Synthesis and characteristics of photoactive-hydrogenated rosin epoxy methacrylate for pressure sensitive adhesives

Authors

  • Hyun-Sung Do,

    1. Planning Manufacturing Engineering 2 Group PDP Business Division, Samsung SDI Co., Ltd., South Korea
    2. Laboratory of Adhesion & Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, South Korea
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  • Jin-Hee Park,

    1. Laboratory of Adhesion & Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, South Korea
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  • Hyun-Joong Kim

    Corresponding author
    1. Laboratory of Adhesion & Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, South Korea
    2. Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, South Korea
    • Laboratory of Adhesion & Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, South Korea
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Abstract

Hydrogenated rosin epoxy methacrylate (HREM), based on hydrogenated rosin and glycidyl methacrylate (GMA), was synthesized for use as an advanced tackifier in the UV-crosslinking pressure sensitive adhesives (PSAs) system. The HREM, as a tackifier, contained UV-curing sites; thus, allowed photopolymerization to occur by UV irradiation. This UV-curable tackifier, HREM, can improve the curing rate and adhesion performance of UV-crosslinking PSAs. The characteristics of HREM were analyzed by GPC and DSC and its synthetic mechanism studied using FTIR and 1H NMR; the characteristic peaks of hydrogenated rosin and GMA vanished, but new peaks for HREM appeared. The PDI and the Tg by DSC were 1 and −25.6°C, respectively. The photopolymerization of HREM was studied using photo-DSC. Heat flow was observed during UV irradiation, and the curing rate and conversion both increased with rising photoinitiator content. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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