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US 7,678,451 B2Granted
Laser light absorbing additive
AssigneeMerck Patent GmbH
InventorsFranciscus W. M. Gelissen, Franciscus G. H. Van Duijnhoven
Life of this patent
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Abstract
Laser light absorbing additive comprising particles that contain at least a first polymer with a first functional group and 0-95 wt. % of an absorber, the weight percentage relating to the total of the first polymer and the absorber and the first polymer being bound in at least a part of the surface of the particles by means of the first functional group to a second functional group, which is bound to a second polymer.
Claims18
Laser light absorbing additive particles comprising:
- a support particle comprised of at least a first polymer having a first functional group and an absorber in an amount between 1-95 wt. % based on total weight of the first polymer and the absorber, wherein the absorber is at least one selected from the group consisting of oxides, hydroxides, sulphides, sulphates and phosphates of metals, and
- a layer surrounding the support particle which is comprised of a second polymer having a second functional group, wherein the layer of the second polymer is bound to the first polymer at a surface of the support particle thereof by means of the first and second functional groups.
Dependencies are inferred from the claim text.