Laser beam absorbing resin composition, coloring material theref

Details Laser beam absorbing resin composition, coloring material theref Laser beam absorbing resin composition, coloring material theref

1996-02-15

1996-11-26

Szekely, Peter A.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106401, 106446, 106450, 106467, 106470, 106482, 106483, 2525011, 252520, C09C 136, C09C 102, C04B 1402, C08K 300

Patent

active

055781209

ABSTRACT:
A laser beam absorbing resin composition is disclosed which includes 100 parts by weight of a resin, and 1-100 parts by weight of composite particles having an average particle diameter of 0.1-50 .mu.m and each including a particulate, laser beam absorbing inorganic substance, and a colorant physically bonded directly to the inorganic substance and capable of discoloring upon being heated at a temperature of 250.degree. C. or more, the weight ratio of the colorant to the inorganic substance being in the range of 1:99 to 50:50. 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 discriminative from that of non-irradiated surface.

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