Method for treating paint booth water systems
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorKathryn E. Foster
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Abstract
The invention is a composition and method for treating paint booth water systems to facilitate paint removal. The composition comprises water, solid particles of insoluble organic polymer, such as, by way of non-limiting example, urea methanal copolymer, preferably including less than 50 weight percent of particles of diameter of 1 micron or less, and optionally surfactants, thickeners, polymeric flocculents different from the organic polymer, clarifiers, anti-corrosive components, and/or biocides.
Claims18
A method of treating and removing paint contained in resident water of a paint booth water system comprising:
- a) adding an aqueous composition(I) to the paint booth water system, said composition comprising,
- 1) a first component comprising solid particles of infusible urea methanal polymer dispersed in said composition;
- 2) a second component selected from the group consisting of surfactants, thickeners, polymeric flocculents different from 1), and mixtures thereof, and optionally
- 3) clarifiers, anti-corrosive components, and/or biocides,
- b) mixing the aqueous composition with resident water of the paint booth water system to form a detackified paint flocculent;
- c) removing the paint flocculent from the paint booth water system.
A method of treating and removing paint contained in used resident water of a paint booth water system comprising:
- a) adding an aqueous composition(I) to the paint booth water system, said composition comprising,
- i. a first component comprising solid particles of infusible urea methanal polymer dispersed in said composition;
- ii. a second component selected from the group consisting of surfactants, thickeners, polymeric flocculents different from i), and mixtures thereof;
- and optionally
- iii. clarifiers, anti-corrosive components, and/or biocides
- b) mixing the aqueous composition with the used resident water of the paint booth water system to form a detackified paint flocculent and clarified resident water having lower turbidity than said used resident water,
- c) removing the paint flocculent from the paint booth water system.
A method for treating paint booth water systems to facilitate paint removal comprising:
- a. adding an aqueous composition(I) to the paint booth water system, said composition comprising,
- i. a first component comprising particles of an infusible urea methanal dispersed in said composition, said polymer comprising reactive methylol groups;
- and
- ii. a second component comprising at least one of a surfactant, a thickener and a polymeric flocculent different from i);
- b. mixing the aqueous composition with resident water of the paint booth water system to form a detackified paint flocculent,
- c. removing the paint flocculent from the paint booth water system;
- wherein the particles of i) have an average particle size of from about 1.5 to 18 microns, and less than 40% of said particles are colloidal.
A method for detackifying and flocculating paint in a paint booth water system comprising:
- a. adding an aqueous composition(I) to the paint booth water system, said composition consisting essentially of water and;
- i. a component comprising dispersed insoluble solid infusible urea methanal polymer;
- ii. one or more surfactants and/or polymeric flocculents different from i);
- and optionally
- iii. clarifiers, anticorrosive components, thickeners and/or biocides;
- b. mixing the aqueous composition with resident water of the paint booth water system to form a detackified paint flocculent;
- c. removing the paint flocculent from the paint booth water system;
- wherein less than 50 weight percent of said polymer is particles of diameter 1 micron or less.
Dependencies are inferred from the claim text.