Research of influence of technical characteristics of dioxide of the titan on the whiteness of enamels for the horizontal marking of highways
The major eco-friendly inorganic pigment used in paint and varnish industry is dioxide of the titan. Authors investigated various brands of dioxide of the titan (chloride and sulphatic) for the purpose of definition of possibility of their use as pigments for production of white enamels for a horizontal marking of highways. On the basis of various brands of dioxide of the titan on a laboratory dissolver paint for road marking with use as film-forming copolymer of methylmethacrylate and n-butilakrilate were made. As a result of the conducted researches it is defined that sulphatic brands of dioxide of the titan of rutilny version, irrespective of a mode of a surface treatment, don't allow to receive a paint and varnish covering of the demanded whiteness. To a standard indicator there correspond the enamels made with use of dioxide of the titan of a rutilny form received by a chloride mode with a surface treatment joints of aluminum and zirconium. Distinctive feature of the paint for road marking covering received on the basis of enamel with a whiteness of 88% is low water absorption and high physicomechanical rates. Thus, only chloride brands of dioxide of the titan with an indicator of a whiteness of 97,6-97,7% and an index of yellowness of 0,5-0,7% can be used for production the paint for road marking of the enamels conforming to requirements of standard documentation of Republic of Belarus. Preliminary laboratory researches of the raw materials applied to production of enamels are the most important development stage of compoundings of modern paints and varnishes.