UV curing of epoxy functional hybrid silicones |
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| Authors: | Sophie Putzien Eckhart Louis Oskar Nuyken James V. Crivello Fritz E. Kühn |
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| Affiliation: | 1. Molecular Catalysis, Catalysis Research Center, Technische Universit?t München, Lichtenbergstra?e 4, 85747 Garching, Germany;2. Chair of Inorganic Chemistry, Faculty of Chemistry, Technische Universit?t München, Lichtenbergstra?e 4, 85747 Garching, Germany;3. Wacker‐Chair of Macromolecular Chemistry, Faculty of Chemistry, Technische Universit?t München, Lichtenbergstra?e 4, 85747 Garching, Germany;4. Department of Chemistry, New York State Center for Polymer Synthesis, Rensselaer Polytechnic Institute, Troy, New York 12180 |
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| Abstract: | Several epoxy difunctional hybrid alkylene‐silicone telomers with different silicone characters and organic spacers (linkers) were prepared via the platinum‐catalyzed polyhydrosilylation of α,ω‐dihydrosiloxanes and α,ω‐dienes. Thereafter, the resulting Si? H‐terminated prepolymers were terminally functionalized with 4‐vinyl‐1,2‐epoxycyclohexane or allyl glycidyl ether. In the presence of a lipophilic cationic photoinitiator, the terminally epoxy‐functionalized hybrid alkylene–silicone telomers were photopolymerized to give crosslinked, soft, elastomeric, and transparent films. The progress of the photoinitiated cationic ring‐opening epoxide polymerizations was monitored using optical pyrometry. Potential applications for these novel photocurable epoxy‐functional telomers are as modifiers for UV curable coatings, printing inks, adhesives, and release coatings. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 |
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| Keywords: | epoxy functional hybrid alkylene‐silicone telomers hydrosilylation cationic photopolymerization optical pyrometry |
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