Abstract: An improved method and apparatus for adding relatively small amounts of one or more liquid additives to powder coating composition where the liquid is sprayed onto granular or particulate components of the powder composition during mechanical mixing to blend the components before further homogenizing by a melt mixing process.

Abstract: This invention relates to a powder coating composition made by combining at least two components comprising (A) a film forming thermosetting resin composition; and (B) a transfer-efficiency enhancing amount of at least one amide; wherein component (B) is incorporated into the powder coating composition by the addition of component (B) to an extruded composition comprising components other than (B). The invention also relates to a method for coating a substrate using the foregoing powder coating composition.

Abstract: This invention relates to a powder-coating composition made from at least two components comprising: (a) a film-forming resin composition; and (b) a transfer efficiency-enhancing amount of at least one additive compound comprising a 5- or 6-membered ring, the ring atoms of the ring comprising at least two heteroatoms; one heteroatom being nitrogen, the second heteroatom being selected from the group consisting of nitrogen, oxygen, and sulfur; said compound having at least one hydrocarbyl substituent of 1 to about 50 carbon atoms; wherein component (B) is incorporated into the powder coating composition by addition of component (B) to an extruded composition comprising components other than component (B). The invention also relates to a method of coating a substrate using the foregoing powder coating composition.

Abstract: This invention relates to a powder coating composition made from at least two components comprising (A) a film forming resin composition; and (B) a transfer efficiency enhancing amount of at least one aromatic ring compound containing at least two substituents, wherein one of the two substituents is selected independently from the group consisting of (i) groups containing at least one carboxy or a carboxy producing moiety; (ii) alkoxy groups; and (iii) halogen groups; and the second substitutent is a nitro or a halogen group; wherein component (B) is incorporated into the powder coating composition by addition of component (B) to an extruded composition comprising components other than component (B) The invention also relates to a method for coating a substrate using the foregoing powder coating composition.

Abstract: A method and apparatus for measuring the transfer efficiency during the electrostatic spraying of a coating material (e.g. powder coating) is provided. The transfer efficiency can be measured during the test cycle rather than measuring an average transfer efficiency for an electrostatic spray cycle. A cycle may include the initial time when the substrate is "uncoated or clean" and an end point of the test when electrical insulating effects caused by accumulated powder on the substrate lead to a reduction in the transfer efficiency. The method uses computer based calculation software and a computer. The computer is connected to load cells that measure weight changes of a target substrate and a vessel containing the coating material to be sprayed.

Abstract: A process for producing a powder coating composition having powder particles wherein at least 50% of the particles are of a size between 3 and 5 microns and 100% of the particles are of a size .ltoreq.10 microns. The process includes the steps of preparing a powder coating extrudate, reducing the extrudate to flake, jet milling the powder coating to a powder wherein at least 50% of the particles are a particle size of between 3 and 5 microns and 100% of the particles are of a size less than or equal to 10 microns, and adding the powder to a mixture of water and surfactant. Dispersant and rheology control agents are then added to the mixture.

Abstract: Resin is mixed with graphite particles to form a blendable, processable premold coating. When the premold coating is incorporated onto the surface of a premold coated molded plastic product produced by the premold process, said coating is rendered electrostatically conductive.

Abstract: Resin is mixed with graphite particles to form a blendable, processable premold coating. When the premold coating is incorporated onto the surface of a premold coated molded plastic product produced by the premold process, said coating is rendered electrostatically conductive.

Abstract: After the tube portion to be removed is severed from the remainder of the U-tube and its weld to the header is machined off, the internal surface of the portion is engaged internally by an ID gripper and pulled out of the header. Then the external surface is engaged by an OD gripper and pulled further out of the header. The first tube length is pulled out as far as the space under the header permits and is then cut off. Successive lengths are likewise pulled out and cut off.The apparatus for accomplishing this object includes a base secured to the header by expanded mandrel mechanisms. A carriage is suspended from the base on screws which are driven by a motor to move the carriage away from and towards the base. An OD gripper assembly is suspended from the carriage and is movable by fluoroactuated piston rods away from and towards the carriage. An ID gripper assembly extends through the OD gripper assembly. The gripper of the ID assembly is actuable to engage the internal surface of the tube portion.

Abstract: The irradiation specimen installation apparatus comprises a gripper mechanism capable of being disposed through a hole in the nuclear reactor core barrel flange and capable of gripping the irradiation specimen. The apparatus is also capable of transporting the irradiation specimen so that the irradiation specimen can be deposited in the specimen container. The apparatus also comprises a visual verification mechanism for positively determining if the irradiation specimen has been properly located in the specimen container. A second instrument may be used in conjunction with this apparatus for seating the irradiation specimen in the specimen container once visual verification of its location has been made.

Abstract: A bushing assembly adapted for installation as a feedthrough type of connection in a transformer, switchgear, sectionalizing point or any other application includes a cast conductor element embedded in a body of molded insulating material, and an insert preformed to close tolerances in said cast element and adapted to cooperate with a section of an insulating material mold to seal the mold during molding of the body of insulating material.