TREATED INORGANIC PIGMENTS HAVING IMPROVED BULK FLOW AND THEIR USE IN POLYMER COMPOSITIONS
The disclosure provides a polymer composition comprising a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m 2 /g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.
1 . A polymer composition comprising a high molecular weight melt processable polymer and a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m 2 /g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5% based on the total weight of the treated inorganic pigment, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.
2 . (canceled)
3 . The polymer composition of claim 1 wherein the high molecular weight melt processable polymer is selected from the group consisting of polymer of ethylenically unsaturated monomers; copolymer of ethylene with higher olefins; vinyl polymer, polyvinyl ester; polystyrene; acrylic homopolymer; acrylic copolymer; phenolic polymer; alkyd polymer; amino resin; epoxy resin, polyamide, polyurethane; phenoxy resin, polysulfone; polycarbonate; polyester and chlorinated polyester; polyether; acetal resin; polyimide; polyoxyethylenes; rubber, elastomer; natural or synthetic polymer based on copolymerization, grafting, or physical blending of various diene monomers; and mixtures thereof.
4 . The polymer composition of claim 3 wherein the high molecular weight melt processable polymer is selected from the group consisting of polyolefin, polyvinyl chloride, polyamide, polyester, and mixtures thereof.
5 . (canceled)
6 . The polymer composition of claim 4 wherein the high molecular weight melt processable polymer is a polyolefin, wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, and mixture thereof.
7 . (canceled)
8 . The polymer composition of claim 1 wherein treated inorganic pigment is present in the amount of about 30 to about 90% by weight, based on the total weight of the polymer composition.
9 . The polymer composition of claim 1 wherein the inorganic pigment is ZnS, TiO 2 , CaCO 3 , BaSO 4 , ZnO, MoS 2 , silica, talc or clay.
10 . The polymer composition of claim 9 wherein the inorganic pigment is titanium dioxide.
11 . The polymer composition of claim 1 wherein the inorganic pigment surface area is about 40 to about 70 m 2 /g.
12 . (canceled)
13 . The polymer composition of claim 1 wherein the organic treating agent is a polyalkanol alkane.
14 . The polymer composition of claim 13 wherein the polyalkanol alkane is trimethylolpropane, trimethylolethane, glycerol, ethylene glycol, propylene glycol, 1,3propanediol, or pentaerythritol.
15 . (canceled)
16 . The polymer composition of claim 1 wherein the organic treating agent is a polyalkanol amine.
17 . The polymer composition of claim 16 wherein the polyalkanol amine is 2-amino-2-methyl-1-propanol, triethanol amine, monoethanol amine, diethanol amine, 1-amino 2-propanol, or 2-amino ethanol.
18 . (canceled)
19 . The polymer composition of claim 1 wherein the organic treating agent is present in the amount of at least about 1.8% based on the total weight of the treated inorganic pigment.
20 . (canceled)
21 . The polymer composition of claim 1 wherein the inorganic pigment is further treated with metal oxides.
22 . The polymer composition of claim 21 wherein the metal oxide treatment comprises silica, alumina, tungsten, zirconia, zinc oxide, or molybdenum oxide.
23 . The polymer composition of claim 22 wherein the metal oxides are present in the amount of 0.1 to about 20 wt %, based on the total weight of the treated inorganic pigment.
24 . The polymer composition of claim 1 comprising a masterbatch.
25 . A part prepared from a polymer composition wherein the polymer composition comprises a high molecular weight melt processable polymer and treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m 2 /g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5% based on the total weight of the treated inorganic pigment, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.
26 . The part of claim 25 comprising a shaped article.