. Soc. (C), Dec., 1968, p. 1480.

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