Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From organic oxygen-containing reactant
Reexamination Certificate
2004-05-27
2008-09-09
Eyler, Yvonne (Department: 1621)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From organic oxygen-containing reactant
C521S167000
Reexamination Certificate
active
07423112
ABSTRACT:
The present invention relates to novel polyether polyols containing pendant amine group and to a process for their preparation. These polyether polyols have molecular weights of from about 105 to about 35,000, and contain at least one terminal hydroxyl group and at least one pendant amine group. The process for their preparation comprises reacting a compound containing from 1 to 10 hydroxyl groups and a molecular weight of about 32 to about 15,000 with at least one epoxide which contains one or more halogen atoms, in the presence of one or more DMC catalysts, to form an intermediate polyether polyol which contains halogenated carbon atoms; then reacting this intermediate polyether polyol with an amine group containing compound having from 1 to 3 primary, secondary and/or tertiary amine groups.
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Huang et al. {Controlled ring-opening polymerization of propylene oxide catalyzed by double metal-cyanide complex, Journal of Polymer Science, Part A: Polymer Chemistry (2002), 40(8), 1142-1150}.
Huang et al. Controlled ring-opening polymerization of propylene oxide catalyzed by double metal-cyanide complex, Journal of Polymer Science, Part A: Polymer Chemistry (2002), 40(8), 1142-1150.
Bayer MaterialScience LLC
Brown N. Denise
Eyler Yvonne
Nwaonicha Chukwuma O
Whalen Lyndanne M.
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