Akrilik emulsiyon polimerlerinin sentezi ve boya formülasyonunda kullanımı

Formed on the metal surface from corrosion due to the atmospheric conditions, causes the loss of the mechanical properties of the metal, reduce the lifespan and seriously affect the country's economy. For these reasons, metals have to be protected against atmospheric conditions. One of the precaution methods is isolated metals from water and air with a coating material. Solvent-based system is the leader of the metal coatings, but recently solvent-based product usage limitations and volatile organic compounds (VOC) regulations make popular water based coating for protection of metal. For that matter, solvent based products usage, which have negative effect on human health and environment because of toxic and flammable material inside can be reduced with water-based products. With the project, emulsion polymers performance which has ketonic resin as a co-binder will be tested on water based metal paint to evaluated corrosion and adhesion properties. Ketonic resins can be added to the emulsion polymer to prolong coating life because it increases adhesion and corrosion performance. Ketonic resins are the family of thermoplastic resins and have low moleculer weight. They work as an adhesion promoter when combine with co-polymers. Cyclehexanone formaldehyde resin is used in this thesis because of high amount –OH functional group in its backbone. It gives better compability with water borne systems. Choosing right polymer is one of the important criteria for corrosion protection. Emulsion polymerization system is can be used in the metal corrosion. 2-Ethylhexyl acrylate and methyl methacrylate can be choosen for polymerization due to their hard monomer properties. Cyclehexanone formaldehyde resin is obtained solid state and it dissolved in proper solvent. This emulsion is added on pure acrylic polymer which, obtained from water based emulsion polymerization method, as 5% rate and tried to getting homogeneous blend under high-speed mixture. Acrylic polymer – ketonic resin blend is used for water-based metal coating formulation. Water based metal paint is applied on 4 different metal types such as aluminum, galvanized, stainless steel and cold rolled steel for checking adhesion and corrosion performances. The aim of the study is evaluating ketonic resin adhesion and corrosion performance on metal formulation with comparing ketonic resin-acrylic polymer combination and pure acrylic polymer emulsion without ketonic resin. For this study, 3 different paint is prepared one is has only pure acrylic polymer as a binder, second one is acrylic polymer – ketonic resin blend and last one is commercial product of ketonic resin is blended with acrylic polymer as a binder and cheching performance between 3 of them. According to adhesion and corrosion performances show that ketonic resin is enhance adhesion on some metal types: adhesion affects corrosion performance in long term. During the synthesis part, when added ketonic resin on the system, some stability problem is observed. Although added some surfactant into the system for preventing agglomeration, is not clear off the problem. Preventing the system against to stability problem, resin will be connected with acrylic polymer as chemical bond during the polymerization stage and than they are tested on paint formulation is planned for next study. In this way, foreseeing that ketonic resin will be integrated the acrylic emulsion polymer and getting better adhesion and corrosion performances.