Yarish O. Formation of colored protective-decorative coverings of photochemical curing on wood and wood materials

In this thesis creation of coloured protective-decorative coatings on the wood and wood materials has been investigated. The main goal was developing of operating practices and technological process of creation of transparent coloured polyester coatings of photochemical curing on the wood and wood materials. Methods of the head conduction equations and elastic materials deformation; traditional methods of varnish flow characteristics measurements; physical-mechanical and decorative parameters of coatings investigations, UV-, visual and IR-spectroscopy, photoelectrical method of sedimentation stability of dispersive media analysis are applied. Rational values of controlling operating practices are established on the basis of investigation of the thermal tensions math model; necessity to fit spectral characteristic of the components of varnish composition and sources of UV-radiation to reach high technological parameters is proved; protective-decorative characteristics are improvement by consequent irradiation by the high pressure irradiator and irradiator with metal-halide lamps; optimal parameters of technological process are established by the calculation of optimization models of the coating creation processes. The main practically valuable results are: improvement of protective-decorative coating properties by adding of 1.5-2.5 % coloured additives; coatings colour spectrum enlargement by mixing of differently coloured high dispersed silica; developing of the method of coating colour prediction; creation of the device for photoelectrical monitoring of dispersion medium sedimentation; coating's physical-mechanical properties improvement and colour range widening by the using of modified energy-efficient equipment for UV-curing appointed by metal-halide lamps and reflectors with dichroic surface. The technological process developed in this thesis is tested in the conditions of manufacturing and recommended to application for woodworking enterprise