Compositions: coating or plastic – Materials or ingredients – Miscellaneous
Patent
1976-08-06
1979-10-02
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
041697375
ABSTRACT:
An intrachromospheruloid/intraleucospheruloid pigment composition and a process for producing the same: the intrachromospheruloid/intraleucospheruloid pigment composition 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 imbedded 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) 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 imbedded therein particulate leuco pigment composition consisting essentially of inorganic white and/or transparent white pigment material having a different refractive index and primary particles not exceeding 0.2 micron in diameter.
In the process, (a) the organic color pigment material is reduced to an average particle size of 0.2 micron or less, and is then included in an emulsion polymerization of ethylenically unsaturated 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 imbedded therein the still smaller organic color pigment particles; (b) the intraleucospheroloid is prepared in a similar manner and (c) the products of (a) and (b) are combined and bonded together ionically and/or by a bonding agent to produce the intrachromospheruloid/intraleucospheruloid pigment composition.
Procedures for imparting special properties to the products of (a), (b) and (c) are also disclosed.
Cooperation features are also disclosed.
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
Burke, Jr., deceased Oliver W.
Humphreys Victor T.
Derrington James H.
Marion Darrah and Joseph Y. Houghton, Co-trustees
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