Dissertation > Excellent graduate degree dissertation topics show

Study of UV-heat Dual Curing Waterborne Coatings

Author: ZengFanChu
Tutor: LiangLiang
School: Guangdong University of Technology
Course: Applied Chemistry
Keywords: water-based acrylate polymerization cross-linking UV curing dual curing
CLC: TQ637
Type: Master's thesis
Year: 2011
Downloads: 77
Quote: 0
Read: Download Dissertation

Abstract


Water-based acrylic coating is the most widely used Species in water-based paint field. The waterborne acrylic coating has many excellent properties,such as anticorrosion,alkali-resistance,weather-resistance,good film-forming,good color retention,no pollution,safety and so on.However, the water-based acrylic paint also has some shortcomings, such as water permeability, high water absorption, thermal sticky cold crisp. UV-curing is an energy saving and effective modified method. UV-curing coatings has many excellent properties.UV-curable waterborne acrylate coatings is achieved by introducing a vinyl double bond or an acrylate double bond into waterborne acrylate resin. So it has the advantage of both UV-curing coatings and waterborne acrylate coatings. In this paper, a kind of heat-UV dual curing waterborne acrylate emulsion is prepared.Using the thermal energy of heating section, not only thermal can the crosslinking reaction be achieved, but water can be removed from coating and realize the effect of the leveling coating.On this basis, with UV-light and photoinitator, further rapid crosslinking can be achieved and excellent properties of the coating material can be obtained. Emulsion polymerization process, preparation of dual curing coatings and optimization of film-forming are the focuses of this paper.The main results are as follows:(1) Acrylic emulsion with the acetyl group had been prepared by use of methyl methacrylate, methyl acrylate, ethyl acetoacetate methyl methacrylate and acrylic acid. The influence of the polymerization temperature,the amount of initiator, the amount of emulsifier and the time of dip on emulsion polymerization were discussed. The impact of the ratio of the hard and soft monomer and glass transition temperature on the properties of latex film and the effect of the functional monomer content on the stability of emulsion were also discussed.the optimum synthesis conditions of emulsion was achieved by experiment. And the emulsion with good stability(>six months), good performance was obtained. (2) A certain amount of multi-functional monomer was added into acrylic emulsion. Then the acetoacetate group and the C=C double bonds could be reacted by Michael addition reaction at alkaline and heat conditions,and the factor of UV curing cross-linking was introduced into the structure of the polyacrylic. The heat-UV dual-curing acrylic emulsion was prepared by adding an appropriate amount of photoinitiator.(3) The influence of the heat-radiation curing process、the functional monomer content and the design of glass transition temperature of emulsion on the film properties were studied.The impact of the functional monomer content on the stability of dual curing emulsion was discussed. Meanwhile, in order to identify the equilibrium point of thermal curing and UV curing, the ratio of the polyacrylic emulsion and the multifunctional acrylate was studied. The best overall performance of waterborne dual curing coating was achieved. The results show that the cross-linking film has excellent properties:the hardness 3H, alkali-resistance 24 hours,adhesion 0 grade,ethanol-resistant wipe 158 times.

Related Dissertations

  1. Synthesis and Characterization of High-performance Polyacrylonitrile,O631.3
  2. Polymerization of GMA by ATRP and Stereoregularity of PGMA,O631.3
  3. Synthesis and Performance Study of Bisphenol AP-based Polybenzoxazines,TQ320.1
  4. The Study on the Creep Resistance Property of Ultra-High Molecular Weight Polyethylene Fiber,TQ342.61
  5. Preparation and Characteration of Composite Microspheres with Dual-, Triple- Responsive Properties,O631.3
  6. Preparation and Property Study of Polyaniline/Polyester Composite Conductive Fabric,TS195.6
  7. Studies on the Preparation of 20% Chlorpyrifos CS and Its Analytic Methods,S482.3
  8. Research on Detection of the Carbamate Pesticides by Aminoacids-matal Ions Films Chemically Modified Sencor,S481.8
  9. For drug ingredients isolated molecularly imprinted polymer microspheres preparation , properties and application of testing,O631.3
  10. Acrylic acid - acrylamide superabsorbent properties of high-powered,TQ324.8
  11. Structure and Characterization of Room Temperature Self-crosslinked Acrylonitrile-butadiene-styrene,TQ325.2
  12. Biodegradable Polymeric Drug Nano Carriers for Targeted Combinational Therapy of Cancers,R730.5
  13. Design, synthesis and characterization of the star polymer,O631.3
  14. Synthesis and properties of self-cross -linked acrylic resin,TQ325
  15. Surface Treatment of Polyacrylonitrile Based High Modulus Carbon Fibers,TB304
  16. Jeans impact crushed resin finishing effect factor analysis,TS195.55
  17. Preparation and Performance of Meloxicam Loaded PLA Sustained-release Microspheres,R943
  18. Superabsorbent salt tolerance studies,TQ324.8
  19. BC / PVA composite gel film preparation and properties of,TB383.2
  20. bFGF chitosan microspheres and promote Schwann cell proliferation studies,R651.2
  21. The Characterization and Polymerization Shrinkage Properties of Dental Composite Resins with Fluorphlogopite/Fluorapatite Fillers,R783

CLC: > Industrial Technology > Chemical Industry > Paint Industry > Special paints
© 2012 www.DissertationTopic.Net  Mobile