Intrachromospheruloid pigments and processes for producing same

Details Intrachromospheruloid pigments and processes for producing same Intrachromospheruloid pigments and processes for producing same

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

041325613

ABSTRACT:
An intrachromospheruloid pigment and a process for producing the same: the intrachromospheruloid pigment consisting essentially of 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 pigment composition consisting essentially of organic color pigment material having primary particles of an average size not exceeding 0.2 micron in diameter. 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 embeded therein the still smaller organic color pigment particles.

REFERENCES:
patent: 2751369 (1956-06-01), Te Grotenhuis
patent: 2786822 (1957-03-01), Vesce
patent: 3133893 (1964-05-01), Newman
patent: 3423358 (1969-01-01), Burke
patent: 3502582 (1970-03-01), Clemens
patent: 3700690 (1972-10-01), Burke

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