Vinylic filler pigments and processes for producing same

Details Vinylic filler pigments and processes for producing same Vinylic filler pigments and processes for producing same

1976-08-06

1978-08-15

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

8 62, 8 63, 106308M, 260 293, 260 294UA, 260 296NR, 260 296RB, 260 39P, 260 4221, 260 4229, C08L 6110, C08F28900

Patent

active

041071263

ABSTRACT:
Improved insoluble vinylic filler pigment products and process for producing the same. The vinylic filler pigment consists essentially of (a) spheruloids of organic polymer material three dimensionally cross-linked to essential insolubility in any physical solvent and having primary particles in the colloidal size range of about 5 millimicrons to not more than 4.0 microns average diameter and having fixed onto the surfaces thereof from 0.5 to 200% by weight based on the spheruloids of (b) preformed microground insoluble organic and/or inorganic pigment material having an average particle size which is below 0.5 micron in diameter, and less than the average particle size of the vinylic filler spheruloids. The material (b) is intimately combined in aqueous dispersion with a never dried aqueous latex of the spheruloids, and the combination is then recovered. The combination may include, based on the preformed pigment material present, from 0 to an equal weight of a pigment bonding or modifying agent selected from a defined class and from 0 to an equal weight of nitrogenous material selected from a defined class; said improved vinylic filler pigment spheruloids preferably having been treated at a sufficient temperature and time, while in the aqueously wet never previously dried state, with from 0.5 to 35% by weight, based on said spheruloids, of low boiling hydrocarbon solvent preferably applied in conjunction with an oil soluble surface active agent, which treatment prevents the vinylic filler pigment product from forming hard agglomerates on drying, and the so treated improved vinylic filler pigment product thereafter having been dried and thereafter preferably having also been subjected to sufficient heating to effectively remove said low boiling solvent.

REFERENCES:
patent: 2480821 (1949-09-01), Connell
patent: 3190850 (1965-06-01), Burke, Jr.
patent: 3423358 (1969-01-01), Burke, Jr.

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