Aqueous polyurea dispersions with improved hardness and solvent

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524589, 524590, 524839, 524840, 524539, 4284231, C08J 300, C08K 320, C08L 7500, B32B 2700

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active

055697062

ABSTRACT:
The present invention relates to aqueous polyurea dispersions wherein the polyureas contain 0.1 to 25% by weight, based on the weight of the polyureas, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups.
The present invention also relates to a process for preparing these aqueous polyurea dispersions and to their use for preparing coatings.

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