Liquid colorant dispersions for plastics

Details Liquid colorant dispersions for plastics Liquid colorant dispersions for plastics

1974-02-27

1976-05-11

Hayes, Lorenzo B.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308Q, 106308F, C09C 308

Patent

active

039560082

ABSTRACT:
Liquid colorant dispersions preferably comprising 5-70 weight percent colorant and 95-30% vehicle. The colorant is preferably a conventional pigment. The vehicle typically comprises two major components, (1) from 5 to 25 weight percent of a physically active, chemically inert solid in the form of fine particles (less than 90 microns in size), and, correspondingly, (2) from 95 to 75% of a surfactant system. It is often desirable to also include in the vehicle materials which serve as extenders and/or which modify vehicle properties such as rheology. Many times such materials are conventionally known as plasticizers although they do not function as such when used in the dispersions of this invention. The inert solid is preferably calcium carbonate. The preferred surfactant system is a sorbitan ester surfactant, such as sorbitan trioleate. The liquid colorant dispersions are used to color plastics by mixing them with the plastic, for example prior to the plasticizing stage of an injection molding or extrusion operation.

REFERENCES:
patent: 2113539 (1938-04-01), Meister
patent: 2589306 (1952-03-01), Steiner
patent: 2942997 (1960-06-01), Bram et al.
patent: 3318714 (1967-05-01), Coney et al.
patent: 3353974 (1967-11-01), Trimble et al.
patent: 3656982 (1972-04-01), Chapman et al.
patent: 3767444 (1973-10-01), Zeisberger
patent: 3804656 (1974-04-01), Kaliski et al.

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