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US 10,294,367 B2Granted
Electrical tracking resistance compositions, articles formed therefrom, and methods of manufacture thereof
AssigneeSabic Global Technologies B.V.
InventorsHariharan Ramalingam, Gaurav Mediratta, Kapil Chandrakant Sheth
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Abstract
A composition comprises, based on the total weight of the composition, 45 wt % to 75 wt % of a polyetherimide; and 20 wt % to 45 wt % of talc; and 5 wt % to 15 wt % of a fluorinated polymer; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops according to ASTM D-3638-85.
Claims12
A composition comprising, based on the total weight of the composition,
- 45 wt % to 75 wt % of a polyetherimide;
- greater than 20 wt % to 45 wt % of talc having a D95 of 2 microns to 6 microns determined by sedigraph analysis using a Micrometritics Sedigraph 5120 particle size analysis system;
- and
- greater than 5 wt % to 15 wt % of polytetrafluoroethylene;
- wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops according to ASTM D-3638-85,
- wherein the polyetherimide comprises units of the formula
- wherein R is m-phenylene, p-phenylene, or a combination thereof, and T is the group of the formula —O—Z—O—, wherein Z is a divalent group of the formula
- Q being isopropylidene.
5 more elements
A composition comprising, based on the total weight of the composition,
- 45 wt % to 55 wt % of a polyetherimide sulfone;
- 35 wt % to 45 wt % of talc having a D95 of 2 microns to 6 microns determined by sedigraph analysis using a Micrometritics Sedigraph 5120 particle size analysis system;
- and
- 8 wt % to 15 wt % of polytetrafluoroethylene;
- wherein the composition has:
- a number of drops to tracking at 250 volts of greater than or equal to 50 drops according to ASTM D-3638-85;
- and
- a tracking voltage of greater than or equal to 300 volts according to ASTM D-3638-85,
- wherein the polyetherimide sulfone comprises units of the formula
- wherein
- R is a divalent group of the formula
- wherein Q1 is —SO2—, and
- T is the group of the formula —O—Z—O—, wherein Z is a divalent group of the formula
- Q being isopropylidene.
11 more elements
Dependencies are inferred from the claim text.