Authors Voit, B. ; Schmaljohann, D. ; Abdelrehim, M. ; Sangermano, M. ; Pavlova, E. ; Dusek, K.
Title Hyperbranched Polymers as Multifunctional Crosslinker in Photochemically and Thermally Cured Coatings
Date 13.12.2004
Number 12318
Abstract Hyperbranched polymers (HBP) have as dendritic macromolecules peculiar and often unique properties. Hyperbranched polymers are particularly interesting because they resemble dendrimers, but they can be produced more easily on a larger scale at a reasonable cost. They are characterized by a highly branched backbone, which give access to a large number of reactive groups. Their structure give them excellent flow and processing properties, which have attracted great attention. HBP with acrylate, vinyl ether, allyl ether or epoxy functions were studied as multifunctional crosslinker in coatings and in thermosets, using thermal as well as UV curing methods. We would like to report on the use of aromatic-aliphatic hyperbranched polyesters in UV curable coatings as well as vinylether functionalized crosslinkers6 as also as multifunctional transfer agents (phenolic end functions). The OH functionalized polyesters and hyperbranched polyols based on a poly(urea urethane) structures were also applied in thermally cured urethane coatings. The examples show the high versatility of HBPs in coating application. (Substrates: silicon, glass, aluminum.)
Publisher Polymeric Materials: Science and Engineering
Citation Polymeric Materials: Science and Engineering 91 (2004) S.260-261
Tags aluminum substrates organic coatings dendrimers polyvinyl resins curing agents polyurethane resins crosslinking

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