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
2007-06-28
2009-11-24
Zemel, Irina S (Department: 1796)
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...
C528S048000, C562S459000, C562S460000, C502S150000, C502S161000, C502S172000
Reexamination Certificate
active
07622540
ABSTRACT:
Disclosed herein is a metal enolate initiator for polymerizing isocyanates and a method for polymerizing isocyanates by anionic polymerization using the same, in which the initiator forms a cluster upon the initiation and protects stability of terminal anions at the end of the chain to cause controlled polymerization, thus preventing depolymerizaton and improving reaction time and efficiency without the use of a separate additive.
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Lee Jae-Suk
Rahman Shahinur
Yoo Hee-Soo
Gwangju Institute of Science and Technology
Harness & Dickey & Pierce P.L.C.
Leonard Michael
Zemel Irina S
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