C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/00 (2006.01) B05D 1/02 (2006.01) C04B 11/00 (2006.01) C04B 22/00 (2006.01) C04B 24/04 (2006.01) C04B 28/14 (2006.01) C04B 40/06 (2006.01) C09K 21/02 (2006.01) C09K 21/04 (2006.01) C09K 21/14 (2006.01)
Patent
CA 2361007
Improved sprayable gypsum-based fireproofing composition comprising a lightweight aggregate and a set retarding agent in an amount effective to delay the setting of said composition for at least 24 hours and preferably for at least 72-96 hours without causing the composition to swell or shrink or to cause a salt layer to form on the composition when it is spray-applied. The fireproofing composition can retain fluidity in conventional spray hoses overnight and yet it is capable of being injected with a set accelerator, such as aluminum sulfate, on the next day or on a successive day when spray-applied onto a substrate.
L'invention porte sur une composition ignifuge pulvérisable améliorée à base de plâtre comprenant un agrégat léger et un retardateur de prise en quantité suffisante pour différer la prise de 24 heures au moins et de préférence de 72, 96 heures au moins sans gonflement ni retrait de la composition ou formation d'une couche de sel la recouvrant lors de l'application. Ladite composition peut rester fluide dans son tuyau de projection d'un jour à l'autre mais peut être injectée avec un accélérateur de prise tel que du sulfate d'aluminium le lendemain ou un jour suivant au moment de son application sur le substrat.
Hilton Dennis M.
Kindt Lawrence J.
Perito Richard P.
Smart & Biggar
W.r. Grace & Co.,-Conn.
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