| 摘要 |
A novel copolymer comprising structural units derived from at least one compound having at least two unsaturated, such as allyl or acrylic groups, at least one alkoxypolyalkylene glycol or an ester thereof, at least one 2-propenesulphonate or phosphate, at least one unsaturated carboxylic acid or anhydride, and optionally at least one alkyl acrylate or alkyl methacrylate. Said copolymer is useful as additive, such as water reducing and/or superplasticising additive, in compositions comprising cement. |
