Organic-inorganic hybrid polymer latex for high durable traffic marking paint

A process for obtaining the hybrid polymer latex comprising steps of:

• preparing an initial monomer mix pre-emulsion (Biphasic System A) in demineralized water of unsaturated organic compounds that contain the COOH group, and with surface-tension reducing agents comprising detergents, emulsifiers, and/or wetting agents,
• preparing an initial inorganic dispersion feed (Biphasic System B) by mixing a chemically or thermally modified inorganic component comprising at least 50% of an inorganic fraction, the inorganic fraction comprising a nanoparticulate dispersion of an oxide of an element having 4 electrons in its outer orbital in demineralized water,
• preparing an initiator solution (Solution C) for polymerization by mixing a compound in demineralized water wherein said compound through thermal generation of free radicals initiates the polymerization of the initial pre-emulsion,
• adding Solution C simultaneously with Biphasic System A and Biphasic System B at 82 degrees Celsius to a pre-formed acrylic polymer latex used as external seed comprising at least 33% solids of particle size maximum 60 nm (Seed Latex D) to form Polymer latex E,
• holding temperature at 82-86 degrees Celsius for at least 30 minutes,
• cooling the Polymer latex E to 70 degrees Celsius followed by addition of a chaser catalyst system comprising a solution of Tertiary butyl hydroperoxide simultaneously with a Sodium metabisulphite solution thereby reacting traces of monomer, and
• cooling the Polymer latex E to 45 degrees Celsius followed by neutralization with ammonia to a pH ranging from 9.5 to 10.5 and adding at least 2 parts per 100 parts polymer by weight of polyfunctional amines comprising polyethyleneamine, polymerization products of aziridine or polyethyleneamine, or a combination thereof as post-additives to result in final hybrid polymer latex (Polymer latex F).