Plastic colored with transparent iron oxide spinels

Details Plastic colored with transparent iron oxide spinels Plastic colored with transparent iron oxide spinels

1981-08-24

1983-09-06

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524434, 524435, C08K 310

Patent

active

044030606

ABSTRACT:
The subject invention relates to the use of certain iron oxide spinels to color plastics. The iron oxide spinels are acicular particles having an average length of less than 0.1 micron and are represented by the formulae XFe.sub.2 O.sub.4 or YFe.sub.5 O.sub.8 in which X is a metal selected from the group consisting of Zn, Sn, Cu, Ca, Cd, Co, Ba, Sr, Mg, Al, and Mn, and Y is Li. The spinels are incorporated into plastics by methods which are known to those of ordinary skill in the art. The resulting plastics can be made with a wide variety of colors and can be used to coat surfaces without hiding the underlying surface.

REFERENCES:
patent: 3959208 (1976-05-01), Baskin
patent: 4002592 (1977-01-01), Baskin
patent: 4292294 (1981-09-01), Patil et al.
Murray: Pigmentation of Colored Plastics, Pigment Handbook, vol. II, pp. 277-285, John Wiley & Sons, 1973.

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