FIELD: chemistry.
SUBSTANCE: layer contains transparent solid particles which contain at least three different grain size fractions and which have Mohs hardness of at least 4, which are embedded in a synthetic resin matrix, where the grain size fractions in each case have monomodal grain size distribution, and the transparent solid particles are present as a trimodal grain size distribution comprising a coarse fraction, a medium fraction and a fine fraction.
EFFECT: invention enables to optimise wear and scratch resistance, brushing surface protective layers with each other without increasing the viscosity of the used resin and without losing transparency of the desired layer.
12 cl, 3 tbl, 8 ex
