REMOVAL OF EXCESS DYE AT SPRAYING IN PAINTING CHAMBER Russian patent published in 2014 - IPC C09D7/00 C09D9/04 B05D1/02 B05B15/12 

FIELD: process engineering.

SUBSTANCE: invention relates to removal of excess paint at spraying in painting chamber by separation fluid. Separation fluid contains the components that follow. (a) At least 49.95 wt % of water. (b) At least one non-ionic surfactant. (c) At least 5-50 wt % of organic water-soluble film stabilising component of monomer and polymer polyols. Components (b) and (c) differ. Separation fluid viscosity complies with DIN 53211 at 23°C to make 11-25 s. Proposed method comprises the steps that follow. i) Forcing the gas flow through painting chamber. ii) Bringing excess paint in contact with gas flow the make paint-saturated gas flow. iii) Making of continuous flow of fluid film of separation fluid on gas flow surface. iv) Forcing said gas flow saturated with paint to said surface with forming of first separation fluid saturated with paint. v) Removal of first separation fluid saturated with paint and gas flow with decreased content paint.

EFFECT: efficient removal of excess paint, stable process.

15 cl, 1 tbl, 1 ex