Flow agent for aq. suspensions - comprising sulphonic acid-substd. (co)polymer of unsatd. acid amides or imides and formaldehyde condensates with sulphonated aromatics

摘要

Flow agent comprises (co)polymers (I) of unsatd. acid amides or imides with sulphonic acid substd. (cyclo)-alkyl or (alkyl)aryl and condensation prods. (II) of HCHO with sulphonated aromatic ethers, imines and/or sulphones. (I) and (II) are superfluidising agents for cement, anhydrite or plaster. They also produce a longer time of relatively constant fluidising effect with a subsequent fast lowering of this effect. The 28-day-strength of concrete is also improve. The agent may also be used for clays, silicates, chalk, talc, resins pigments, metal oxides and/or hydraulic binders.