A free radical initiator system and a high pressure,...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/32 (2006.01) C08F 2/06 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2680577

The instant invention is a free radical initiator system, and a high pressure, free radical polymerization process for producing a low density polyethylene polymer. The free radical initiator system according to instant invention includes at least one peroxide initiator, at least one hydrocarbon solvent, and at least one polar co-solvent. The high pressure, free radical polymerization process for producing a low density polyethylene polymer includes the steps of polymerizing ethylene and optionally at least one comonomer under high pressure conditions using a free radical initiator system comprising at least one peroxide initiator, at least one hydrocarbon solvent, and at least polar co-solvent.

La présente invention concerne un système initiateur de radicaux libres, et un procédé de polymérisation de radicaux libres, à haute pression, pour la production d'un polymère de polyéthylène de faible densité. Le système initiateur de radicaux libres selon la présente invention comprend au moins un initiateur de peroxyde, au moins un solvant hydrocarboné, et au moins un co-solvant polaire. Le procédé de polymérisation de radicaux libres pour la production d'un polymère de polyéthylène de faible densité comprend les étapes de polymérisation d'éthylène et éventuellement d'au moins un comonomère dans des conditions de haute pression à l'aide d'un système initiateur de radicaux libres comprenant au moins un initiateur de peroxyde, au moins un solvant hydrocarboné et au moins un co-solvant.

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