Incorporation of food grade dyestuffs into resinous compositions

Details Incorporation of food grade dyestuffs into resinous compositions Incorporation of food grade dyestuffs into resinous compositions

1972-02-25

1978-07-25

Lieberman, Allan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106180, 106193D, 106241, 106308F, 260 37P, 260 4221, 260 40R, C08J 320, C08K 500

Patent

active

041028481

ABSTRACT:
The invention described relates to a method for the manufacture of resinous formed articles which are color tinted with dyestuffs which are normally considered to be incompatible therewith. These dyestuffs, such as certified F.D. and C Yellow No. 5, are accepted non-toxic colorants for foods, drugs and cosmetics but by themselves are normally incompatible with oils, waxes and resins. By first complexing these water soluble, resin insoluble dyestuffs with a polyhydric alcohol, such as glycerine, and subsequently the higher fatty acid ester decaglycerol tetraoleate in the presence of heat, it is possible to prepare a uniformly colored resin solution or paste which can be further cured to form a color tinted transparent plastic film or sheet useful in the packaging of foods, drugs and cosmetics. The resinous substrate which is colored may be either a thermoplastic resin such as polyvinyl chloride, polyvinyl acetate or polyethylene polypropylene, or acrylic resins alone or blended with ABS rubber and other copolymers. It may also be a thermosetting resin, such as a polyester.

REFERENCES:
patent: 3148125 (1964-09-01), Strianse et al.
patent: 3222355 (1965-12-01), Gaetani
patent: 3677691 (1972-07-01), Koch
Polythene--Renfrew & Morgan, Interscience, 1957, p. 435.

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