Soft-settling fluosilicate-treated silica flatting agent

Details Soft-settling fluosilicate-treated silica flatting agent Soft-settling fluosilicate-treated silica flatting agent

1977-01-07

1978-06-20

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106288B, 106306, C09C 130

Patent

active

040959945

ABSTRACT:
Finely divided, fluosilicate-treated silica, such as silica flatting agent for use in coating formulations, is prepared by blending in a dry, finely divided state, silica and divalent metal fluosilicate, notably magnesium fluosilicate. In a preferred embodiment, dry pellets of amorphous, precipitated silica and dry magnesium fluosilicate are milled together to produce the fluosilicate-treated flatting agent. In another embodiment, an aqueous solution of magnesium fluosilicate is applied to silica pellets which are then milled.

REFERENCES:
patent: 2625492 (1953-01-01), Young

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