Patent ID: 7399353
Filing Date: 2008-07-15
Classification: B08B,B82Y,C01P,C09C,C09D,C09K,D06M,Y10T

Abstract:
1. A process for producing a suspension of hydrophobic oxide particles that has a defined, adjustable viscosity, wherein said process consists of suspending low structured hydrophobic oxidic particles in a suspension medium, and adding from 0.05 to 15% by weight based on the suspension medium, of high structured oxidic particles, wherein the low structured hydrophobic oxidic particles are hydrophobic oxidic particles that, compared with the corresponding high structured hydrophobic oxidic particles, have an at least 30% reduced dibutyl phthalate absorption and an at least 50% higher tamped density, wherein the suspension medium consists of at least one organic suspension agent, and optionally, at least one suspension agent selected from the group consisting of water, alcohols, ketones, ethers, esters, aliphatic hydrocarbons, aromatic hydrocarbons, amides, sulfoxides, and combinations thereof, and wherein the at least one organic suspension agent is selected from the group consisting of dimethylsulfoxide, toluene, tetrahydrofuran, cyclohexanone, dimethylformamide, and combinations thereof.