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Title:
PRODUCTION OF POLYISOCYANATE HAVING IMINO- OXADIAZINEDIONE GROUP
Document Type and Number:
Japanese Patent JP2000086640
Kind Code:
A
Abstract:

To provide a method for producing a product having imino- oxadiazinedione group, whose content is improved in a trimer mixture, without need of handling hydrofluoric acid in the production of a catalyst.

This method comprises subjecting a starting isocyanate having a number average molecular weight of 140-600 and selected from organic di- or polyisocyanates each having isocyanate groups associated with an aliphatic, alicyclic and/or araliphatic group to contact trimerization in the presence of a quaternary ammonium corresponding to the formula R4E+F- (E is N or P; R is a 1-20C aliphatic, aromatic and/or araliphatic appropriately having identical or different branched chains or the like) and a phosphonium fluoride trimerizing catalyst to yield a trimerized polyisocyanate having imino-oxadiazinedione groups (asymmetric trimer) at ≥30 mol% in the trimer mixture.


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Inventors:
RICHTER FRANK
GROTH STEFAN DIPL CHEM DR
STELTER EBERHARD
LITZ WILFRIED
Application Number:
JP15218199A
Publication Date:
March 28, 2000
Filing Date:
May 31, 1999
Export Citation:
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Assignee:
BAYER AG
International Classes:
B01J31/02; C07B61/00; C07C265/14; C07D251/34; C07D273/04; C08G18/02; C08G18/16; C08G18/78; C08G18/79; (IPC1-7): C07D273/04; B01J31/02; C07C265/14
Domestic Patent References:
JPH02258771A1990-10-19
JPH0211554A1990-01-16
JPH10137578A1998-05-26
JPH09268212A1997-10-14
JPH03262538A1991-11-22
JPH02107337A1990-04-19
JPH02258771A1990-10-19
JPH0211554A1990-01-16
JPH10137578A1998-05-26
JPH09268212A1997-10-14
JPH03262538A1991-11-22
JPH02107337A1990-04-19
Other References:
JPN6009060495, NAMBU, Y., "Synthesis of Novel Aromatic Isocyanurates by the Fluoride−Catalyzed Selective Trimerization of Isocy", Journal of Organic Chemistry, 1993, 58(7), p. 1932−1934
Attorney, Agent or Firm:
Kawahara Kazuho