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US 6,635,207 B1Granted
Process for recycling of powder coating waste
AssigneeE. I. Du Pont de Nemours and Company
InventorRené Graewe
Life of this patent
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Abstract
Process for recycling of powder coating waste, wherein powder coating waste is moved in a vessel rotating about a rotational axis inclined at an angle of 20 to 70 degrees to the horizontal and is thereby exposed to heat, until powder coating agglomerates with a size of 1 mm to 3 cm or 1 to 10 mm or powder coating pearls with a size of 1 to 10 mm are formed.
Claims16
A process for recycling of powder coating waste without application of pressure or addition of auxiliary products, comprising the steps of:
- placing powder coating waste into a vessel;
- rotating the vessel about a rotational axis inclined at an angle of 20-70 degrees relative to the horizontal;
- and
- exposing the rotating powder coating waste to heat at a temperature below the melting temperature of the powder coating waste until particulates having a size within the range of 1 mm to 3 cm are formed.
1 more element
Dependencies are inferred from the claim text.