The Study of New Phenols Curing Agent Used in Epoxy Powder Coating

Abstract: Contraposing the technic problem of the ZY-1 phenols curing agent used in pipeline corrosion control and electronic enclosed material, which included poor water resistance and coating brittleness, this study impolders a new phenols curing agent to improve the counter bending and water resistance performance by means of active group modification, which based on the preparing theory discussed and analyzed in detail. Fristly , as counter bending and water resistance as standards , the modified agent and preparing technics were ensured by contrast and filtration . then the proportion of powder coating , process conditions and reaction kinetics parameters were ascertained by differential scanning calorimetry (DSC) . The research showed the following results:(1) The counter bending and water resistance performance of coat were greatly improved when used adipic acid as modified agent to synthesize new phenols curing agent. The problem which the primary curing agent was poor coating brittleness and water resistance was resolved also .(2) The preparing technics conditions : the firstly reaction time was 2 hours at 120℃ ; the secondly reaction time was 1.5 hours at 160℃ ; the mol ratio of adipic acid and epoxy resin was 1:2 .(3) The ideal reaction conditions of solidify system was : beginning reaction at 94.2℃ , keeping constant temperature at 117.5℃ until complete reaction . The apparent activation energy of solidify system was 52.69 KJ/mol ; the order of reaction was 0.882 , which indicated solidify reaction was complex reaction .(4) The product was send to DaiLian YuHua powder coating company for significance testing , the result indicated : this curing agent has a excellentsolidify effect and is superior to U.S.A.3082 curing agent ; The powder coating is good in adhesive force and pliability , the coat surface is lightness and not holey . so the product is setting the pace in the home …
Key words: curing agent ; epoxy resin ; powder coating ; differential scanning calorimetry ; significance testing

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