Set retarding compounds for use in cement slurries

C - Chemistry – Metallurgy – 04 – B

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C04B 24/12 (2006.01)

Patent

CA 1223280

ABSTRACT OF TEE DISCLOSURE Polymers which are the reaction product of N-aminoethylpiperazine and a dihalo or epoxy- halo compound are subsequently phosphonomethylated to provide products which are useful as cement set retarders.

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