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US 10,717,089 B2Granted
Aqueous separation liquid and process for removing paint overspray from a paint spray booth
AssigneePPG Industries Ohio, Inc.
InventorsFrank Scharrenbach, Desiree Hofmann, Dietmar Kascha
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Abstract
The present invention relates to an aqueous separation liquid comprising at least 49.9 wt. % water, 5 to 50 wt. % of at least one organic water-soluble polyol, based on the total weight of the aqueous separation liquid, and at least one low molecular weight cellulose derivative as rheology modifier, and to the use of this liquid in a process for removing paint overspray from a paint spray booth.
Claims20
An aqueous separation liquid for capturing paint overspray from a gas stream comprising:
- a) at least 49.9 weight percent water, based on the total weight of the aqueous separation liquid,
- b) 5 to 50 weight percent of at least one organic water-soluble polyol, based on the total weight of the aqueous separation liquid, and
- c) at least one cellulose derivative having a viscosity of less than 200 mPa·s as measured with a Visco Tester VT5 using a R2 spindle at a velocity of rotation of 60 rpm and a temperature of 20° C. for a 1 weight percent solution of the cellulose derivative in water, based on the total weight of the solution,
- wherein components b) and c) are different from each other, and
- the aqueous separation liquid has a viscosity in terms of outflow time in the range from 11 s to 50 s, as measured according to ISO 2431:2011 using a 4 mm flow cup at 20° C.
2 more elements
Dependencies are inferred from the claim text.