C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
C08B 31/00 (2006.01) C04B 28/14 (2006.01) C08L 3/02 (2006.01)
Patent
CA 2741417
Gypsum based formulations The formulation for making plasterboard with paper cover sheets comprises finely divided gypsum, a minor amount by weight of starch and, as crosslinking agent for the starch, a tri-functional reactive s-triazine having substituents at positions 2, 4 and 6 of the triazine ring which are reactive with the starch. A preferred crosslinking agent is 2,4,6-trichloro-s-triazine, which is preferably partially reacted with the starch before further reaction with the paper cover sheets for the plaster board..
La présente invention concerne des formules à base de gypse. La formule servant à la fabrication de plaques de plâtre recouvertes de feuilles de papier est constituée de gypse finement divisé, d'une quantité en masse minimale d'amidon et, au titre d'agent de réticulation de l'amidon, d'une s-triazine réactive trifonctionnelle portant des substituants aux positions 2, 4 et 6 du cycle triazine réactifs vis-à-vis de l'amidon. L'un des agents de réticulation préférés est la 2,4,6-trichloros-triazine, ayant préférentiellement partiellement réagi avec l'amidon avant réaction ultérieure avec les feuilles de papier recouvrant la plaque de plâtre.
Chotard Thierry
Dupas Cyrielle Sandrine
Smith Agnes
Wilkes Ian
Bpb Limited
Mckay-Carey & Company
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