Ppg Industries Ohio, Inc.

Joseph M Ferencz

Dennis L Faler

W David Polk

Richard S Tansey

Vincent A Gaspar

Disclosed are aqueous dispersions of polymer-enclosed particles, such as nanoparticles. Also disclosed are methods for making an aqueous dispersion of polymer-enclosed particles, polymerizable polymers useful in such a method, powder coating compositions formed from such an aqueous dispersion, substrates at least partially coated with such a composition, and reflective surfaces comprising a non-hiding coating layer deposited from such a composition.

Aqueous dispersions of polymer-enclosed particles, related coating compositions and coated substrates

Disclosed are powder coating compositions suitable for producing a decorative and durable coating having a homogeneous hue, articles comprising a decorative and durable coating having a homogeneous hue deposited thereon, methods for preparing a decorative and durable coating having a homogeneous hue, kits capable of producing a decorative and durable coating having a homogeneous hue, and methods for color matching using powder coating compositions.

Decorative and durable coating having a homogeneous hue, methods for their preparation, and articles coated therewith

A method of producing a coating composition containing flake-like, color effect pigment particles and polymeric binder. The pigment composition has an initial size with fine particles. Upon mixing and heating the pigment composition to a temperature to achieve a second particle size distribution, the fine particles in the initial particle size distribution are bound to the larger particles in the pigment composition. The time and temperature of bonding the pigment composition can be adjusted to account for the chemistry of the polymeric binder and the loading of the flake-like, color effect pigment.

Bonding of powder coating compositions

An extrusion process for manufacturing powder coating compositions is disclosed. The process generally includes a shear mixing step done at ambient temperature and a focused heating step in which the shear mix is heated to a higher temperature for a shorter time than in conventional methods. The focused heating provides for a shorter heat history, resulting in enhanced coating properties. The mixture may be cooled before it leaves the extruder.

Focused heat extrusion process for manufacturing powder coating compositions

A transportable container for fluidizable solids includes a storage container adapted to contain the fluidizable solids is disclosed. The storage container defines an air inlet port for introducing fluidizing air into the storage container and a solids outlet port for discharging the solids from the storage container. A solids outlet conduit may be connected to the solids outlet port for supplying the solids to a downstream process or apparatus. An agitator is provided at the bottom end of the storage container for mixing and maintaining homogeneity of the solids in the fluidizing air. A fluid permeable fluidization membrane is disposed in the storage container below the agitator. The fluidization membrane defines an air chamber below the solids for introducing the fluidizing air into the solids.

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Litchfield, OH, United States of America

Joseph M Ferencz