Stable liquid biuret modified and biuret allophanate...

Details Stable liquid biuret modified and biuret allophanate... Stable liquid biuret modified and biuret allophanate...

2005-01-04

2005-01-04

Gorr, Rachel (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C252S182210, C252S182220, C564S051000

Reexamination Certificate

active

06838542

ABSTRACT:
This invention relates to stable liquid modified diphenylmethane diisocyanates which comprise a secondary amine based biuret modified diphenylmethane diisocyanate having an NCO group content of about 12 to about 30% by weight. The present invention also relates to stable liquid biuret allophanate modified MDIs, to stable liquid prepolymers of biuret modified MDIs, to stable liquid prepolymers of biuret allophanate modified MDIs, and to processes for the preparation of these compositions.

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