Method for treating paint sludge
AssigneeAster Co., Ltd.
InventorsMichael Joseph Gerace, Sevilla C. Gamboa, Yasminka S. Landaburu
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Abstract
A method of treating paint sludge containing uncured polymer resin, water and/or solvent is provided in which a paint sludge putty is formed which may be used as a replacement for polymeric components used to form compounded polymeric compositions. The treated paint sludge putty or powder comprises from about 5 to 90% by weight of the total compounded polymeric composition and may be used in a variety of compositions including pressure sensitive sealants, caulking sealants, automotive sealants, polyvinyl chloride plastics, rubbers and asphalt cement coatings, and waterbased sealers and coatings.
Claims14
A method for treating raw paint sludge containing uncured polymer resin, water and/or organic solvent comprising the steps of:
- removing a substantial portion of said water and/or organic solvent by drying said paint sludge without curing said polymer resin;
- and
- decatalyzing said paint sludge by treatment with a decatalyzing agent comprising a base having at pH in the range of from 8-13.
A method for treating raw paint sludge containing water and/or organic solvent and uncured polymer to form a paint sludge putty comprising the steps of:
- adding a decatalyzing agent comprising potassium hydroxide to said sludge;
- and
- heating said sludge at a temperature of about 225.degree. F.
Dependencies are inferred from the claim text.