Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From heterocyclic reactant containing as ring atoms oxygen,...
Reexamination Certificate
2006-04-25
2006-04-25
Wood, Elizabeth D. (Department: 1755)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From heterocyclic reactant containing as ring atoms oxygen,...
C528S410000, C528S412000, C528S414000, C528S415000, C528S416000, C568S620000
Reexamination Certificate
active
07034103
ABSTRACT:
The present invention provides process for producing polyols using a crystalline, hydroxide containing double metal cyanide (DMC) catalyst of the formulae (I) or (II),in-line-formulae description="In-line Formulae" end="lead"?M1x[M2(CN)6]yOH.L (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?M1x[M2(CN)6]y.zM1(OH)q.L (II)in-line-formulae description="In-line Formulae" end="tail"?wherein M1represents a metal selected from Zn+2, Fe+2, Ni+2, Mn+2, Co+2, Sn+2, Pb+2, Fe+3, Mo+4, Mo+6, Al+3, V+4, V+5, Sr+2, W+4, W+6, Cu+2and Cr+3, M2represents a metal selected from Fe+2, Fe+3, Co+2, Co+3, Cr+2, Cr+3, Mn+2, Mn+3, Ir+3, Ni+2, Rh+3, Ru+2, V+4and V+5, L represents an organic ligand and x, y and q are chosen to maintain electroneutrality. The polyols of the present invention may find use in the preparation of polyurethanes.
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Bayer Antwerpen N.V.
Gil Joseph C.
Mrozinski, Jr. John E.
Whalen Lyndanne M.
Wood Elizabeth D.
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