C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 24/16 (2006.01) C04B 28/10 (2006.01) C04B 28/14 (2006.01)
Patent
CA 2423685
The invention concerns a gypsum plaster composition comprising in combination with plaster and water a surfactant composition, including alkylsulphates of formula H (CH2)nOSO3-M+, wherein: n is from 6 to 16 and the average number of carbon atoms in the alkylsulphate composition nm ranges between 10 and 11, and M is a monovalent cation. The invention also concerns a method for preparing the plaster composition and a gypsum plaster board obtainable from said composition. The invention further concerns a method for making gypsum plaster boards. The invention is useful for producing lightened gypsum plaster boards.
L'invention a pour objet une composition de plâtre comprenant en association avec du plâtre et de l'eau une composition de tensioactifs, comprenant des alkylsulfates de formule H (CH¿2?)¿n?OSO¿3??-¿M?+¿, dans laquelle n est de 6 à 16 et le nombre moyen d'atomes de carbone dans la composition d'alkylsulfates n¿m? est compris entre 10 et 11, et M est un cation monovalent. L'invention a aussi pour objet un procédé de préparation de la composition de plâtre ainsi qu'une plaque de plâtre susceptible d'être obtenue à partir de cette composition. L'invention a enfin pour objet un procédé de fabrication de plaques de plâtre. Application à la fabrication de plaques de plâtre allégées.
Garcin Robert
Martin Daniel
Sabio Serge
Lafarge Platres
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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