Abstract: A coating containing flakes made of a thermally conductive material is disposed on the inner surface of the bottom of a cooking vessel. A first portion of the flakes is oriented in the plane of the inner surface and a second portion of the flakes is oriented in the thickness direction of the coating to form a heat conductive pattern. The flakes include flakes having a longest dimension that is greater than the thickness of the coating, thus improving heat transfer from the bottom of the cooking vessel to the upper surface of the coating. The heat conductive pattern includes a plurality of segments that extend outwardly from a center region of the inner surface toward an outer peripheral region. The outwardly extending segments improve heat transfer from the center region to the outer peripheral region, especially when the cooking vessel is heated by a heating element having a diameter smaller than the diameter of the cooking vessel bottom.

Abstract: Smooth, patterned substrates useful in producing decorative cookware are formed by coating a base with a mixture of fluoropolymer and magnetic flakes and magnetically inducing an image in the polymer coating composition. The baked fluoropolymer release coating contains magnetizable flakes, a portion of the flakes being oriented in the plane of the substrate and a portion of said flakes being magnetically reoriented to form a pattern in the coating which is observed in reflected light, the flakes having a longest dimension which is greater than the thickness of said coating. The patterned substrate is formed by applying magnetic force through the edges of a magnetizable die positioned under a coated base to induce an imaging effect or pattern. The coating composition is then cured resulting in a smooth surface, patterned nonstick finish on the substrate.

Abstract: Cookware with a multi-layer, non-stick coating on its cooking surface has a random spattered pattern of raised dots or globules in an inner coat, telegraphing roughness through an outer coating to create texture.

Abstract: An article of cookware is provided with a cooking surface in which a pattern is made by different levels of roughness. A non-stick coating has mica that orients preferentially over the smoother areas of the substrate and randomly over the rougher areas of the substrate.

Abstract: Cookware with a multi-layer, non-stick coating on its cooking surface has a random spattered pattern of raised dots or globules in an inner coat, made by spraying the globules on at an angle to create a random, stone-like appearance.

Abstract: Cookware with a multi-layer, non-stick coating on its cooking surface has a random spattered pattern of raised dots or globules in an inner coat, which is applied by spraying at least two applications, with the first having more coverage and a darker color than the second.

Abstract: Patterned cookware coatings can be obtained with colors not readily available from reflective pigments by additive color mixing of interference colors using oxide coated mica.

Abstract: Metal cookware coated with a multilayer system including a primer with more Al.sub.2 O.sub.3 and a blend of PTFE and PFA or FEP, a midcoat with less Al.sub.2 O.sub.3, and a topcoat with PTFE, and processes for preparing such coating systems.

Abstract: An aluminum insert for a rice cooker is coated before drawing with a three-layer release coating. The coated insert is then deep drawn without damaging the coating. The coating has a high proportion of polytetrafluoroethylene to polyamide-imide and a low level of colloidal silica in the primer.

Abstract: An aluminum insert for a rice cooker is coated before drawing with a three-layer release coating. The coated insert is then deep drawn without damaging the coating. The coating has a high proportion of polytetrafluoroethylene to polyamide-imide and a low level of colloidal silica in the primer. After drawing, the uncoated exterior of the insert may be anodized to provide a durable, attractive finish.

Abstract: An aqueous dispersion of a melt processible, non-elastomeric copolymer of 80 to 99.5 mole percent tetrafluoroethylene and 0.5 to 20 mole percent perfluoro(n-propyl vinyl ether) and its preparation by gelling, drying, grinding and fluorinating the polymerization medium is disclosed.

Abstract: Substantially non-dusting, thermally stable lead chromate pigment composition consisting essentially of lead chromate pigment and at least one organic ester selected from esters of phthalic and terephthalic acids and esters of fatty acids and process of preparation by forming a mixture of lead chromate pigment and water and intimately contacting the mixture with at least one organic ester. The lead chromate pigment composition can be poured, packaged, or otherwise processed in dry form with the formation of far less dust in the work environment than is encountered using conventional lead chromate pigment and exhibits high thermal stability in plastics.

Abstract: Apparatus for collecting the dust arising from a particulate solid comprising a first container with a porous member fitted to an opening therein, a rotatable shaft, transversely mounted inside the first container and supporting a second container, which holds a particulate solid and a means for applying a vacuum to the opening in the first container. In practice, the second container is rotated pouring out the particulate solid and the airborn particles are drawn to the porous member by application of vacuum.

Abstract: Dense silica-encapsulated aluminum flake pigment in aqueous suspension is treated with a carboxylic chromic chloride. Such treated pigment is stabilized against gassing when in contact with water. Aqueous-based coating compositions containing such pigment exhibit improved storage stability.