CEMENT SLURRY FOR BORING DEEP WELL CONTAINING COPOLYMER FOR REDUCING WATER LOSS
Cement slurries for deep holes, with a content of copolymers which are composed of 5-95% by weight of groups of the formula in which R1 is hydrogen or methyl, R2 is C2-C10-alkylene and Me is ammonium, lithium, sodium or potassium, of 5-60% by weight of groups of the formula (III) in which R3 is hydr...
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