Thermally conductive electrically insulating compositions and structures and devices comprising such materials. In various embodiments, such materials comprise liquid crystal polymer and fillers, wherein the fillers comprise boron nitride and glass fiber. In various embodiments, the liquid crystal polymer is selected from the group consisting of semi-aromatic copolyesters, copolyamides, polyester-co-amides, and mixtures thereof.

Thermoplastic molding compositions containing A) from 29 to 99.99% by weight of a polyester, B) from 0.01 to 10% by weight of an ionomer composed of at least one copolymer of B.sub.1) from 30 to 99.9% by weight of ethylene B.sub.2) from 0 to 60% by weight of 1-octene or 1-butene or propylene or a mixture of these and B.sub.3) from 0.01 to 70% by weight of functional monomers, where the functional monomers are selected from the group of the carboxylic acid groups, carboxylic anhydride groups, carboxylic ester groups and mixtures of these, where component B) has been neutralized to an extent of at least 20% with alkali metal ions, based on 100% by weight of A) and B), and C) from 0 to 70% by weight of other additional substances, where the sum of the % by weight values for A) to C) is 100%, for use in the production of cable sheathing or optical-conductor sheathing via blow molding, profile extrusion, and/or pipe extrusion.

A polymer composition for use in an electric circuit protection device is provided. The polymer composition comprises a polymer matrix that includes a thermotropic liquid crystalline polymer. The polymer composition exhibits an in-plane thermal conductivity of about 3.5 W/m-K or more as determined in accordance with ASTM E1461-13 and a melt viscosity of from about 1 to about 100 Pa-s as determined in accordance with ISO Test No. 11443:2014 at a temperature 15° C. higher than the melting temperature.

The disclosed concept pertains to thermoplastic based materials, e.g., thermoplastic based composites, that are suitable replacements for known thermoset based materials, e.g., unsaturated polyesters, as insulators for circuit protection in electrical contact/non-contact applications, such as, but not limited to, housings, casings, enclosures, encapsulated or over-molded parts. In certain embodiments, the thermoplastic based materials house miniature circuit breakers, and arc and ground fault circuit breakers.

The invention provides a resin molded article containing a wholly aromatic liquid crystalline polyester resin and formed by being subjected to heat treatment, in which the enthalpy change Δ H.sub.1 at the melting point of the first cycle and the enthalpy change Δ H.sub.2 at the melting point of the second cycle of the temperature elevation process measured by a differential scanning calorimeter satisfy Δ H.sub.1/Δ H.sub.2≥2.0, and the dielectric loss tangent measured by the split-post dielectric resonator (SPDR) method at a measurement frequency of 10 GHz is 0.85×10.sup.−3 or less.

The present invention provides an FFC using a PCT film as an insulating coating layer. The FFC comprises a lower insulating coating layer made of the PCT film; a lower adhesive layer made of polyester formed through a lower primer layer made of polyurethane material on the upper surface of the lower insulating coating layer; an upper insulating coating layer made of the PCT film; an upper adhesive layer made of polyester formed through an upper primer layer made of polyurethane material on a lower surface of the upper insulating coating layer; and a conductor wire layer interposed between the lower adhesive layer and the upper adhesive layer.

There is provided an insulating material including a composite resin material comprising an organic resin and minute particles containing a metal element. The organic resin includes a resin material including polyester as a main backbone thereof and having an alkoxy group. The minute particles have an average particle size of greater than or equal to 0.5 nm but less than or equal to 50 nm. Such an insulating material is used as an insulating layer of a wiring member (wiring board, covered electric wire, etc.) including a conductor and the insulating layer which covers the conductor.

The present disclosure relates to insulation. Teachings thereof may be embodied in a solid insulation material, especially in tape form, the use thereof in a vacuum impregnation process and to an insulation system produced therewith, and also an electrical machine comprising the insulation system, especially for the medium- and high-voltage sector, namely for medium- and high-voltage machines, especially rotating electrical machines in the medium- and high-voltage sector, and to semifinished products for electrical switchgear. For example a solid insulation material with an anhydride-free impregnating agent may include: a carrier; a barrier material; a curing catalyst; and a tape adhesive. The curing catalyst and the tape adhesive are inert toward one another but react under the conditions of a vacuum impregnation process if combined with an anhydride-free impregnating agent having gelation times of 1 h to 15 h at impregnation temperature. The tape adhesive is free of oxirane groups and includes at least two free hydroxyl groups.

Polymeric compositions comprising a polybutylene terephthalate; a low-density polyolefin selected from a low-density polyethylene, a polyolefin elastomer, or combinations thereof; and a maleated ethylene-based polymer. Optical cable components fabricated from the polymeric composition. Optionally, the polymeric composition can further comprise one or more additives, such as a filler. The optical fiber cable components can be selected from buffer tubes, core tubes, and slotted core tubes, among others.

A liquid crystal polyester resin composition includes a liquid crystal polyester (A) including repeating units represented by formulae (I) to (III), ##STR00001##
a liquid crystal polyester (B) including repeating units represented by formulae (IV) and (V), ##STR00002##
and surface-treated glass fibers (C) including an epoxy resin on the surface thereof, wherein the mass ratio of (A) to (B) [A/B] is from 90/10 to 45/55, the content of (C) is from 10 to 130 parts by mass relative to 100 parts by mass of the total amount of (A) and (B), and as measured in a bending test using a strip-like molded article (length: 127 mm, width: 12.7 mm, thickness: 0.5 mm), the bending strength and the bending elastic modulus of the liquid crystal polyester resin composition are equal to or more than 330 MPa and equal to or more than 20 GPa, respectively.