Surface modified particles and method of making the same

Details Surface modified particles and method of making the same Surface modified particles and method of making the same

1993-02-10

1995-03-28

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106429, 106445, 106447, 106448, 106454, 106459, 106460, 106465, 106471, 106475, 106476, 106477, 106479, 106487, 106490, 106491, 4301066, C04B 1402

Patent

active

054013135

ABSTRACT:
This invention relates to modifying the surface of particles for improved dispersion characteristics in aqueous, solvent, resinous, polymeric, cementitious or the like application systems. In particular, this invention relates to a pigment or filler particle whose surface is coated with at least one electric charge modifying agent and at least one dispersion promoting agent, which has improved dispersibility, coloring, handling, and other processing properties in application systems. The electric charge modifying agent may be selected from the group of Mg, Ca, Ba, Sr, Ti, V, Zr, Cr, Mn, Fe, Co, Ni, Cu, Zn, and Al. The dispersion promoting agent may be selected from the group of stearates, acetates, alkylphenols, cellulosics, waxes, lignins, polyacrylics, polyepoxies, polyurethanes, polyethylenes, polystyrenes and polypropylenes, and polymers having functional groups of alcohols, glycols, aldehydes, amides and carboxylic acids. Iron oxide is the preferred pigment particle.

REFERENCES:
patent: 3068109 (1962-12-01), Rodeffer
patent: 4053325 (1977-10-01), Vanderheiden
patent: 4204876 (1980-05-01), Bowden
patent: 4753679 (1988-06-01), Damiano et al.
patent: 4946505 (1990-08-01), Jungk
patent: 4952617 (1990-08-01), Ayala et al.
patent: 4978483 (1990-12-01), Redding, Jr.
patent: 5059250 (1991-10-01), Burrow et al.
patent: 5244649 (1993-09-01), Ostertag et al.

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