Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1987-08-14
1990-06-26
Kight, III, John
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
521161, C08G 1874, C08G 1875
Patent
active
049370120
ABSTRACT:
Low temperature stable polymethylene polyphenylene polyisocyanates are composed of crude polymethylene polyphenylene polyisocyanate containing from about 50 to about 80 percent by weight 2-ring diphenylmethane diisocyanate wherein from about 65 to about 93 weight percent of the 2-ring diisocyanate is 4,4'- and from about 7 to about 35 weight percent is 2,4'- and furthermore the composition contains from about 1 to about 5 weight percent carbodiimide-uretonimine structure. The polyisocyanates are useful in preparing polyurethane foams.
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Kan Peter T.
Lightsey John W.
BASF Corporation
Daley Dennis R.
Hurley Jr. Rupert B.
Kight III John
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