Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2006-04-18
2006-04-18
Gorr, Rachel (Department: 1711)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C252S182210, C548S952000, C528S044000
Reexamination Certificate
active
07030274
ABSTRACT:
The present invention relates to an improved process for the production of carbodiimide modified organic isocyanate, preferably a polymethylene polyphenylisocyanate, and most preferably diphenylmethane diisocyanate. This process includes (1) neutralizing acidic impurities in an organic isocyanate, (2) partially carbodiimidizing isocyanate groups of the neutralized organic isocyanate, and (3) terminating the carbodiimidization reaction.
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Bolton Jeffrey S.
Garrett James Thomas
Rosthauser James William
Bayer MaterialScience LLC
Brown N. Denise
Gil Joseph C.
Gorr Rachel
Whalen Lyndanne M.
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