Abstract: The present invention relates to tie-coat compositions for fouling-release paint systems. The invention provides a method of coating a substrate with a coating composition comprising at least two types of functional polysiloxane compounds selected from epoxy-functional polysiloxanes, amino-functional polysiloxanes, and particular adhesion promoting agents of the polysiloxane type. The present invention also provides a substrate coated with such a composition and a composition particularly useful for said method. The binder phase may also comprise constituents of epoxy paint compositions, e.g. epoxy resins and amine curing agents. The compositions are particularly relevant in combination with diorganopolysiloxane-based fouling-release coatings and anticorrosive epoxy primer coatings.

Abstract: In a compact combined spray drying and after-treatment apparatus having internal gas filters and an internal fluidized bed in the drying chamber and a fluidized bed in the after-treatment zone, pipe means are used for conducting a stream of particle-loaded gas formed in the after-treatment zone to suitable locations in the drying chamber without disturbing the normal operation of the drying chamber and the fluidized bed therein.

Abstract: In a spray drying process utilizing a spray dryer having internal gas filters and an internal fluidized bed and comprising an after-treatment of the product in a separate unit outside the spray drying chamber, which treatment produces a particle-loaded gas stream, said particle-loaded gas stream is conducted from the separate unit to the spray drying chamber. The stream passes, together with the spent drying gas in the drying chamber, the filters integrated in said chamber. Several plant modifications are suggested for performing the process which involves substantial savings by making external particle collectors superfluous.