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Calcium sulphate-based products having enhanced water resistance

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BPB Limited, Walton, Richard Ian and Fisher, Robin (2011) Calcium sulphate-based products having enhanced water resistance. WIPO: World Intellectual Property Organization no.WO/2010/133898 [Online]. Available at: http://www.wipo.int/patentscope/search/en/WO201013....

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Official URL: http://www.wipo.int/patentscope/search/en/WO201013...

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Abstract

A water-resistant calcium sulphate based body comprises a matrix of crystalline calcium sulphate anhydrite, crystals of the matrix being connected to one another by water-resistant phosphate bonding zones, optionally also containing aluminium. The body can be produced by impregnating a porous calcium sulphate with a source of phosphate ions (optionally containing aluminium), and then calcining. Alternatively, a paste comprising calcium sulphate and a source of phosphate ions (optionally containing aluminium) is heated or compressed to form a 'green body' and then calcined to produce the body.

Item Type: Patent
Subjects: Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Calcium sulfate -- Permeability, Phosphates, Binding sites (Biochemistry), Porosity
Publisher: WIPO: World Intellectual Property Organization
Place of Publication: Geneva
Official Date: 25 November 2011
Dates:
DateEvent
25 November 2011Published
DOI: WO/2010/133898
Publication Status: Published
Access rights to Published version: Open Access

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