High molecular weight, insoluble carbodiimidization catalysts

Details High molecular weight, insoluble carbodiimidization catalysts High molecular weight, insoluble carbodiimidization catalysts

B - Operations, Transporting

01

J

402/1, 402/188,

B01J 31/06 (2006.01) C08F 299/04 (2006.01) C08G 18/79 (2006.01) C08G 63/692 (2006.01) C08G 83/00 (2006.01)

Patent

CA 1094241

ABSTRACT OF THE DISCLOSURE The instant invention relates to novel carbodiimi- dization catalysts consisting of a high molecular weight, insoluble matrix, which is capable of swelling, and low mole- cular weight carbodiimidization catalysts fixed on, in, or to the matrix via convalent bonds. The novel high molecular weight catalysts are suitable for the preparation of storage stable, catalyst-free equilibrium mixtures of organic isocyanates, carbodiimides and uretone imines. Either the carbodiimide, or the uretone imine or both may contain isocyanate groups. Alternatively, mono and/or polyisocyanates free from carbodi- imide and uretone imine groups may be added to the equilibrium mixture. The catalysts according to the invention are capable of bringing about selective carbodiimidization of individual isocyanates in a mixture of various isocyanates.

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