C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 11/00 (2006.01)
Patent
CA 2602027
A wet gypsum accelerator comprising ground product having a median particle size of from about 0.5 micron to about 2 microns and calcium sulfate dihydrate, water, and at least one additive selected from the group consisting of (i) an organic phosphonic compound, (ii) a phosphate-containing compound, or (iii) a mixture of (i) and (ii), is disclosed. Also disclosed are a method of preparing a wet gypsum accelerator, a method of hydrating calcined gypsum to form an interlocking matrix of set gypsum, a set gypsum-containing composition, and a set gypsum-containing product.
La présente invention concerne un accélérateur pour gypse en phase humide comprenant un produit moulu ayant une granulométrie moyenne comprise entre environ 0,5 micron et environ 2 microns et du sulfate de calcium bihydraté, de l~eau et au moins un additif sélectionné parmi le groupe constitué de (i) un composé phosphonique organique, (ii) un composé contenant du phosphate ou (iii) un mélange de (i) et (ii). La présente invention concerne également un procédé de préparation d~accélérateur pour gypse en phase humide, un procédé d~hydratation de plâtre pour former une matrice enchevêtrée de gypse durci, une composition contenant du gypse durci et un produit contenant du gypse durci.
Bolind Michael
Hinshaw Stewart
Price Robert
Song W. David
Streeter Michael M.
Company United States Gypsum
Moffat & Co.
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