Polyisocyanate compositions having a long shelf life and obtaina

Details Polyisocyanate compositions having a long shelf life and obtaina Polyisocyanate compositions having a long shelf life and obtaina

1996-05-13

1998-03-17

Niland, Patrick D.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

560330, 560331, 560332, 560333, C09K 300, C07C24900, C07C25100, C07C25700

Patent

active

057283176

ABSTRACT:
(Cyclo)aliphatic polyisocyanate compositions which have a long shelf life, are obtainable by phosgene-free methods, preferably by thermal cleavage of (cyclo)aliphatic polycarbamates, and, for stabilization, contain at least one primary stabilizer (2a), preferably a sterically hindered phenol and/or an aromatic amine, or at least one secondary stabilizer (2b), preferably an organic phosphite and/or a thioether, or at least one acidic stabilizer (2c), preferably a carboxylic acid, an acyl chloride, an inorganic acid, an inorganic acid chloride and/or a diester of phosphoric acid, or a stabilizer system comprising at least 2 of the stabilizers (2a) to (2c), a process for the preparation of the (cyclo)aliphatic polyisocyanate compositions and their preferred use for the preparation of isocyanurate-containing polyisocyanates.

REFERENCES:
patent: 3247237 (1966-04-01), Hagemeyer, Jr.
patent: 4828753 (1989-05-01), Robin
patent: 5087739 (1992-02-01), Bohmholdt et al.
patent: 5175349 (1992-12-01), Gupta et al.
patent: 5258548 (1993-11-01), Imokawa
patent: 5360931 (1994-11-01), Bohmholdt et al.
EPO Search Report dated Dec. 27, 1994; Translation of EPO Search Report.

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