Catalytic partial cyclotrimerization of polyisocyanates and prod

Details Catalytic partial cyclotrimerization of polyisocyanates and prod Catalytic partial cyclotrimerization of polyisocyanates and prod

1986-03-25

1987-09-29

Jiles, Henry R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544222, 521128, 521902, 528 52, 526194, C07D25134, C08G 1802, C08F 416

Patent

active

046970142

ABSTRACT:
Storage-stable polyisocyanurate-polyisocyanates, essentially devoid of polyisocyanate monomer and dimer over time, are conveniently prepared by catalytically cyclotrimerizing an aliphatic, cycloaliphatic or aromatic polyisocyanate in the presence of a catalytically effective amount of an aminosilyl catalyst, and terminating the cyclotrimerization reaction when predetermined desired amount of isocyanurate group has been reached, by adding to the reaction mixture a reaction terminating amount of water.

REFERENCES:
patent: 4412073 (1983-10-01), Robin
patent: 4537961 (1985-08-01), Robin
Robin, Abstract E.P. 89,297 (see U.S. Pat. No. 4,537,961 for complete English translation) 9/21/83.

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