Set retarding additives for cement from aminomethylenephosphonic

Details Set retarding additives for cement from aminomethylenephosphonic Set retarding additives for cement from aminomethylenephosphonic

1983-06-01

1984-08-28

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106315, C04B 735

Patent

active

044682522

ABSTRACT:
Compounds useful as cement set retarding additives have been found which have the formula ##STR1## wherein A, B, C and D substituents are independently selected from hydrogen, methylenephosphonic acid, or salts thereof, hydroxypropyltrialkylammonium halide, wherein the trialkylammonium moiety contains alkyl groups having from 1 to 5 carbon atoms and n is 0 to 15, and wherein said substituents include at least one methylenephosphonic acid group, or salt thereof, and at least one hydroxypropyltrialkylammonium halide group.

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Chem. Abstracts: 97, 112352a-"Plugging composition for cementing oil and gas wells", Dytyuk, L. T. et al.
Chem. Abstracts: 97, 26178a-"Plugging fluids for cementing deep petroleum and gas wells", Alekseev, P. D. et al.
Chem. Abstracts: 98, 58912p-"Improvement of casing cementation in deep and ultradeep wells. Part 2. Deep well cements and additives." Arens, K. H. et al.

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