Compositions: coating or plastic – Materials or ingredients – Miscellaneous
Patent
1976-08-06
1979-01-02
Derrington, James H.
Compositions: coating or plastic
Materials or ingredients
Miscellaneous
106308B, 106308Q, 106308F, 106308N, 106308S, 106309, 260 4214, 260 4215, 260 4216, 260 4221, 260 4253, C08K 902, C08K 904, C08K 910
Patent
active
041325621
ABSTRACT:
An intrachromospheruloid/inorganic pigment composition and a process for producing the same: the intrachromospheruloid pigment consisting essentially of (a) spheruloids of essentially transparent organic polymer material preferably cross-linked to essential insolubility in any physical solvent, having primary particles of an average size not exceeding 4 microns in diameter which have embedded therein particulate organic color pigment composition consisting essentially of organic color pigment material having primary particles of an average size not exceeding 0.2 micron in diameter and (b) an inorganic leuco pigment component combined with (a) to provide light reflectivity to the combination. In the process for its production, the organic color pigment material is reduced to an average particle size of 0.2 micron or less, which is well below the normal pigmentary size range, and is then included in an emulsion polymerization of monomer material preferably comprising an effective quantity of cross-linking agent, and the polymerization is conducted to produce emulsion polymer of an average particle size not exceeding 4 microns in diameter, having embedded therein the still smaller organic color pigment particles which is then further combined, by the process, with inorganic leuco pigment material which preferably comprises high refractive index inorganic pigment material such as is commonly referred to as "White" or as "Opaque White". Cooperative features are also disclosed.
REFERENCES:
patent: 2751369 (1956-06-01), TeGrotenhuis
patent: 2786822 (1957-03-01), Vesie
patent: 3133893 (1964-05-01), Newman
patent: 3423358 (1969-01-01), Burke
patent: 3502582 (1970-03-01), Clemens
patent: 3700690 (1972-10-01), Burke
Burke, Jr., deceased Oliver W.
Humphreys Victor T.
Derrington James H.
Marion Darrah and Joseph Y. Houghton, Co-trustees
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