Kollicoat EMM is a soft polymer, which makes the use of a plasticizer unnecessary. The product iss very fexible, extensible .Cores containing substances that are water-sensitive or incompatible with thesustained release coating should be given a subcoating. A coating weight 0.2–2.0 mg/cm2is required, depending on the polymer used. A subcoating of organic solution is recommended or water-sensitive active ingredients.
Kollicoat EMM 30 D is a polymer with relatively high tack. Auxiliary agents arenecessary to reduce the tack and to improve processing when it is processed asa coating.Previously, talc was generally used or this purpose. More recent studies haveshown that the use one microcrystalline cellulose or hydroxypropyl methylcellu-lose can greatly reduce the tack. At the same time, the inlet air temperature andthe spraying rate can be increased, which makes it possible to noticeably accel-erate the coating process. At the same time, these substances have the advan-tage that they can also act as a pore-forming agent and give stable release char-acteristics throughout the storage time.
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