Six Fluorine Butanol Modified Melamine Formaldehyde Resin

In recent years, amino resin has attracted growing interest as coating because ofits multifunctionality and superior performance. However, several disadvantages ofthis resin make its application process inefficient and uneconomical, such as pooradhesion, coating brittle and high hardness. Typically, the amino resin crosslinkingagent is used together with other resin, the resulting coating film is excellent inperformance, such as good gloss, hardness, chemical resistance, water resistance andother properties. Based on the above advantages, amino resin paint has been widelyused in the automotive, steel furniture, metal coatings, construction equipment,household appliances and other fields. Though the melamine formaldehyde resin (MF)has been widely used in many fields, recent studies have demonstrated that thedevelopment of this resin is limited due to their poor stability and poor solubility.Therefore, many domestic and foreign researchers are committed to the modificationof such resins, thereby facilitating get excellent performance and widely used resins.The up-to-date investigation situation and prospect of resin were concludedbased on domestic and foreign literatures. At first, this paper studied the etherificationof melamine formaldehyde resin using n-butyl alcohol in this process, and then putforward six fluorine butanol modified melamine formaldehyde resin. This study isfocused on the stability of the resin and etherification of melamine formaldehyderesin using six fluorine butanol. Experiment was divided into two parts: The first stepis hydroxymethyl reaction in an alkaline environment. We could estimate the degreeof the hydroxymethyl according to the molar ratio, reaction time, pH and temperature.Therefore, the optimum conditions are obtained: molar ratio of melamine andformaldehyde1:8, pH8.5, reaction time1.5h. In that situation, the degree ofhydroxymethyl is highest and laying the foundation for the reaction of theetherification and polycondensation in the next step. In the second step, we also couldanalyze the results of the etherification in the same conditions and determine theoptimum conditions of the etherification as well as the reaction with thepolycondensation in the acidic conditions, and structure is confirmed by IR and NMRspectra F. Considering the etherification degree of viscosity and ether products, the optimum conditions is: melamine: formaldehyde: hexafluorobutanol=1:8:8(molarratio), pH5.5, reaction time10h.Finally, this paper also studies the film-forming process that the six fluorinebutanol、n-butyl alcohol etherified melamine formaldehyde resin as crosslinker withother matrix resin, and as a crosslinking agent, the formulation with matrixresin/alkyd resin, performance testing, etc. were investigated. In addition, we alsotested the coating hardness, flexibility, adhesion, chemical resistance, contact anglethrough a series of characterization methods, so as to determine that six fluorinebutanol etherified melamine formaldehyde used with alkyd resin not only reduce thecuring temperature, but also improve the resin’s adhesion, flexibility, water and oilrepellent effect. Thus，the properties of resins make them more widely applicable inmany industrial fields.