Process for the preparation of a polycarbodiimide solution

Details Process for the preparation of a polycarbodiimide solution Process for the preparation of a polycarbodiimide solution

1996-06-04

1998-05-12

Hampton-Hightower, Patricia

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

Synthetic resins

From carboxylic acid or derivative thereof

528126, 528170, 528322, 528332, 528353, 528367, 525419, 525420, C08G 7310, C08G 1802

Patent

active

057506370

ABSTRACT:
This invention provides a process for the preparation of a polycarbodiimide solution wherein the polycarbodiimide is synthesized by heating an organic diisocyanate (e.g., 2,4-tolylene diisocyanate or 2,6-tolylene diisocyanate) in the presence of a carbodiimidation catlayst characterized in that a non-chlorinated aromatic hydrocarbon is used as the solvent and the resulting polycarbodiimide has a number average molecular weight from about 3,000 to about 10,000; wherein the synthesis is performed in the temperature range of from about 100.degree. to about 120.degree. C.

REFERENCES:
Tod W. Campbell, et al "High Polymers Containing the Carbodiimide Repeat Unit" J. Org. Chem., pp. 2069-2075 Aug. 1963.
Donald J. Lyman, et al, "Polycarbodiimides and Their Derivatives", Die Maktomol. Chem. 67, pp. 1-9, Apr. 1963.

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