Paper coating with brush

In practice, the catal5Tic layers are prepared by brushing or spraying catalyst ink (a suspension of the catalyst particles in water and/or an organic solvent with addition of ionomer) either onto diffusion media (carbon paper or carbon cloth, also referred to as substrates), resulting in so-called catalyst-coated substrates (CCS), or directly onto... 

Test Panel Preparation. Grit-blasted, steel Q-panels, 3 x 5 in were stored in protective paper inside a desiccator. Just prior to use they were rinsed with a 1/1 (by volume) mixture of mineral spirits and methyl ethyl ketone, allowed to dry, then rinsed with methyl ethyl ketone. Coatings were applied with a brush and thinned to uniform thickness with a number 24 helically wound (Meyer) rod. 

The primer, defined in the first part of this paper as a cut-back of the same or a compatible, unfilled, oxidized asphalt dissolved in a high flash petroleum fraction, should be scrubbed into the concrete surface with a broom or stiff brush (roller or spray application is not recommended) and allowed to dry to permit the solvent to evaporate. This usually takes about 3 to 4 hours, at which time the odor of the solvent will have become faint. This leaves a black deposit of the asphalt in the pores and on the surface of the concrete. If the black color fades away, or becomes gray, the concrete is porous, and another coat of primer is necessary. Repeat until the surface remains black. 

Uses For medical applies, (catheter tubes, closures, IV flow regulators, thermoformed medical pkg.) meter covers brush blocks clarity applies. in food-contact coatings in paper/paperboard in contact with aq./fatty foods... 

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