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    • 5. 发明申请
    • EXTRUSION AGENT BASED ON A HETEROGENEOUS PVDF
    • 基于异质PVDF的挤出剂
    • WO2007080338A3
    • 2007-08-23
    • PCT/FR2007050612
    • 2007-01-05
    • ARKEMA FRANCEBONNET ANTHONYLAFFARGUE JOHANNBEAUME FRANCOIS
    • BONNET ANTHONYLAFFARGUE JOHANNBEAUME FRANCOIS
    • C08L23/00C08K5/00C08L27/16
    • C08L27/16C08K5/0008C08K5/06C08K5/10C08K5/32C08L23/00C08L23/0815C08L71/02C08L2205/06C08L2666/02C08L2666/04C08L2666/14
    • The invention relates to an extrusion agent comprising: at least one heterogeneous PVDF (A), in other words a copolymer of VDF and at least one comonomer of VDF, comprising by weight at least 50%, advantageously at least 75%, of VDF which has a melting point Tm (expressed in °C) > 172-549 m, preferably > 1.1 × (172-549 m), where m denotes the overall molar percentage of comonomer(s); and at least one interface agent (B), which are optionally diluted in a polyolefin (C). The heterogeneous PVDF preferably has a Tm of between 160 and 172°C. Advantageously it is also a VDF-HFP copolymer containing, by weight, from 88% to 92% of VDF and from 8% to 12% of HFP. The extrusion agent is used to reduce or eliminate the surface defects which arise during the extrusion of a thermoplastic resin (D). This resin may be a polyolefin, a styrenic resin, a polyester or a PVC. Optionally it may also be filled, i.e., may contain dispersed organic or inorganic particles.
    • 本发明涉及一种挤出剂,其包括:至少一种非均相PVDF(A),换言之,VDF和至少一种VDF共聚单体的共聚物,包含至少50%,有利地至少75%的VDF, 熔点Tm(以℃表示)>172-549μm,优选> 1.1×(172-549μm),其中m表示共聚单体的总摩尔百分数。 和至少一种界面剂(B),其任选地在聚烯烃(C)中稀释。 非均相PVDF优选具有160至172℃的Tm。 有利地,它也是含有重量百分比为88%至92%的VDF和8%至12%的HFP的VDF-HFP共聚物。 挤出剂用于减少或消除在挤出热塑性树脂(D)期间出现的表面缺陷。 该树脂可以是聚烯烃,苯乙烯树脂,聚酯或PVC。 任选地,它也可以被填充,即可以含有分散的有机或无机颗粒。