Wet accelerator, a method of preparing a wet accelerator and a method of producing a gypsum product
AssigneeSaint-Gobain Placo
InventorsBenoit Montigny, Christine Nguyen, Charlotte Catteau
Life of this patent
Estimating the term…
Abstract
According to the present invention, there is provided a wet accelerator for use in the manufacture of a gypsum product, said wet accelerator comprising water, particles of calcium sulphate dihydrate and a stabiliser. Additionally, a method of preparing a wet accelerator and a method of producing a gypsum product are described.
Claims21
A wet accelerator for use in the manufacture of a gypsum product, said wet accelerator comprising
- water,
- particles of calcium sulphate dihydrate (CaSO4·2H2O) wherein at least 50% of the particles of calcium sulphate dihydrate have a diameter of less than 5 μm,
- and a stabiliser,
- wherein said stabiliser comprises a soluble polymer of the formula;
- wherein said stabiliser has an average molecular weight of between 500 and 10,000 g/mol inclusive;
- wherein R1 is selected from the group consisting of H and a cation;
- and
- wherein m is any positive integer.
A wet accelerator for use in the manufacture of a gypsum product, said wet accelerator comprising
- water,
- particles of calcium sulphate dihydrate (CaSO4·2H2O) wherein at least 50% of the particles of calcium sulphate dihydrate have a diameter of less than 5 μm, and a stabiliser,
- wherein said stabiliser comprises a soluble polymer of the formula;
- wherein R1 is selected from the group consisting of H and a cation;
- wherein m is any positive integer;
- and
- wherein particles of calcium sulphate dihydrate form at least 10 wt. % and at most 50 wt. % of the wet accelerator.
A wet accelerator for use in the manufacture of a gypsum product, said wet accelerator comprising
- water,
- particles of calcium sulphate dihydrate (CaSO4·2H2O), wherein at least 60% of the particles of calcium sulphate dihydrate have a diameter of less than 5 μm
- and a stabiliser,
- wherein said stabiliser comprises a soluble polymer of the formula;
- wherein R1 is selected from the group consisting of H and a cation;
- and
- wherein m is any positive integer.
A wet accelerator for use in the manufacture of a gypsum product, said wet accelerator comprising
- water,
- particles of calcium sulphate dihydrate (CaSO4·2H2O) wherein at least 50% of the particles of calcium sulphate dihydrate have a diameter of less than 5 μm,
- and a stabiliser,
- wherein said stabiliser comprises a soluble polymer of the formula;
- wherein R1 is selected from the group consisting of H and a cation;
- wherein m is any positive integer;
- and
- wherein said particles of calcium sulphate dihydrate have a surface area of between 5 and 30 m2/g.
Dependencies are inferred from the claim text.