摘要:
An electron-beam cured poly(arylene ether) composition exhibits an excellent balance of flexibility, chemical resistance, and resistivity per unit volume. The chemical resistance of the composition is substantially improved by electron beam curing. The electron-beam cured poly(arylene ether) composition is useful for the fabrication of extruded articles, including insulation for automotive wire and cable.
摘要:
Disclosed herein is covered conductors with a normal to large conductor cross-section area (AWG 5 to AWG 24). The thickness of the coating can be, for example, 0.25 to 8.0 millimeter (mm). Also disclosed are a thermoplastic composition comprising a poly(arylene ether) having an intrinsic viscosity greater than 0.25 dl/g as measured in chloroform at 25° C., a styrenic resin, a polyolefin resin, and optionally a flame retardant, a compatibilizer, or a combination of a flame retardant and a compatibilizer. The coating comprises the thermoplastic composition described above.
摘要:
Disclosed herein is covered conductors with a normal to large conductor cross-section area (AWG 5 to AWG 24). The thickness of the coating can be, for example, 0.25 to 8.0 millimeter (mm). Also disclosed are a thermoplastic composition comprising a poly(arylene ether) having an intrinsic viscosity greater than 0.25 dl/g as measured in chloroform at 25° C., a styrenic resin, a polyolefin resin, and optionally a flame retardant, a compatibilizer, or a combination of a flame retardant and a compatibilizer. The coating comprises the thermoplastic composition described above.
摘要:
A covered conductor comprising: a conductor; and a covering comprising a thermoplastic composition and the thermoplastic composition comprises: a poly(arylene ether) having an intrinsic viscosity greater than 0.25 dl/g as measured in chloroform at 25° C., a poly(alkenyl aromatic)polymer, a polyolefin resin and optionally a flame retardant and a compatibilizer, wherein the covered conductor essentially meets the performance requirement of ISO 6722, wherein the covering is disposed over the conductor, wherein the conductor has a cross section that meets as least one of following: (i) American Wire Gauge (AWG) from AWG 56 to AWG 26, (ii) a cross-section area from 0.000122 to 0.128 mm2 (corresponding to AWG 56 to AWG 26 according to ASTM B256-02); (iii) a nominal diameter from 0.0124 to 0.404 mm (corresponding to AWG 56 to AWG 26 according to UL 1581, 4th edition, Table 20.1). The covering of the covered conductor has a thickness from about 0.010 to about 0.85 mm. An automotive wire harness assembly comprises the covered conductor. An “end use equipment” comprises the wire assembly.
摘要:
A composition is prepared by oxidative copolymerization of specific amounts of 2,6-dimethylphenol, 2,3,6-trimethylphenol, and a hydroxyaryl-terminated polysiloxane. The composition exhibits an increased heat resistance relative to a corresponding composition prepared by copolymerizing 2,6-dimethylphenol and hydroxyaryl-terminated polysiloxane, without 2,3,6-trimethylphenol. The composition is useful as a flame-retardant additive in polymer compositions that require high heat resistance.
摘要:
A thermoplastic composition that includes a poly(arylene ether)-polysiloxane block copolymer is prepared by a method that includes oxidatively copolymerizing a monohydric phenol and a hydroxyaryl-terminated polysiloxane. The oxidative polymerization includes a monohydric phenol addition period characterized by a first temperature, a build period following the addition period and characterized by a second temperature greater than the first temperature, and a temperature ramp period between the addition period and the build period. During the temperature ramp period, the temperature is increased at an average rate of about 0.01 to about 0.35° C. per minute, which improves the efficiency with which the hydroxyaryl-terminated polysiloxane is incorporated into the poly(arylene ether)-polysiloxane block copolymer.
摘要:
A thermoplastic composition that includes a poly(arylene ether)-polysiloxane block copolymer is prepared by a method that includes oxidatively copolymerizing a monohydric phenol and a hydroxyaryl-terminated polysiloxane. The oxidative polymerization includes a monohydric phenol addition period characterized by a first temperature, a build period following the addition period and characterized by a second temperature greater than the first temperature, and a temperature ramp period between the addition period and the build period. During the temperature ramp period, the temperature is increased at an average rate of about 0.01 to about 0.35° C. per minute, which improves the efficiency with which the hydroxyaryl-terminated polysiloxane is incorporated into the poly(arylene ether)-polysiloxane block copolymer.
摘要:
A flame retardant poly(arylene ether) composition is described. In addition to the poly(arylene ether), the composition includes a polyolefin component, and a flame retardant composition that includes a metal dialkyl phosphinate. The polyolefin component can be a polyolefin polymer and/or the polyolefin block of a poly(alkenyl aromatic)-polyolefin block copolymer. The composition is particularly suitable as a replacement for poly(vinyl chloride) in insulation for wire and cable.
摘要:
A poly(2,6-dimethyl-1,4-phenylene ether) prepared using a morpholine-containing polymerization catalyst has a monomodal molecular weight distribution with a reduced content of very high molecular weight species. It also exhibits increased morpholine incorporation in the high molecular weight fraction. Compared to commercially available poly(2,6-dimethyl-1,4-phenylene ether) prepared using a di-n-butylamine-containing polymerization catalyst, the poly(2,6-dimethyl-1,4-phenylene ether) of the invention exhibits reduced odor. Compared to other poly(2,6-dimethyl-1,4-phenylene ether) prepared using a morpholine-containing polymerization catalyst, the poly(2,6-dimethyl-1,4-phenylene ether) of the invention exhibits improved molecular weight build during compounding and improved compatibilization with polyamides.
摘要:
A poly(2,6-dimethyl-1,4-phenylene ether) prepared using a morpholine-containing polymerization catalyst has a monomodal molecular weight distribution with a reduced content of very high molecular weight species. It also exhibits increased morpholine incorporation in the high molecular weight fraction. Compared to commercially available poly(2,6-dimethyl-1,4-phenylene ether) prepared using a di-n-butylamine-containing polymerization catalyst, the poly(2,6-dimethyl-1,4-phenylene ether) of the invention exhibits reduced odor. Compared to other poly(2,6-dimethyl-1,4-phenylene ether) prepared using a morpholine-containing polymerization catalyst, the poly(2,6-dimethyl-1,4-phenylene ether) of the invention exhibits improved molecular weight build during compounding and improved compatibilization with polyamides.