The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 1984
Filed:
Nov. 22, 1983
Robert J Knopf, Saint Albans, WV (US);
Union Carbide Corporation, Danbury, CT (US);
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.