Polyone Corporation

Geon Performance Solutions, LLC

United States of America As Represented by the Administrator of Nasa

The United States Government As Represented by the Administrator of the National Aeronautics and Space Administration

Ling Hu

Roger W Avakian

Sang Lee

Chun-Hua K Chuang

Craig L Shoemaker

Robert Schilling

Chun-Hua Chuang

A polyvinyl halide compound has thermal conductivity and includes polyvinyl halide resin, natural or synthetic graphite of flake or spheroid form, and at least 0.5 weight percent of epoxidized vegetable oil. Selection of types and amounts of graphite and epoxidized vegetable oil provide thermal conductivity while other desirable properties of the compound are suitably maintained. The compound can be used for making any end use article that needs flame retardance and good thermal management and is especially useful as a thermally conductive material to replace die cast or extruded aluminum heat sinks in industrial applications, such as LED lighting fixtures.

Thermally conductive polyvinyl halide

A polyvinyl halide compound, alone or alloyed with thermoplastic polyurethane, is used as a flexible layer for over-molding a rigid polymer substrate. Selection of types and amounts of calcium carbonate for the overmolding layer improves peel strength to achieve cohesive failure of the flexible overmolding layer rather than adhesive failure of the interface between the flexible overmolding layer and the rigid polymer substrate.

Flexible polyvinyl halide used for injection over-molding

Novel aromatic polyimides are disclosed with sufficient physical properties to be useful in 3D printing.

Aromatic polyimides suitable for 3D printing processes

A method and system for oxygen molecule scavenging is disclosed. The system employs as a novel copolymer as the reducing agent for oxygen molecules. The copolymer is the polymerization product of cyclic aliphatic monomer and unsaturated functional polymer.

Oxygen scavenging copolymers made from cyclic aliphatic monomers

Reactive extrusion can be used in a continuous, solvent-less preparation of imide oligomers involving two competing reactions among three ingredients, the first reaction between a dianhydride and a diamine and the second reaction between an endcap and the same diamine. The imide oligomer can form a composite via conventional production methods or via formation of a film from imide oligomer re-melted in an extruder before being impregnated into tape or fabric.

Preparation of imide oligomers via concurrent reactive extrusion

A flame retardant polycarbonate compound is disclosed. The compound comprises a polycarbonate and non-halogenated polyphosphazene as a flame retardant, along with talc, polytetrafluoroethylene, and optionally, a potassium salt of perfluorobutane sulfonic acid. The compound can achieve a UL 94 rating of V-0 at two different thicknesses of less than 1 mm.

Non-halogenated flame retardant polycarbonate compounds

A crosslinkable bioplasticizer is disclosed, a mixture of an epoxy-functional bio-derived plasticizer and an aromatic dianhydride. When heated, the mixture crosslinks, which can be accelerated by the addition of a Lewis Acid metal catalyst. The crosslinked bioplasticizer can be melt compounded into a thermoplastic resin or can be formed in situ in the thermoplastic resin. The crosslinking of the bioplasticizer can reduce blooming of the bioplasticizer to the surface of a plastic article made by extrusion, molding, calendering, or thermoforming techniques.

Crosslinkable bioplasticizers

A method and system for oxygen molecule scavenging is disclosed. The system employs as a novel terpolymer as the reducing agent for oxygen molecules. The terpolymer is the polymerization product of macrocyclic poly(alkylene dicarboxylate) oligomer, unsaturated functional polymer, and epoxy-functional styrene-acrylate oligomer.

Growing community of inventors

Westlake, OH, United States of America

Ling Hu