Treatment of pigment

Details Treatment of pigment Treatment of pigment

1976-06-04

1977-10-04

Garvin, Patrick P.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308B, C09C 136

Patent

active

040522245

ABSTRACT:
A process for the treatment of titanium dioxide pigment which involves adding to a pigment slurry a compound of phosphorus, of aluminium, of zirconium, of titanium and of silicon, adjusting the pH of the slurry to a value of from 3.5 to 4.5, followed by adding to the slurry a compound of phosphorus of an alkaline reacting compound of aluminium prior to the addition of mineral acid to adjust the pH of the slurry to a value of 6.5 to 8.

REFERENCES:
patent: 3497373 (1970-02-01), Rieck et al.
patent: 3515566 (1970-06-01), Moody et al.
patent: 3556828 (1971-01-01), Durrant et al.
patent: 3567479 (1971-03-01), Portes et al.

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