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Assignee3M Innovative Properties Company
InventorsMatthew T. Scholz, Steven S. Kantner, Kristen L. Comstock, Christopher J. Brown
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A polyurethane dispersion and method of making are provided. The dispersion is stable in an alcohol-water mixture. The dispersion is a reaction product of: (i) at least one oligomeric polyactive hydrogen compound, wherein said compound is an alkyl, aryl, or aralkyl structure optionally substituted in and/or on the chain by N, O, S and combinations thereof, and wherein the compound is insoluble in 50:50 weight percent of said alcohol-water mixture; (ii) at least one polyisocyanate, and (iii) at least one polyactive hydrogen compound soluble in the alcohol-water mixture selected from the group consisting of a compound containing an ionic group, a compound containing a moiety capable of forming an ionic group, a compound containing a polyester, polyether, or polycarbonate group having a ratio of 5 or less carbon atoms for each oxygen atom, and mixtures thereof; and (b) at least one polyfunctional chain extender.
A polyurethane dispersion, said polyurethane comprising the reaction product of:
A method of making a polyurethane dispersion that is stable in a lower alcohol-water mixture containing at least about twenty percent by weight alcohol, said method comprising the steps of:
Dependencies are inferred from the claim text.