| 摘要 |
A low plate-out fluorescent pigment concentrate containing from about 5 up to about 40 weight percent of a fluorescent pigment, based upon the total weight of the fluorescent pigment concentrate, about 5 to about 20 weight percent of an inorganic filler, based upon the total weight of the fluorescent pigment concentrate, and a minimum of 2 up to about 10 weight percent of a silica gel or a precipitated silica, based upon the total weight of the fluorescent pigment concentrate. The inert filler has an average particle size of about 2 microns or less. There is also from about 1 to about 10 weight percent of an organic polymer selected from the group consisting of (i) an oxidized polyethylene wax, (ii) an unoxidized polyethylene wax, (iii) a low molecular weight ethylene-acrylic acid copolymer, (iv) a bivalent metal salt of (1) or (iii), and (v) a combination of at least two of (i), (ii), (iii) and (iv), based upon the total weight of the fluorescent pigment concentrate. The remainder of the concentrate is an ethylene polymer up to 50 weight percent, based upon the total weight of the fluorescent pigment concentrate. The molecular weight of the ethylene polymer is substantially greater than that of the oxidized or unoxidized polyethylene wax.
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