METHOD OF PREPARING CONCENTRATED MODIFIED POLISHING SUSPENSION Russian patent published in 2005 - IPC

FIELD: abrasive materials.

SUBSTANCE: invention relates to production of polishing suspensions for optical parts. Polishing powder based on solid solution of cerium dioxide and lanthanum, neodymium, and praseodymium oxide and oxyfluoride mixture is soaked in water at 70-80°C and stirring, after which precipitate is separated, washed, and diluted with distilled water until suspension with required density is obtained at medium pH 6-8. Suspension is filtered with the aid of mug through capron sieve with mesh corresponding to particle size of polishing powder, whereupon modifying additive is added in amount 0.11-0.15% on suspension solids, said additive being soluble potassium, sodium, or ammonium salt of methylmethacrylate/methacrylic acid copolymer. Suspension is additionally homogenized by rotary-pulsation apparatus.

EFFECT: increased aggregative and sedimentation stability preventing foaming and allowing quality and effective treatment of any kinds of optical glasses, including soft and scabbing ones.

2 cl, 1 dwg, 2 tbl