Durable magnesium oxychloride cement and process therefor
AssigneePromat Research and Technology Centre NV
InventorsXiao Wu, Octavian Anton, Ann Opsommer
Life of this patent
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Abstract
A magnesium oxychloride cement (MOC) composition comprising: caustic calcined magnesia magnesium chloride phosphoric acids or corresponding salts exfoliated vermiculite.
Claims22
A magnesium oxychloride cement (MOC) composition comprising:
- reactive MgO 7-50% by weight
- magnesium chloride 3-20% by weight,
- H2O 9-50% by weight,
- phosphoric acids or corresponding salts 0.05-5% by weight calculated as P2O5, and
- exfoliated vermiculite 1-80% by weight.
A process of making a magnesium oxychloride cement (MOC) comprising the step of mixing reactive MgO 7-50% by weight, MgCl2 3-20% by weight, H2O 9-50% by weight, phosphoric acid or a corresponding salt 0.05-5% by weight calculated as P2O5, exfoliated vermiculite 1-80% by weight and optionally calcite 0.1 to 20% by weight.
A process of making a MOC matrix with reduced HCl release in case of fire comprising the step of adding a calcite (CaCO3) as an additive into the MOC matrix, wherein the MOC matrix comprises reactive MgO 7-50% by weight, magnesium chloride 3-20% by weight, H2O 9-50% by weight, phosphoric acids or corresponding salts 0.05-5% by weight calculated as P2O5, and exfoliated vermiculite 1-80% by weight.
Dependencies are inferred from the claim text.