| abstract |
The present invention relates to a water soluble, hydrophobic associative copolymer comprising a new type of hydrophobic associative copolymer. The monomer is a block structure comprising a hydrophilic polyalkylene oxide block substantially composed of ethylene oxide groups, and a terminal, hydrophobic polyalkylene oxide block composed of alkylene oxide having at least 4, preferably at least 5 carbon atoms. It includes a polyether group and an ethylenically unsaturated group having. |