| abstract |
A composition useful in treating cellulosic materials to make them durably water repellent which comprises an aqueous emulsion of a soap, a surface active agent, water and a polyaryl polyisocyanate containing at least three aryl groups and an average of at least three isocyanate groups, a portion of which isocyanate groups may be modified by reaction with an alcohol, thioalcohol, organic acid, amine or amide. This composition is applied to the cellulosic material and is, thereafter, cured with water. |