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BYK-321 |
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Solution of a polyether modified methylalkylpolysiloxane |
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Silicone levelling additive with defoaming action. It improves the surface properties of solvent-based coatings, with particular emphasis upon levelling. Causing only a slight surface tension reduction, in contrast to most silicone additives it does not stabilize foam and can even impart defoaming action. BYK-321 is suitable for both solvent-based and aqueous systems. It increases surface slip and thus improves scratch and mar resistance. Formation of BeArd cells is prevented and orientation of flatting agents is improved. BYK-321 is based on the same active substance as BYK-320 but cut in a different solvent. It is only available in the North American market. |
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Non-volatile matter : 51 % |
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