Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1983-11-22
1984-11-06
Helfin, Bernard
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
560115, 560158, 252 515A, 252 67, 252 79, C07C125077, C07C125073
Patent
active
044813678
ABSTRACT:
A high molecular weight, high viscosity liquid, water soluble polyoxyalkylene block copolymer suitable as a functional fluid is provided having the formula ##STR1## wherein Q is the organic residue from an organic diisocyanate; x is an integer in the range of about 1 to 10; R.sup.1 and R.sup.2 are hydrogen, methyl, ethyl, or mixtures thereof with the proviso that the overall content of species wherein R.sup.1 and R.sup.2 are hydrogen must be at least 50 percent by weight; R.sup.3 and R.sup.4 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.
REFERENCES:
patent: 2946767 (1960-07-01), Gassmann
patent: 2948691 (1960-08-01), Windemuth et al.
patent: 3306926 (1967-02-01), Neher et al.
patent: 3786081 (1974-01-01), Oppenlaender et al.
Balmer Norman L.
Helfin Bernard
Union Carbide Corporation
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