Aqueous polymer dispersions as binders for non-blocking scratch-resistant and chemical-resistant coatings

摘要

Autocrosslinking aqueous dispersions characterized by an MFT of from 0 DEG to about 50 DEG C. include at least one carbonyl-containing soft latex polymer having an MFT of below about 20 DEG C., at least one hard latex polymer having an MFT of above about 25 DEG C., and at least one polyfunctional carboxylic hydrazide. The aqueous polymer dispersions are used as binders for non-blocking, scratch-resistant and chemical-resistant coatings and as binders for clear coat and pigmented coating systems.