Disclosed herein is a polyamide composition, comprising including from 30 wt % to 70 wt % of polyamide mixture and from 30 wt % to 70 wt % of filler mixture, and from 0 to 10 wt % of additives (E), based on the total weight of the polyamide composition. The polyamide composition provides advantage of good flatness and less dust particles, meanwhile the mechanical properties are maintained. Such advantage makes the polyamide composition especially suitable for the optical element application.

The present invention relates to composites comprising rigid-rod polymers and graphene nanoparticles, processes for the preparation thereof, nanocomposite films and fibers comprising such composites and articles containing such nanocomposite films and fibers.

The present invention relates to composites comprising rigid-rod polymers and graphene nanoparticles, processes for the preparation thereof, nanocomposite films and fibers comprising such composites and articles containing such nanocomposite films and fibers.

The present invention relates to composites comprising rigid-rod polymers and graphene nanoparticles, processes for the preparation thereof, nanocomposite films and fibers comprising such composites and articles containing such nanocomposite films and fibers.

Nanocomposite anticorrosion coating can be achieved by depositing alternating, multilayers of a cross-linkable polymer and dispersed and aligned inorganic platelets followed by cross-linking of the cross-linkable polymer. The cross-linkable polymer can be an externally cross-linkable polymer that is cross-linked by diffusing a cross-linking agent into the deposited multilayer coating. Alternately, the cross-linkable polymer can be a functionalized cross-linkable polymer that is cross-linked by self-curing, thermal heat curing, or light (e.g., UV) following deposition of the multilayer coating.

A coated article that demonstrates a sparkle effect and vibrant color over an expanded range of color space is described. A first coating of at least one fluoroolefin and at least one pigment is applied to a substrate, followed by a second coating of at least one fluoroolefin and at least one effect additive. The effect additive is glass flake designed to provide a sparkle effect. The cured film may be provided in a wide range of colors warrantied similar to conventional coatings. A method of making these coated articles is also provided.

A coated article that demonstrates a sparkle effect and vibrant color over an expanded range of color space is described. A first coating of at least one fluoroolefin and at least one pigment is applied to a substrate, followed by a second coating of at least one fluoroolefin and at least one effect additive. The effect additive is glass flake designed to provide a sparkle effect. The cured film may be provided in a wide range of colors warrantied similar to conventional coatings. A method of making these coated articles is also provided.

A method of preparing a thermally conductive composite including: a) mixing 15% to 60% by weight of a polymer matrix with 0% to 85% by weight of a high-aspect-ratio thermally conductive filler having an aspect ratio of at least 5:1; and (b) mixing a polymer melt obtained from step (a) with 0% to 85% by weight of a low-aspect-ratio thermally conductive filler having an aspect ratio of 2:1 or less. By changing the weight ratio, the structure and mechanical properties of the low-aspect-ratio thermally conductive filler and the high-aspect-ratio thermally conductive filler, thermal conductivity anisotropy can be tuned. A thermally conductive composite having thermal conductivity anisotropy in the range from 1 to 4 is also disclosed.

A method of preparing a thermally conductive composite including: a) mixing 15% to 60% by weight of a polymer matrix with 0% to 85% by weight of a high-aspect-ratio thermally conductive filler having an aspect ratio of at least 5:1; and (b) mixing a polymer melt obtained from step (a) with 0% to 85% by weight of a low-aspect-ratio thermally conductive filler having an aspect ratio of 2:1 or less. By changing the weight ratio, the structure and mechanical properties of the low-aspect-ratio thermally conductive filler and the high-aspect-ratio thermally conductive filler, thermal conductivity anisotropy can be tuned. A thermally conductive composite having thermal conductivity anisotropy in the range from 1 to 4 is also disclosed.

A flowable, (e.g., screen printable, stencil printable and/or dispensable) thermally conductive paste is disclosed and provide low temperature curing or firing. The pastes are useful in forming thermally conductive pathways for electronic type applications, such as, providing thermal conduction between a semiconductor chip and its associate semiconductor chip packaging (e.g. power electronic applications), which can be useful in power converters, electrical power steering modules, car head lights (LEDs), solar cells, printed circuit boards (PCBs), plasma display panels (PDPs), and the like. The pastes have a combination of conductive flakes and particles in a minimal amount of carrier fluid and carrier resin to provide advantageous deposition and heat melding properties.