Coating processes – Applying superposed diverse coating or coating a coated base – Settable inorganic coating
Patent
1992-04-16
1994-08-23
Green, Anthony
Coating processes
Applying superposed diverse coating or coating a coated base
Settable inorganic coating
106 1505, 106 1811, 106 1812, 106735, 106778, 106785, 427427, 4273722, 4273977, B05D 102, B05D 714, C09D 106, C09D 518
Patent
active
053406125
ABSTRACT:
Sprayable fireproofing compositions for structural members such as steel columns are provided, as well as a method of applying multiple coatings thereof. The compositions comprise a Portland cement-based material, stucco, and an accelerator. The compositions eliminate the long setting times typical of Portland cement-based materials, and improve the hangability thereof. The product is produced by dry blending a mixture of Portland cement, stucco (calcium sulfate hemi-hydrate) and optionally, a stucco set retarder and shredded polystyrene aggregate. Upon the addition of water, sprayable slurries are formed which can be pumped to the point of application. An accelerator is added in close proximity to the point of injection. Other additives may also be included, such as starch, adhesives and cement strength enhancers. The slurries adhere to the structural member in the slurried state and after setting to provide excellent fire and heat protection. Because of the relative quick setting time of the slurry upon spray application, multiple coatings can be applied within the same working day.
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European Search Report, Application No. EP 93 30 2940, 15 Nov. 1993 (2 pages).
Baker William L.
Green Anthony
Lemack Kevin S.
W.R. Grace & Co.-Conn.
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