Use of at least one 3,4,5-trihydroxy-benzoic acid methyl ester compounds as an additive for hydraulic binder, mortar or concrete, where the hydraulic binder is useful e.g. for the fabrication of elements or materials in construction

摘要

Use of at least one 3,4,5-trihydroxy-benzoic acid methyl ester compounds (I) or their salts as an additive for hydraulic binder, mortar or concrete, is claimed. Use of at least one 3,4,5-trihydroxy-benzoic acid methyl ester compounds of formula (I) or their salts as an additive for hydraulic binder, mortar or concrete, is claimed. R 1>, R 2>1-4C alkyl; R 3>H, 1-18C alkyl, OH or 1-18C alkoxy; and n : 0-100. Independent claims are included for: (1) the hydraulic binder comprising (I); and (2) concrete or mortar, comprising (I). [Image].