Mixtures of titanium dioxide and porous synthetic magnesium silicate in opacified emulsion paints
AssigneeSCM Corporation
InventorsAlexander Ramig, Jr., Stephen T. Bowell
Life of this patent
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Abstract
An improved opacified aqueous latex paint containing film-forming latex binder having the major weight portion of latex polymer particles not smaller than about 1000 A, and opacifying pigment wherein at least about 1% by weight of the opacifying pigment is porous synthetic magnesium silicate. The porous magnesium silicate has an average particle size of about 5 to 20 microns and porosity comprising a plurality of pores between 0.03 microns to 0.9 microns.
Claims2
In an opacified aqueous dispersion paint composition having film-forming latex binder and between about 5% and 50% opacifying pigment on a dry solid volume basis, the improvement comprising:
- said opacifying pigment comprising titanium dioxide and porous synthetic magnesium silicate wherein said paint contains between about 1% to 30% of said porous synthetic magnesium silicate on a dry solid volume basis, said porous synthetic magnesium silicate having a porosity of between about 30% and 80% by volume and pore diameters between about 0.03 microns and 0.9 microns, said porous magnesium silicate having an average particle size between about 5 to 20 microns;
- and
- said film-forming latex binder particles being between about 1000 A and 10,000 A.
Dependencies are inferred from the claim text.