VARNISH COMPOSITION FOR PREPARATION OF ROAD-MARKING PAINTS Russian patent published in 2014 - IPC C09D5/00 C09D4/00 

FIELD: chemistry.

SUBSTANCE: invention relates to paint and coatings industry, in particular to varnish compositions based on cationic oligostyrol (COS), used in preparation of fast-drying road-marking paints. Dry residue of varnish composition includes disperser, plasticizer and COS, obtained by styrol oligomerisation in aprotic organic solvent (AOS) at temperature 14-55°C and initial concentration of styrol in charge 14-50 wt % in presence of complex of Friedel-Crafts acid (FCA) with promoting additive (PA) with molar ratio FCA:PA=5.3÷14.3:1, with further FCA deactivation with Lewis base and separation of target product by AOS distillation. In varnish composition used is COS, obtained with application as FCA water-free aluminium chloride, and mixture, consisting of, wt %:17.7÷33.5 of α-phenylethanol, 19.0÷60.4 of propylene oxide, 10.7÷40.4 of thiophene and 6.2÷18.5 of water.

EFFECT: reduction of cost of vanish compositions due to reduction of price and volumes of dosing of plasticisers and dispersers in them and reduction of temperature of preparation of vanish compositions.

2 cl, 2 tbl, 5 ex