Polyisocyanate compositions

Details Polyisocyanate compositions Polyisocyanate compositions

1978-02-22

1979-05-01

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252182, 260453AM, 521159, 528 52, 528 59, 560 26, C07C119048, C07C12506, C08G 1820

Patent

active

041523490

ABSTRACT:
The reactivity of polymethylene polyphenyl isocyanates containing 20 to 90 percent of methylenebis(phenyl isocyanates) is improved, and stabilized against a decline on storage, by incorporating therein very small amounts of a compound of the formula ##STR1## wherein R.sub.1 =alkyl, aryl; R.sub.2 =alkyl; R.sub.3 =H, alkyl or aralkyl; and R.sub.1 and R.sub.2 taken together represent the residue of an oxazoline or oxazine. 2-Ethyloxazoline is the preferred compound for incorporation in the polyisocyanate.

REFERENCES:
patent: 2817663 (1957-12-01), Conlon et al.
patent: 3914189 (1975-10-01), Rudner et al.

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