| abstract |
COPOLYMERS BASED ON DERIVATIVES OF INSATURED MONO- OR DICARBOXYLIC ACID AND ALKENYLS OXYALKYLENE GLYCOL, PROCESSES FOR ITS PREPARATION AND USE. Copolymers based on unsaturated mono- or dicarboxylic acid derivatives, oxyalkylene glycol alkenyl ethers and optionally vinyl ester or polyalkylene glycol compounds are also described and their use as additives for aqueous suspensions based on mineral or bituminous binders, in particular cement, plaster, lime, anhydrite, or other binders based on calcium sulfate, and based on powdery dispersion binders. The copolymers according to the invention give the aqueous binder suspensions a very good dispersion and liquefaction action with excellent simultaneous processing properties at the same time. In addition, the alkenyl ethers of oxyalkylene glycol according to the invention are industrially relatively simple and economical to prepare and require comparatively low initiator concentrations in copolymerization. |