| 摘要 |
<p>The invention relates to a flowability improving agent comprising a combination, calculated on a dry product, of: A) 60-99 % by weight of a sulphonated melamine-formaldehyde resin, a sulphonated melamine-urea-formaldehyde resin or a sulphonated naphtalane-formaldehyde resin; C) 0.5-40 % by weight of a boron containing polyhydroxy carboxylic acid or a water-soluble salt of such an acid and possibly D) 0.5-30 % by weight of a compound with general formula (α); a process for the production of the agent and the use of the agent in a cement containing composition.</p> |
