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...
428403, 428404, 428407, 523200, 524398, 524399, 524406, 524408, 524413, C08K 310
The present invention is a composition comprising an optically variable pigment modified with metal salt selected from the group consisting of salts of transition metals having atomic numbers 21-28; 39-42, 57 and 72-74; and salts of the lanthanide series of rare earth metals having atomic numbers of from 58 to 71. The invention also includes a method for forming the surface treated pigments and coating compositions containing the pigments.
patent: 5135812 (1992-08-01), Phillips et al.
Carpenter Clint W.
Scott S. Kendall
Cain Edward J.
Sabourin Anne Gerry
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