As a result, there is hardly any change in the glass transition temperature in the cured paint film. No covalent linkage exists between the core and the shell the shell is simply physically anchored to the core.
The center is a silicone rubber core that promotes the tough, resilient characteristics, encased by a shell. 3 The special feature is the two-phase nature of the core-shell particle. This article describes the use of ALBIDUR ® core-shell silicone elastomer technology in a two-pack epoxy resin system and its influence on the mechanical properties of the coating generated.ĪLBIDUR technology involves the use of a patented process to permanently incorporate in-situ small silicone elastomer particles in a resin carrier (Figure 1). Using silicone core-shell rubber technology, it is possible to combine these originally contradictory properties. to generate tough, resilient but hard coatings. It is desirable to incorporate some ductile segments in the highly crosslinked, brittle matrix without impairing the network or mechanical properties, i.e. In this type of in-situ generation of particles, however, it is extremely difficult to control the particle size without fundamentally altering the properties of the polymer matrix. Combination with a second microphase, such as dispersed rubber or thermoplastics, can lead to significantly improved toughness. This weakens the network density of the system as well as the surface hardness and chemical resistance. Incorporating flexible constituents in a highly crosslinked binder matrix results in markedly improved impact strength but a lower degree of crosslinking.