Polyolefin dispersion technology used for resin coated sand
View Patent ↗A polymer-coated particulate material having: a particulate substrate; and an applied compound, wherein the applied compound coats at least 50% of the surface of the particulate substrate, and wherein, at the time of application, the applied compound includes a dispersion including: a thermoplastic polymer; and a stabilizing compound. In another aspect, embodiments disclosed herein relate to a method of forming a polymer-coated particulate material, the method including the steps of: incorporating a particulate substrate and a dispersion, the dispersion comprising: a thermoplastic polymer; a stabilizing compound; and a dispersion medium selected from the group consisting of an organic solvent, water, and combinations thereof; removing at least a portion of the dispersion medium.
1. A method of forming a polymer-coated particulate material, the method comprising:
preparing a dispersion, the dispersion comprising:
a thermoplastic polymer;
a stabilizing compound; and
a dispersion medium selected from the group consisting of an organic solvent, water, and combinations thereof;
preheating a particulate substrate material to from 60° C. to 350° C.,
mixing the preheated particulate material and the dispersion with agitation,
allowing at least a portion of the dispersion medium to evaporate,
removing at least a portion of the evaporated dispersion medium,
and cooling the polymer-coated particulate material.
2. The method of claim 1 , further comprising preheating the particulate substrate to a temperature greater than 100° C.
3. The method of claim 1 , further comprising heating the mixture of the particulate substrate material and the dispersion to a temperature greater than 100° C.
4. The method of claim 1 , wherein the thermoplastic polymer is selected from the group consisting of: propylene-based homopolymers, copolymers, interpolymers, and multi-block interpolymers; ethylene-based homopolymers, copolymers, interpolymers, and multi-block interpolymers; and combinations thereof.
5. The method of claim 1 , wherein the thermoplastic polymer is selected from the group consisting of propylene-based multi-block interpolymers, ethylene-based multi-block interpolymers and combinations thereof.
6. The method of claim 1 , wherein the particulate substrate is selected from the group consisting of mineral grains, sands, and rubber particles.
7. The method of claim 1 , wherein the particulate substrate is a silica-based sand.
8. The method of claim 1 , further comprising frothing the aqueous dispersion.
9. The method of claim 1 , further comprising combining an adhesion promoter with the particulate substrate.
10. The method of claim 1 , further comprising cross-linking at least a portion of the thermoplastic polymer.
11. The method of claim 1 , wherein the applied compound further comprises one or more ultraviolet inhibitors.
12. The method of claim 1 , wherein the applied compound further comprises an algae inhibitor, an antimicrobiological agent, a biocide, a fungicide, or combinations thereof.