Dispersions containing fatty acid esters of styrenated phenol alkoxylates
View Patent ↗The present invention provides a dispersant for aqueous and non-aqueous systems which can disperse insoluble fine powders in non-aqueous liquids in a short period of time and give long-term dispersion stability to the resulting dispersions without allowing the formation of hard cake or precipitates. The dispersant is a compound of the formula wherein SO is styrene oxide; R is a C 8 -C 22 saturated or unsaturated group; x=0-100; y=1-3; z=0-100 and s=0-100. The dispersant of the invention is also particularly effective for dispersing additives into polymers such as polyesters, polyamides, polycarbonates, polyethylene and polypropylene.
1. A pigment dispersion comprising:
(a) a pigment;
(b) a solvent; and
(c) a dispersing surfactant of the formula:
wherein SO is styrene oxide; R is a C 8 -C 22 saturated or unsaturated group; x=0-100; y=1-3; z=0-100 and s=0-100.
2. The pigment dispersion of claim 1 wherein said pigment is an inorganic pigment.
3. The pigment dispersion of claim 1 wherein said pigment is an organic pigment.
4. The pigment dispersion of claim 1 wherein said dispersion further contains a polymeric resin.
5. The pigment dispersion of claim 1 wherein x=8-20; and y=2-3.
6. The pigment dispersion of claim 5 wherein x=12-18.
7. The pigment dispersion of claim 6 wherein x=15-18.
8. The pigment dispersion of claim 7 wherein R is the radical derived from lauric acid.
9. The pigment dispersion of claim 7 wherein R is the radical derived from oleic acid.
10. The pigment dispersion of claim 7 wherein R is the radical derived from coconut fatty acid.