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Title: Process for the preparation of liquid carbodiimide-modified organic polyisocyanates employing organotin catalysts

Abstract: Carbodiimide-modified organic polyisocyanates are prepared by heating polyisocyanates in the presence of a catalytically sufficient amount of an organotin compound.


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Inventors: Narayan, Thirumurti (Grosse Ile, MI, US)

Application Number: 067793
Filing Date: 1979-08-20
Publication_date: 1980-10-14
Assignee: BASF Wyandotte Corporation (Wyandotte, MI)
Primary Class(es): 560/334 521/901, 548/951
Other Classes:
US Patent Ref:
3573335Mar, 1971Yurimoto et al.260/453.
4088665May, 1978Findeisen et al.260/453.
4143063Mar, 1979Alberino et al.260/453.
4154752May, 1979Sundermann et al.260/453.

Other Refs:
Primary Examiner: Torrence, Dolph H.
Assistant Examiner:
Attorney: Lisicki; Norbert M.