Laser beam absorbing resin composition and laser beam marking me

Details Laser beam absorbing resin composition and laser beam marking me Laser beam absorbing resin composition and laser beam marking me

1993-09-24

1995-08-29

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

430332, 430338, 430346, 430495, 430945, G03C 1725

Patent

active

054459230

ABSTRACT:
A laser beam absorbing resin composition is disclosed which includes 100 parts by weight of a thermosetting resin, a colorant capable of discoloring upon being heated at a temperature of 250.degree. C. or more, and at least 10 parts by weight of a particulate, laser beam absorbing substance which has an average particle size of 50 .mu.m or less and which is at least one member selected from cordierite and zeolite. By irradiating a shaped, hardened body of the above composition with a laser beam, the colorant is thermally decomposed, so that the color of the irradiated surface is changed and becomes discriminitive from that of non-irradiated surface.

REFERENCES:
patent: 3983564 (1976-09-01), Nakazawa et al.
patent: 4013566 (1977-03-01), Taylor et al.
patent: 4358552 (1982-11-01), Shinohara et al.
patent: 4392141 (1983-07-01), Inoue et al.
patent: 4401992 (1983-08-01), Vorst et al.
patent: 4510512 (1985-04-01), Okamoto et al.
patent: 5035983 (1991-07-01), Kiyonari et al.
patent: 5229438 (1993-07-01), Ishida et al.
English language abstract of JP 4-267191, "Laser Marking and Resin Compsoition Therefor", Kiyonari et al., Sep. 1992.

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