POLYETHER-CONTAINING COPOLYMER

摘要

Copolymers are disclosed, comprising two monomer components (A) and (B), component (A) representing an olefinically-unsaturated monocarboxylic acid or an ester or salt thereof, or an olefinically-unsaturated sulphuric acid comonomer or a salt thereof and the component (B) is an ether comonomer of formula (I). According to the invention, the copolymer shall contain the components (A) and (B) in the proportions 30 to 99 Mol. % and 70 to 1 Mol. %, comonomer component (A) being of the group acrylic acid, methacrylic acid, crotonic acid, isocrotonic acid, allylsulphonic acid, vinylsulphonic acid and suitable salts and alkyl or hydroxyalkyl esters thereof. The invention further relates to a composition, containing the claimed copolymer in addition to a hydraulic binder such as for example, cement, gypsum, lime and anhydrite. Said copolymers are of application as flow-improvers or dispersants for non-set compositions containing a hydraulic binder.