Ticona Gmbh

Bing Lu

Xinyu Zhao

Rong Luo

Steven Daniel Gray

Robert Alan Deck

Yuehua Yu

A polymer composition that contains a polyaryletherketone and a plurality of reinforcing fibers is provided. The reinforcing fibers have an aspect ratio of from about 1.5 to about 10, which is defined as the cross-sectional width of the fibers divided by the cross-sectional thickness of the fibers.

Polyaryletherketone composition

A polymer composition that contains a polyaryletherketone and thermotropic liquid crystalline polymer, which are melt processed in the presence of a flow modifier. The flow modifier is a functional compound that contains one or more hydroxyl functional groups.

High flow polyaryletherketone composition

Polymer compositions are described that are well suited for producing reflectors for light-emitting devices, such as light-emitting diodes. In one particular embodiment, the polymer composition contains a polymer resin, a white pigment, a silicone compound, and a nucleating agent. The polymer resin may comprise, for instance, a poly(1,4-cyclohexanedimethanol terephthalate). In accordance with the present disclosure, the composition also contains at least one silicone compound and at least one nucleating agent. The silicone compound and nucleating agent have been found to improve the molding processability and reflectance stability of the polymer composition.

Molded reflectors for light-emitting diode assemblies

Polymer compositions are described containing a poly(1,4-cyclohexanedimethanol terephthalate) polymer in combination with a white pigment and optionally one or more reinforcing fillers. In accordance with the present disclosure, the composition also contains one or more reactive viscosity stabilizers. In order to prevent against yellowing, the composition is free of various aromatic epoxy resins, such as novolac epoxy resins. The polymer composition has excellent reflectance properties making the composition well suited for producing reflectors for light sources, such as LED assemblies.

Polymer compositions are described containing a thermoplastic polymer in combination with one or more components, such as a white pigment and optionally one or more reinforcing fillers. In one embodiment, the polymer composition can be formulated to have high reflective properties. In other embodiments, the polymer composition can be formulated so as to have desired melt flow characteristics. In still another embodiment, the polymer composition can be formulated so as to have desired mechanical properties, such as impact resistance.

Polymer composition for producing articles with light reflective properties

Polymer compositions are described containing a white pigment for increasing the reflectance properties of the resulting material. In this regard, the material is well suited for being used as a reflector, such as a reflector for light-emitting diode assemblies. In accordance with the present disclosure, the white pigment comprises chalk resistance particles. The particles can also display a basic pH when placed in distilled water.

Reflectors for light-emitting diode assemblies containing a white pigment

Polymer compositions are described that are well suited for producing reflectors for light-emitting devices, such as light-emitting diodes. In one embodiment, the polymer composition contains a polymer resin and a stabilizer comprising a phosphonate compound and/or a phosphate compound and optionally a white pigment. The polymer resin may comprise, for instance, a poly(1,4-cyclohexanedimethanol terephthalate). The phosphate stabilizer has been found to significantly improve the stability of the polymer composition without interfering with the ability of the composition to bond to other polymer materials, such as silicone resins. Silicone resins, for instance, are typically used as an encapsulant for light-emitting diode assemblies.

Reflector for light-emitting devices

A multi-stage process for forming a liquid crystalline polymer is provided. More particularly, the process includes acetylating one or more precursor monomers and melt-polymerizing the acetylated monomers to form a prepolymer in the form of a solid particulate material. Thereafter, the prepolymer is solid-state polymerized in a fluidized bed reactor that contains a porous surface (e.g., bed, plate, grate, etc.) on which the prepolymer is supported. While supported by this porous surface, the prepolymer can become 'fluidized' with a heated stream of a gas (e.g., nitrogen). In this manner, a sufficient degree of turbulence is created to distribute heat evenly around the prepolymer and cause it to rapidly reach the target reaction temperature.

Solid-stage polymerization system for a liquid crystalline polymer

The present disclosure is directed to a molded reflective structure for a light source, which may be a light-emitting diode ('LED'). The structure includes a reflector which defines a cavity therein. The cavity is surrounded by at least one reflective side wall, and has a greatest dimension of less than about 50 mm. The at least one reflective side wall further has an initial reflectance at 460 nm of greater than about 85% and an initial whiteness index of greater than about 80. The reflector is made from a thermoplastic polymer composition that contains a material such that the at least one reflective side wall absorbs light in the ultraviolet and violet region of the electromagnetic spectrum and re-emits light in the blue region.

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Union, KY, United States of America

Bing Lu