Sulfonated aromatic-formaldehyde condensation products

Details Sulfonated aromatic-formaldehyde condensation products Sulfonated aromatic-formaldehyde condensation products

1974-11-18

1976-05-04

Thomas, Jr., James O.

Compositions

Preservative agents

Anti-corrosion

106308N, 106308S, 260505R, B01F 1700

Patent

active

039546772

ABSTRACT:
Sulfonated aromatic-formaldehyde condensation products are prepared by reacting a sulfonated aromatic compound with formaldehyde to form a condensation product which is neutralized or rendered alkaline by the addition of an aqueous solution of sodium hydroxide and further reacted with a small amount of urea, usually around 0.5 to 1% by weight of the total mass in order to produce a product which can be employed as a dispersant for oil well cementing compositions and exhibits less retardant effect than a similar dispersant prepared without the addition of the urea.

REFERENCES:
patent: 2588602 (1952-03-01), Adams et al.
patent: 3067243 (1962-12-01), Richter et al.
patent: 3193575 (1975-07-01), Nebel et al.
Hattori, "Chemical Abstracts", Vol. 74, (1971), p. 90764g.
Hattori, "Chemical Abstracts", Vol. 67, (1967), p. 67353u.

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