Preparing polyurea elastomer containing roll coating agent, useful e.g. to treat paper, comprises reacting diamine- and diisocyanate-compound to give prepolymer, mixing prepolymer with two different diamine compounds and applying on roll

摘要

Preparation of at least a polyurea elastomer containing roll coating agent, comprises (a) preparing a prepolymer by reacting at least an alpha ,omega -diamine compound with at least an aliphatic or cycloaliphatic diisocyanate compound; (b) mixing the prepolymer with at least two different alpha ,omega -diamine compounds and (c) applying the obtained mixture on a rotating roll, where the compounds used in the step (b) are selected in such a way that the pot time of the step (b) is 5-60 seconds. An independent claim is included for roll coating agent obtained by the above process.