Coating processes – With pretreatment of the base
Patent
1980-01-14
1981-09-29
Lusignan, Michael R.
Coating processes
With pretreatment of the base
252477R, 427356, 427401, 427403, 427428, 427379, B05D 300, B05D 128, B05D 312, B01J 3500
Patent
active
042923484
ABSTRACT:
An insulating system and the method for the preparation thereof, for preparing a catalyst substrate or catalyst to provide a final product wherein a packing and catalyst are insulated from each other. A thin coat of low viscosity ceramic inorganic fiber formulaton is applied to a clean dry substrate or catalyst to wet the surface thereof to facilitate adhesion. Then at least one coat of high viscosity inorganic fiber formulation including a quantity of hollow silica microspheres is applied to the thin coat to provide an insulating coating of desired thickness (e.g. 45 mils .+-. 15 mils). Then the insulating coating is dried. The high viscosity ceramic inorganic fiber formulation is preferably produced from the low viscosity ceramic inorganic fiber formulation by the addition of the hollow silica microspheres thereto, providing very precise viscosity control. The final substrate or catalyst coating system produced has a thermal conductivity of about 2.7 BTU in h.sup.-1 ft..sup.-2 F.sup.-1, or less, at about 1500.degree. F.
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Technical Bulletin 14-2-2 by Emerson & Cuming, Inc; Apr. 1978.
Create New Products, Improved Present Products with Eccospheres Glass & Ceramic Microballons, Emerson & Cuming, Inc.
Johnson Matthey Inc.
Lusignan Michael R.
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