摘要:
Cables including a fire-retardant composition are disclosed. The fire-retardant compositions include an oxygen-containing base polymer, a primary filler, and an antimony-containing secondary filler. The primary filler can be a metal hydroxide. The fire-retardant composition can be halogen- free and exhibit an elongation at break of about 150% or more. The cable passes the UL 1581 VW-1 flame.
摘要:
The present invention concerns a cable comprising an elongated conducting element and a self-healing material surrounding said elongated conducting element, characterized in that the self-healing material is a cross-linked material obtained from a polymeric composition comprising: A. a polymer matrix comprising at least one olefin polymer with hydrophilic moiety, and B. at least one amphiphilic compound, as self-healing additive.
摘要:
The present invention relates to a polymer composition comprising (a) a polymer portion, and (b) at least one silanol condensation catalyst, wherein each catalyst is selected from: i) a compound of formula (I): ArSO 3 H or a precursor thereof, wherein Ar is an 1 to 4 alkyl groups substituted aryl, wherein the aryl is phenyl or naphthyl, and wherein each alkyl group, independently, is a linear or branched alkyl with 10 to 30 carbons, wherein the total number of carbons in the alkyl groups is in the range of 20 to 80 carbons; ii) a derivative of i) selected from the group consisting of an anhydride, an ester, an acetylate, an epoxy blocked ester and an amine salt thereof which is hydrolysable to the corresponding compound of formula (I); and iii) a metal salt of i) wherein the metal ion is selected from the group consisting of copper, aluminum, tin and zinc, wherein the polymer portion comprises (a1) a non-polar polymer component in an amount of 0 to 90% by weight, and (a2) a polar component, in an amount of at least 10% by weight, which polar component contains 3 to 30% by weight of a polar comonomer; an article, for example, a coating, a wire or a cable, comprising the polymer composition, a process for producing an article and use of the polymer composition.
摘要:
The invention relates to semiconducting shield compositions for electric power cables having a base polymer system, nano-talc, and carbon black. The invention also relates to such semiconducting shield compositions and the use of these semiconducting shield compositions to manufacture semiconductive shields for use in electric cables, electric cables made from these compositions and methods of making electric cables from these semiconducting shield compositions. The semiconducting shield compositions of the invention may be used as strippable "semiconducting" dielectric shields (also referred to as the core shields, dielectric screen and core screen materials) in power cables with cross linked polymeric insulation, primarily with medium voltage cables having a voltage from about 5 kV up to about 100 kV, preferably up to about 35 kV.
摘要:
The present invention relates to a flame retardant polymer composition comprising an ethylene copolymer comprising polar groups selected from the group consisting of acrylic acids, methacrylic acids, acrylates, methacrylates, acetates and vinyl acetates; a single site catalyst prepared ethylene copolymer having a density between 0.860 and 0.910 g/cm 3 ; a halogen-free mineral filler comprising a huntite and/or a hydromagnesite and a maleic anhydride modified ethylene homo- or copolymer (D). The present invention relates to a wire or cable comprising said flame retardant polymer composition, and to the use of said composition for the production of a layer, preferably a jacketing layer of a wire or cable.
摘要:
The invention is directed to a silane crosslinkable polymer composition which comprises a polyolefin (a) bearing hydrolysable silane group(s) containing units. The polymer composition is suitable for producing crosslinkable articles, preferably one or more layers of a cable. The formed article, preferably a cable, is preferably crosslinked before the enduse thereof.
摘要:
A material of high dielectric constant is provided, which is comprised of partially sintered porous ceramic impregnated with polymer, for use in electronic integrated circuit applications.
摘要:
Invention is a halogen free flame retardant for a cable covering material used to form a covering layer of cable for power transmission, control and communication comprising base resin including linear low density polyethylene (LLDPE), ethylene-vinylacetate (EVA); and aluminium (III) hydroxide (ATH) as a primary flame-retardant.