C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
253/122, 400/201
C08G 18/48 (2006.01) C10M 107/44 (2006.01)
Patent
CA 1177988
12319 HIGH VISCOSITY POLYOXYALKYLENE GLYCOL BLOCK COPOLYMERS AND METHOD OF MAKING THE SAME ABSTRACT OF THE DISCLOSURE A high molecular weight, high viscosity liquid, water soluble polyoxyalkylene block copolymer suitable as a functional fluid is provided having the formula Image wherein Q is the organic residue from an organic diisocyanate; x is an integer in the range of about 1 to 10; R1 and R2 are hydrogen, methyl, ethyl, or mixtures thereof with the proviso that the overall content of species wherein R1 and R2 are hydrogen must be at least 50 percent by weight; R3 and R4 are organic residues resulting from the removal of terminal hydrogen atoms from difunctional polyols; y and z are integers representing the polyether blocks in said copolymer and the sum of which must be from about 1.05 to 2.0 times the value of x; and n, m, r, and s are integers wherein n=m and r=s and the sums n + m and r + s are each in the range of 8 to 250. S P E C I F I C A T I O N 1.
366615
Hopley William G.
Union Carbide Corporation
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