Abstract:
In various aspects, the disclosure relates to thermally conductive thermoplastic compositions comprising a polymer matrix, an impact modifier composition having a chemically reactive impact modifier, and, optionally, a chemically non-reactive impact modifier, and a thermally conductive filler. The disclosed thermally conductive thermoplastic compositions exhibit good thermal conductivity and improved impact and ductile properties.
Abstract:
Disclosed herein are methods and compositions of blended polyamide compositions with improved thermal conductivity. The resulting blended polymer compositions, comprising one or more polyamide polymers, one or more thermally conductive fillers, and a laser direct structuring additive, wherein the blended polymer composition has improved thermal conductivity.
Abstract:
Disclosed herein are thermally conductive blended polycarbonate compositions with improved flame retardant properties. The resulting compositions, comprising a polycarbonate polymer, a phosphorus-containing flame retardant, a metal hydroxide, optionally an anti-dripping agent, and optionally a silicone-containing char-forming agent, can be used in the manufacture of articles requiring thermally conductive materials with improved flame retardant properties such as electronic devices. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
Abstract:
Thermally conductive compositions include from about 20 wt. % to about 80 wt. % of a polycarbonate polymer, from about 0.5 wt. % to about 30 wt. % of an impact modifier, and a thermal conductivity modifier. The thermal conductivity modifier includes from about 0.5 wt. % to about 10 wt. % of a high density polyethylene polymer, from about 0.5 wt. % to about 10 wt. % of a maleic anhydride type copolymer, or from about 0.01 wt. % to about 10 wt. % of an acid component. In some aspects the thermally conductive compositions have a notched Izod impact strength of at least about 30 J/m, a through-plane thermal conductivity of at least about 0.4 W/mK and/or an in-plane thermal conductivity of at least about 1.0 W/mK. Methods for making the compositions and articles formed according to the methods are also described.
Abstract:
Disclosed herein are thermally conductive blended polycarbonate compositions with improved flame retardant properties. The resulting compositions, comprising a polycarbonate polymer, a phosphorus-containing flame retardant, a metal hydroxide, optionally an anti-dripping agent, and optionally a silicone-containing char-forming agent, can be used in the manufacture of articles requiring thermally conductive materials with improved flame retardant properties such as electronic devices. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
Abstract:
Polymer resin compositions include a thermally conductive filler and one or more of a white pigment or an optical brightening agent. In a particular aspect a polymer composition includes: from about 20 wt. % to about 80 wt. % of a polymer base resin; from about 1 wt. % to about 70 wt. % of a thermally conductive filler; from about 0.1 wt. % to about 50 wt. % of a white pigment; and from about 0.001 wt. % to about 10 wt. % of an optical brightening agent. In certain aspects the polymer composition exhibits a through plane thermal conductivity of at least about 0.3 W/mK and a reflectivity of at least about 80%. In further aspects the polymer composition exhibits a through plane thermal conductivity of at least about 0.3 W/mK and a reflectivity of at least about 90%.
Abstract:
The invention concerns compositions comprising (a) from about 20 wt % to about 80 wt % of a polymer component; (b) from about 10 wt % to about 70 wt % of a flame retardant component; and (c) from about 0.01 wt % to about 5 wt % of an acid component; wherein the combined weight percent value of all components does not exceed 100 wt %; wherein all weight percent values are based on the total weight of the composition; and wherein the composition has: (i) a thermal conductivity of at least about 1.5 W/mK for through plane thermal conductivity; (ii) flame retardancy of at least VI at 0.8 mm using the UL94 test standard; and (iii) melt volume flow rate of at least 10 g/cm3 using ASTM D 1238.
Abstract:
Disclosed herein is a composition comprising 20 to 80 wt % of an organic polymer; 0.1 to 30 wt % of flame retardant that comprises a phosphorus containing flame retardant and/or a nitrogen containing flame retardant; and 0.1 to 50 wt % of calcium sulfate. Disclosed herein is a method comprising blending 20 to 80 wt % of an organic polymer; 0.1 to 30 wt % of flame retardant package that comprises a phosphorus flame retardant and/or a nitrogen flame retardant; 0.1 to 50 wt % of calcium sulfate; and molding the composition.