Copolymers based on unsaturated mono- or dicarboxylic acid...

C - Chemistry – Metallurgy – 08 – F

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C08F 222/00 (2006.01)

Patent

CA 2554763

The invention relates to copolymers based on unsaturated mono or dicarboxylic acid derivatives, oxyalkyleneglycol-alkenyl ethers, vinyl polyalkyleneglycol or ester compounds, in addition to the use thereof as additives for aqueous suspensions based on mineral or bituminous binding agents. Said invention is characterised in that the inventive copolymers, having a long lateral chain, impart small amounts of excellent processing properties to aqueous binding suspensions, and simultaneously, cause the water content in the concrete to be greatly reduced. Furthermore, the inventive copolymers cause, compared to prior art, dramatically increased early strength development which enables profitability, in particular in the construction of concrete, to be drastically increased.

La présente invention concerne des copolymères à base de dérivés d'acide mono- ou dicarboxylique insaturés, d'alcényléthers d'oxyalkylèneglycol, de polyalkylèneglycol vinylique ou de composés ester, ainsi que leur utilisation en tant qu'additifs pour suspensions aqueuses à base de liants minéraux ou bitumineux. Cette invention est caractérisée en ce que lesdits copolymères à longues chaînes latérales confèrent aux suspensions aqueuses, même à un dosage minimal, d'excellentes propriétés de mises en oeuvre et impliquent en même temps une grande réduction d'eau dans les bétons. De plus, les copolymères selon cette invention impliquent, par comparaison à l'état de la technique, un développement de la résistance initiale extrêmement élevé, ce qui permet d'augmenter énormément la rentabilité, notamment dans les constructions en béton.

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