Laser markable white pigment composition

Details Laser markable white pigment composition Laser markable white pigment composition

1991-03-08

1993-04-27

Michl, Paul R.

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...

524411, 524412, 524413, 524433, 524436, 524437, C08K 322

Patent

active

052062805

ABSTRACT:
A laser markable white pigment composition includes a first pigment which is markable by ultraviolet laser, a second pigment, which is nonabsorbing in the ultraviolet region of the optical spectrum and which has a white appearance in the visible region of the optical spectrum, with the ratio of the amount of first pigment to amount of second pigment being in the range of from 4:1 to 1:10, so that the second pigment is present in an amount sufficient to increase the optical density, that is the whitening effect, of the composition, without adversely affecting the laser markability of the composition, and a carrier which is at least one fluoropolymer transparent in the ultraviolet region of the optical spectrum.

REFERENCES:
patent: 3509082 (1970-04-01), Mays
patent: 3741929 (1973-06-01), Burton
patent: 4111892 (1978-09-01), Kamada et al.
patent: 4218362 (1980-08-01), Honjo et al.
patent: 4654290 (1987-03-01), Spanjer
patent: 4957961 (1990-09-01), Chandrasckaren et al.

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