Granted Patent B2

US 12,312,454 · App. 17/469,245 · Granted May 27, 2025

Inventors: Matthew Paul James (Swindon, GB); Ladislaus Kehl (Ottobrunn, DE); David Francis Pearce (Swindon, GB)

Assignees: Tyco Electronics UK Ltd.; Tyco Electronics Raychem GmbH

C08K3/04C08K3/22C08K5/375C08L23/16H01B3/28C08K2003/2241C08K2201/001C08K2201/002C08K2201/014

Abstract

Claims (35)

1. An elastomeric material compound for providing electrical stress control, comprising:

up to about 50 volume percent selected from a group of ethylene, propylene, and diene monomer rubber;

up to about 10 volume percent of low structured carbon black;

0.5 to about 3 volume percent of high structured carbon black;

up to about 1 volume percent sterically hindered primary phenolic antioxidant stabilizer;

up to about 2 volume percent polymeric extrusion process aid;

up to about 1 volume percent hindered thiophenol antioxidant stabilizer; and

up to about 30 volume percent inorganic filler.

2. The elastomeric material compound of claim 1 , wherein the inorganic filler comprises barium titanate.

3. The elastomeric material compound of claim 1 , wherein the inorganic filler comprises titanium dioxide.

4. The elastomeric material compound of claim 1 , wherein the elastomeric material compound comprises thiophenol as a functional additive.

5. The elastomeric material compound of claim 1 , further comprising Zinc Stearate.

6. The elastomeric material compound of claim 1 , wherein an elastomeric material dissipation factor of the elastomeric material compound is less than 0.1 in 50 Hz to 60 Hz AC dielectric fields up to 2 kV/mm.

7. The elastomeric material compound of claim 1 , wherein an elastomeric material dissipation factor of the elastomeric material compound is less than 0.1 at frequencies from 1 Hz to 10 MHz.

8. An elastomeric material compound for providing electrical stress control, comprising:

up to about 50 volume percent selected from a group of ethylene, propylene, and diene monomer rubber;

up to about 2 volume percent Epichlorohydrin rubber;

up to about 45 volume percent of low structured carbon black;

0.5 to about 5 volume percent of high structured carbon black;

up to about 1 volume percent sterically hindered primary phenolic antioxidant stabilizer;

up to about 2 volume percent Zinc-Stearate; and

up to about 1 volume percent hindered thiophenol antioxidant stabilizer.

9. The article of claim 8 , wherein the elastomeric material compound comprises thiophenol as a functional additive.

10. The article of claim 8 , wherein the elastomeric material compound comprises has a relative permittivity greater than 15.

11. An elastomeric material compound for providing electrical stress control, comprising:

up to about 20 volume percent selected from a group of ethylene, propylene, and diene monomer rubber;

up to about 20 volume percent of low structured carbon black;

0.5 to about 2 volume percent of high structured carbon black;

up to about 1 volume percent sterically hindered primary phenolic antioxidant stabilizer;

up to about 1 volume percent Zinc-Stearate;

up to about 1 volume percent hindered thiophenol antioxidant stabilizer; and

up to about 60 volume percent inorganic filler.

12. The elastomeric material compound of claim 11 , wherein the inorganic filler comprises barium titanate.

13. The elastomeric material compound of claim 11 , wherein the inorganic filler comprises titanium dioxide.

14. The elastomeric material compound of claim 11 , wherein the elastomeric material compound comprises thiophenol as a functional additive.

Assignments (3)

Priority Claims (1)

Continuity (2)

References Cited (27)