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Study on Polymerization Condition of Water-based Acrylic Adhesion  

Lee, Haeng Ja (Department of Chemical Engineering, Dong-A University)
Jang, Suk Hee (Department of Chemical Engineering, Dong-A University)
Chang, Sang Mok (Department of Chemical Engineering, Dong-A University)
Kim, Jong Min (Department of Chemical Engineering, Dong-A University)
Publication Information
Korean Chemical Engineering Research / v.48, no.5, 2010 , pp. 609-614 More about this Journal
Abstract
In this study, emulsion polymerizations for synthesizing acrylic pressure-sensitive adhesive(PSA) were carried out using 2-ethylhexyl acrylate(2-EHA), n-butyl acrylate(n-BA), methyl metacrylate(MMA) as fundamental monomers and acrylic acid(AAc) as a functional monomer in the presence of anionic SLS (sodium lauryl sulfate). To obtain the optimized synthetic condition in the polymerization, we analyzed the polymerization variables such as the effect of surfactant concentration and hydrophilic lipophilic values(HLB). At the same time, the final adhesive properties were also analyzed by the function of the initiator concentration and buffer concentration. In the results, the most stable emulsion was obtained at the surfactant concentrations between 3 and 5 wt%. It was also determined the effect of HLB value of nonionic surfactant and the initiator concentrations on the gel content. Stable emulsion is obtained using the surfactant having HLB value of 12.3. The rate of emulsion polymerization was increased at the initiator concentration greater than 1 wt%, but the stability of the emulsion was decreased. Finally, the effect of the buffer concentrations on the pH and the conversion of the acrylic emulsion product were experimentally measured. At the sodium bicarbonate concentration above 0.4 wt%, the buffer infulence was apparent. The buffer effect was fully acceptable at the concentrations between 0.6 and 0.8 wt% regardless of the monomer composition.
Keywords
Emulsion Polymerization; Water Borne; Acrylic Pressure Sensitive Adhesive;
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Times Cited By KSCI : 2  (Citation Analysis)
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