摘要:
Compositions comprising a polyolefin polymer and an expanded graphite exhibit uniform conductivity over a broad range of temperature. In one embodiment, the polyolefin polymer is polypropylene or polyethylene homopolymer or a polypropylene or polyethylene copolymer. The compositions provide uniform conductivity and can be used as a conductive formulation for medium and high voltage cable components.
摘要:
Compositions comprising a polyolefin polymer and an expanded graphite exhibit uniform conductivity over a broad range of temperature. In one embodiment, the polyolefin polymer is polypropylene or polyethylene homopolymer or a polypropylene or polyethylene copolymer. The compositions provide uniform conductivity and can be used as a conductive formulation for medium and high voltage cable components.
摘要:
The polymer composition is a flame retardant composition comprising an organic polymer and nanographene. Suitable organic polymers include polymers such as polyolefins and polyvinyl chloride. Preferably, the nanographene should have an aspect ratio greater than equal to about 1000:1, should have a surface area greater than or equal to about 100 m2/gram nitrogen surface absorption area, and be expanded.
摘要:
The present invention is a cable having (a) one or more electrical conductors or a core of one or more electrical conductors and (b) each conductor or core being surrounded by a layer of insulation. The insulation layer is prepared from a composition comprising a polyolefin and a 3-dimensional, cage-structured nanoparticle. The preferred polyolefins are polyethylene polymers, and the preferred nanoparticles are polyhedral oligomeric silsesquioxanes (POSS), polyhedral oligomeric silicates (POS), or polyhedral oligomeric siloxanes.
摘要:
The present disclosure provides a dielectric fluid composed of a genetically engineered microbial oil (GEMO) and an antioxidant. The GEMO includes a triglyceride and an amount of small glyceride. The amount of small glyceride is within a range from 0.1 wt % to 30 wt %, based upon the GEMO weight.
摘要:
The method of manufacturing a natural ester, oil-based electrical insulation fluid by contacting refined, bleached, optionally winterized, and deodorized natural ester oil, e.g., soy oil, with an absorbent is improved by using as the absorbent a synthetic silicate absorbent comprising an alkali and/or alkaline earth metal, e.g., magnesium.
摘要:
The disclosure is directed to a thermally-stable dielectric fluid. The dielectric fluid includes (a) an oil, (b) a substituted, hindered phenolic antioxidant having at least two substituted cresol groups being covalently bonded to each other through a methylene bridge, and (c) a substituted, diphenyl amine antioxidant having at least two substituted phenyl groups being covalently bonded to each other through an amine bridge.
摘要:
Strippable semiconductive shields comprise a composition comprising in weight percent (wt %) based on the weight of the composition: (A) 20 to 80% of an interpolymer of an olefin and an α,β-unsaturated carbonyl comonomer, (B) 1 to 90% chlorinated polyolefin, (C) 20 to 45% carbon black, (D) 0.1 to 5% antioxidant, (E) 0.01 to 5% acid scavenger stabilizer; (F) Optionally free radical initiator, (G) Optionally silane functionality, (H) Optionally a sulfur-containing curative, and (I) Optionally a radiation-cure catalyst.
摘要:
Plasticizers are made from oil with a narrowed, fatty acid polydispersity and extracted from a microorganism, such as a natural or genetically modified bacterium or algae. These plasticizers can comprise either a large content of either saturated C4 and/or C6 triglycerides or unsaturated C12 or greater triglycerides that have been chemically modified by one or more of epoxidation, acylation and esterification. The plasticizers of this invention are particularly well-suited for use with polar polymeric resins such as PVC.
摘要:
A cable comprising one or more electrical conductors or communications media or a core of two or more electrical conductors or communications media, each electrical conductor, communications medium, or core being surrounded by a layer comprising:(a) polyethylene; polypropylene; or mixtures thereof;(b) carbon nanotubes;(c) a conductive carbon black other than carbon nanotubes; and(d) optionally, a copolymer of acrylonitrile and butadiene wherein the acrylonitrile is present in an amount of about 30 to about 60 percent by weight based on the weight of the copolymer or a silicone rubber.