Patent ID: 11858821
Assignee: THE GOODYEAR TIRE & RUBBER COMPANY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 19:
20. A method for making pre-hydrophobated precipitated silica in an aqueous medium comprising: (1) dispersing silica, a phase transfer agent, a catalyst, and a silica coupling agent into water to make an aqueous silica slurry, wherein the silica is rice hull ash silica, wherein the phase transfer agent is methyl tributyl ammonium chloride, and wherein the catalyst is titanium triethanolaminato isopropoxide; (2) allowing the silica coupling agent to react with the silica at a temperature which is within the range of 20° C. to 100° C. to produce the pre-hydrophobated precipitated silica; and (3) recovering the pre-hydrophobated precipitated silica from the aqueous silica slurry.