Compositions: coating or plastic – Coating or plastic compositions – Corrosion inhibiting coating composition
Patent
1983-10-04
1984-12-18
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Corrosion inhibiting coating composition
1061231, 106315, 530500, C07G 100, C04B 902
Patent
active
044889070
ABSTRACT:
The present publication describes a process for the preparation of lignosulfonate-based mixtures used in particular as additives of concrete. According to the process of the present invention, the sulfite spent liquor is treated with a nitrating reagent, such as nitric acid or nitrogen dioxide, and the reacted lignosulfonate is separated from the reaction product, and, together with the reacted lignosulfonate, the nitrate and nitrite compounds are separated from the reaction product, and the product mixture formed by the reacted lignosulfonate, nitrate compounds and nitrite compounds is purified in a way known per se. The product prepared in accordance with the process is suitable in particular for the liquefaction of concrete, for accelerating the setting of concrete, and for inhibiting corrosion of concrete reinforcement steels contained in concrete, if any.
REFERENCES:
patent: 3297676 (1967-01-01), Brauns et al.
patent: 3776897 (1973-12-01), Ikari et al.
patent: 4336189 (1982-06-01), Hamala et al.
patent: 4450106 (1984-05-01), Forss
Flowcon Oy
Morris Theodore
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