HRP20181461 (T1)

Portland cement additives consisting of a reducing agent embedded in a polymer matrix

(22) 12.09.2018

(43) 02.11.2018

(57) Summary of the corresponding patent EP2662346 (A1): A method is described for reducing hexavalent chromium in common cements and cement based materials comprising the addition, to said cements, of a suitable reducing agent embedded in a polymer matrix consisting of polyvinyl acetate (PVA), polyvinyl alcohol (PVOH), polyglycolic acid (PGA), polyglycolic acid/lactic acid copolymers (PGA/PLA), polyacrylic acid (PAA), maleic polyanhydride (PMA), acrylic or methacrylic acid/acrylic ester/styrene copolymers, acrylic or methacrylic acid/maleic anhydride copolymers, ethylene/maleic anhydride copolymers, polyester/maleic anhydride copolymers, ethylene oxide/polyethylene oxide copolymers.

(71) Mapei S.p.A. (IT)

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