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)


Related articles:

Issue 2018-6 WO2018062583 (A1)

(22) 28.09.2016 (43) 05.04.2018 (57) Disclosed is a polycarboxylic acid-based copolymer compound formed as a result of the copolymerization of a polyalkylene glycol monoalkenyl ether monomer and an...

Issue 2018-11 EP3371100 (A1)

(22) 03.11.2016 (43) 12.09.2018 (57) Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of...

Issue 2018-3 WO 2017/221749 A1

(22) 09.06.2017 (43) 28.12.2017 (57) Provided are: a high early strength agent for cements, which exhibits excellent initial strength developability and excellent fluidity, while having excellent...

Issue 2016-3 US 2016/0016113 A1

(22) 30.09.2015 (43) 21.01.2016 (57) The description relates to reducing hydrochloric acid in cement kilns. In one aspect, an aqueous copper-based chlo­ride remediator is introduced into contact with...

Issue 2019-12 US 2019/0284095 A1

(22) 15.05.2017 (43) 19.09.2019 (57) This application relates to a polymer that is useful as a cement additive, wherein the polymer is produced by copolymerisation of an olefinic mono-carboxylic acid...