Flame resistant electrical insulating material
First Claim
1. A coextruded flame resistant electrically insulating multilayer material comprising a flame resistant core, said core comprised of a thermoplastic polymer selected from the group comprising polyolefins, poly(aryl ethers), polyetherimides, polyamides, poly(aryl sulfones), thermoplastic polyurethanes, alkenyl aromatic polymers, acrylic-based polymers, polycarbonates, nitrile barrier resins, thermoplastic polyester, and blends of said polymers blended with a flame retardant and an electrically insulating first thermoplastic outer layer wherein said thermoplastic core is the only flame resistant polymer in said multilayer material and wherein said flame retardant is the only flame retardant in said multilayer material.
1 Assignment
0 Petitions
Accused Products
Abstract
A flame resistant electrically insulating multilayer material is described herein, in which a flame resistant core which may be comprised of coextrudable, thermoformable thermoplastic materials has at least one electrically insulating outer layer attached thereto. Preferred polymeric materials forming the core include blends of polycarbonates with halogen-containing polycarbonates. Each outer layer typically may be formed from polycarbonates and linear polyesters. The multilayer material may be shaped to surround and shield any sensitive device requiring protection from high voltage arcing or fire.
48 Citations
30 Claims
- 1. A coextruded flame resistant electrically insulating multilayer material comprising a flame resistant core, said core comprised of a thermoplastic polymer selected from the group comprising polyolefins, poly(aryl ethers), polyetherimides, polyamides, poly(aryl sulfones), thermoplastic polyurethanes, alkenyl aromatic polymers, acrylic-based polymers, polycarbonates, nitrile barrier resins, thermoplastic polyester, and blends of said polymers blended with a flame retardant and an electrically insulating first thermoplastic outer layer wherein said thermoplastic core is the only flame resistant polymer in said multilayer material and wherein said flame retardant is the only flame retardant in said multilayer material.
- 8. A coextruded flame resistant electrically insulating multilayer material comprising a flame resistant core, said core comprised of a thermoplastic polycarbonate polymer blended with a flame retardant comprised of a copolycarbonate derived from a halogenated bisphenol -A and a dihydric phenol, and electrically insulating first and second thermoplastic outer layers attached to a first and second surface of the core, respectively, said second surface of the core opposite to said first surface and wherein the first and second thermoplastic outer layers are polyesters and wherein said thermoplastic core is the only flame resistant polymer in said multilayer material and wherein said flame retardant is the only flame retardant in said multilayer material.
-
11. A coextrudable and thermoformable multilayer material exhibiting flame resistance and electrical insulative capability, comprising
a flame resistant core formed from an aromatic polycarbonate blended with a copolycarbonate derived from a halogenated bisphenol-A and a dihydric phenol, and first and second outer layers attached to first and second surfaces of the core, respectively, said outer layers formed from polymers or copolymers selected from the group consisting of polyesters and polycarbonates.
- 14. A coextruded flame retardant electrically insulating multilayer material comprising a flame retardant core, said core comprised of a polycarbonate blended with a halogenated copolycarbonate, and an electrically insulating first thermoplastic outer layer comprised of polymers or copolymers selected from the group consisting of polyesters and polycarbonates, wherein said core is the only flame resistant polymer in said multilayer material and wherein said halogenated copolycarbonate is the only flame retardant in said multilayer material.
- 29. A coextruded flame resistant electrically insulating multilayer material comprising a flame resistant core, said core comprised of a thermoplastic polymer selected from the group consisting of polyolefins, poly(aryl ethers), polyether imides, polyamides, poly(aryl sulfones), polyurethanes, alkenyl aromatic polymers, acrylic-based polymers, polycarbonates, nitrile barrier resins, and copolymers, mixtures and blends of the foregoing, blended with a flame retardant, and an electrically insulating first thermoplastic outer layer selected from the group consisting of polyesters, polycarbonates, polyphthalate carbonates, copolyestercarbonates and copolymers, mixtures and blends of the foregoing, wherein said thermoplastic core is the only flame resistant polymer in said multilayer material and wherein said flame retardant is the only flame retardant in said multilayer material.
Specification