Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-01-30
1978-01-10
Cockeram, H.S.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
260 2H, 260 25BF, 260 775AB, 2606065P, 20415911, 252428, 252430, 252431P, 260551CD, C08G 1816, B01J 3122
Patent
active
040678202
ABSTRACT:
The instant invention relates to novel carbodiimidization catalysts consisting of a high molecular weight, insoluble matrix and low molecular weight carbodiimidization catalysts fixed to the matrix via ionic bonds. The novel high molecular weight catalysts are suitable for the preparation of storage stable, catalyst free, equilibrium mixtures of organic carbodiimides, uretone imines and isocyanates. Either the carbodiimide, or the uretone imine or both may contain isocyanate groups. Alternatively, mono and/or polyisocyanates free from carbodiimide 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.
REFERENCES:
patent: 3126404 (1964-03-01), Flynn et al.
patent: 3714246 (1973-01-01), Smith et al.
patent: 3767708 (1973-10-01), Smith et al.
patent: 3823111 (1974-07-01), Loew et al.
patent: 3911041 (1975-10-01), Kaelling et al.
Block Hans-Dieter
Schafer Walter
Wagner Kuno
Bayer Aktiengesellschaft
Cockeram H.S.
Gil Joseph C.
Harsh Gene
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