Abstract:
Spreadable thixotropic coating composition suitable for rust removal and containing polyvinylpyrrolidone, water and a thixotropic agent which is either xanthan gum or water-soluble crosslinked interpolymer of maleic anhydride, monovinyl alkyl ether and crosslinking agent. The composition has a pH between about 1.5 and 7.0 is applied to rusty metal surfaces and allowed to dry. During drying the rust becomes incorporated into the coating which is then easily removed.
Abstract:
A method for conditioning, e.g., by buffing or polishing, the surfaces of thin materials, e.g., elongated metal molding strips and the like, is disclosed as including the steps of passing the thin material axially through a conditioning zone for contact with a conditioning device, establishing a relative motion between the conditioning device and the thin material to condition the surfaces of the thin material, and controlling the relative motion such as to impart forces to and establish stresses in the thin material so as to maintain the thin material in a state of net axial stress in an amount less than the yield stress of the material. Disclosed apparatus for conditioning thin material may include a means for passing the thin material through a conditioning zone and conditioning means for conditioning the surfaces of the thin material while maintaining the material in the conditioning zone in a state of net axial stress in an amount less than the yield stress of the material.