摘要:
The invention provides a thermally-stable extrudable composition comprising fluropolymer and titanium dioxide, and further comprising an inorganic filler suitable for neutralizing the acid that forms during the step of extruding the composition, the filler having particles with a mean size of less than 100 nm, and preferably less than 60 nm.
摘要:
A process for the production of a moulding composed of foamed polytetrafluoroethylene by means of an extruder, includes introducing a foaming agent, which brings about foaming, into the polytetrafluoro-ethylene, where the extruder used includes a commercially available extruder, to which a thermoplastically processable, fusible polytetrafluoroethylene is fed, the polytetrafluoroethylene is fed to the extruder together with a foaming agent which has chemical action and which has a decomposition temperature of at least 320° C., and after its discharge from the extruder, the moulding is drawn off in the direction of production without any further measures relating to the foaming procedure.
摘要:
A foaming composition comprising a melt processible fluoropolymer, and a chemical foaming agent, where the chemical foaming agent is ammonium polyphosphate.
摘要:
A photocrosslinkable composition has polyorganosiloxane P having a viscosity of at least 10 000 mPa·s at 25° C., wherein the polyorganosiloxane P has an acrylated silicone oil as a crosslinking agent, and a photoinitiator, the chemical structure of which comprises a diaryl ketone group.
摘要:
The invention provides a photo-crosslinkable composition comprising: a base polymer selected from olefin homopolymers or copolymers, or mixtures thereof; a cross-linking agent; and a photoinitiator; characterized in that said photoinitiator is a compound with formula I: in which: X1 to X8 respectively represent CR1 to CR8; R1 to R8 are identical or different and represent a hydrogen atom or a halogen atom or OH or C(═O)R9 or C(═O)OR10 or SO3− or an aryl group, preferably a phenyl group, or an acryloyloxy group or a linear or branched C1-12 alkyl group; R9 and R10 are identical or different and represent a hydrogen atom or a linear or branched C1-12 alkyl group; n represents an integer equal to 0, 1 or 2; when n equals 0, formula I is selected from 9-fluorenone and its derivatives; when n equals 1; either Y represents a methylene group or a CHR11 group, R11 representing a hydrogen atom or a halogen atom or OH or C(═O)R9 or C(═O)OR10 or a linear or branched C1-12 alkyl group; or Y and X4 or Y and X5 together form an aryl group, preferably phenyl; when n equals 2, Y represents a methylene group.
摘要:
The invention relates to an electrical conductor coated in an insulating layer itself coated in a bonding layer, the conductor being characterized in that said bonding layer is obtained from a composition comprising a thermoplastics polymer and a settable resin. The invention also applies to a method of manufacturing such an electrical conductor coated in a bonding layer, the method being characterized in that it comprises applying said composition on said electrical conductor coated in said insulating layer, and applying treatment to cause said settable resin to be cured at least in part.
摘要:
The present invention relates to a power and/or telecommunications cable. The invention is remarkable in that the cable includes at least one constituent part based on a fire-resistant material of composition comprising a synthetic polymer and a fire-retardant filler, said fire-retardant filler comprising an inorganic compound associated with a hydrocarbon compound selected from the group of asphaltenes, malthenes, or any mixture of said components, each constituent part being selected from an insulating coating and a protective sheath.
摘要:
A photocrosslinkable composition has polyorganosiloxane P having a viscosity of at least 10 000 mPa·s at 25° C., wherein the polyorganosiloxane P has an acrylated silicone oil as a crosslinking agent, and a photoinitiator, the chemical structure of which comprises a diaryl ketone group.
摘要:
A foaming composition comprising a melt processible fluoropolymer, and a chemical foaming agent, where the chemical foaming agent is ammonium polyphosphate.