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...
Reexamination Certificate
2007-02-13
2007-02-13
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...
C528S068000, C560S025000, C564S034000, C252S182200
Reexamination Certificate
active
10503366
ABSTRACT:
A process for preparing high-functionality, highly branched polyureas comprises the stepsa) reaction of an at least bifunctional capped diisocyanate or polyisocyanate with at least one at least bifunctional primary and/or secondary amine with elimination of the capping agent,b) intramolecular reaction of the reaction product from step a) to form a high-functionality, highly branched polyurea.
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BASF - Aktiengesellschaft
Gorr Rachel
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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