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High-CTI high-GWIT environment-friendly flame-retardant reinforced PBT engineering plastic for unattended electric appliance and preparation method thereof

A technology of engineering plastics and PBT resin, applied in the field of PBT modified engineering plastics, can solve the problems of inability to meet the requirements at the same time, and achieve the effect of high leakage resistance trace index, environmental friendliness and low cost

Active Publication Date: 2012-05-30
宁波华腾首研新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the usual flame-retardant reinforced PBT engineering plastics can only meet the FV-0 requirements mentioned in UL-94 in the United States, but cannot simultaneously meet the glow-wire flame-retardant test requirements and the leakage trace index (CTI) ≥ 300V requirements proposed by the IEC organization.

Method used

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  • High-CTI high-GWIT environment-friendly flame-retardant reinforced PBT engineering plastic for unattended electric appliance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] PBT resin 60kg; glass fiber 0kg; toughening agent maleic anhydride grafted polyethylene 3kg, carbon forming agent inorganic silicate 1kg; compound flame retardant: 20kg; The flame retardant is 5 kg of brominated epoxy resin, 1 kg of antimony white masterbatch, component B: 10 kg of melamine nitrogen-based flame retardant and component C: 4 kg of phosphorus-based flame retardant with phosphate ester structure.

[0050] Mix the above ingredients evenly and introduce them together. After adjusting the ZSK83 twin-screw extruder with a specific combination of screw and block, the processing temperature is controlled at 210-240°C; the screw speed is 180-250rpm / min, and then extrusion, cooling, Pelletizing obtains the final product of embodiment 1.

Embodiment 2

[0052] PBT resin 70kg; toughening agent maleic anhydride grafted polyethylene 5kg, carbon forming agent inorganic silicate 3kg; compound flame retardant: 39kg; component A in the compound flame retardant: brominated flame retardant namely bromine 10.5 kg of styrene, 3.5 kg of antimony white masterbatch; B component: 15 kg of melamine-based nitrogen-based flame retardant and C component: 10 kg of phosphorus-based flame retardant with phosphate ester structure.

[0053] After mixing the above ingredients evenly, introduce glass fiber accounting for 20% of the total weight ratio of the formula, and adjust the ZSK83 twin-screw extruder with a specific combination of screws and blocks. The extrusion temperature is controlled at 210-240 ° C; the screw speed is 180 ~250rpm / min, then extruded, cooled, and pelletized to obtain the final product of Example 2.

Embodiment 3

[0055] PBT resin 50kg, toughening agent maleic anhydride grafted polyethylene 7kg, carbon forming agent inorganic silicate 1.5kg, compound flame retardant: 25kg; component A in the compound flame retardant: brominated flame retardant 7 kg of brominated epoxy resin, 2 kg of antimony white masterbatch; component B: 1 kg of melamine nitrogen-based flame retardant and component C: 6 kg of phosphorus-based flame retardant with phosphate ester structure.

[0056] After mixing the above ingredients evenly, introduce glass fiber accounting for 30% of the total weight of the formula into ZSK83 twin-screw extruder with adjusted specific screw and block combination. The extrusion temperature is controlled at 210-240°C; the screw speed is 180-250rpm / min, then extruded, cooled, and pelletized to obtain the final product of Example 3.

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Abstract

The invention discloses high-CTI high-GWIT environment-friendly flame-retardant reinforced PBT engineering plastic for an unattended electric appliance and a preparation method thereof. The PBT engineering plastic consists of PBT resin, compound flame retardant, toughener and charcoal forming agent, wherein the compound flame retardant consists of the following three different types of flame retardants: a bromine fire-retardant system component A, a nitrogen fire-retardant system component B and a phosphor fire-retardant system component C. The preparation method comprises the following steps: accurately weighing the components in weight percentage in the formula; drying the PBT resin in advance; and extruding and granulating the raw materials by utilizing a twin-screw extruder after the raw materials are mixed in the formula weight percentage so as to obtain the engineering plastic particle product finally. The obtained PBT material of the invention has excellent flame retardant performance, high index of tracking resistance and environmental friendliness; and the content of environmental related substances accords with the standard requirements of European Union RoHS and REACH regulation.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a PBT modified engineering plastic used for unattended electrical products. Background technique [0002] Flame retardants need to be added to flame retardant reinforced PBT engineering plastics to improve the flame retardancy of PBT. For a long time, flame retardant polybutylene terephthalate (PBT) modified engineering plastics usually use brominated flame retardants, and the modified PBT with brominated flame retardants has high flame retardant efficiency and good flame retardant effect. advantage. However, the flame-retardant PBT engineering plastics of brominated flame retardants can only meet the flame-retardant grade of 0.8mm FV-0 required by the UL-94 standard of the American UL company, but they cannot meet the glow wire proposed by the European International Electrotechnical Association, the IEC organization. Flame retardant test requirements, that is, the evaluation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14C08K5/03C08K3/22C08K5/3492C08K5/521
Inventor 贾义军赵欣陈宇胡英绪
Owner 宁波华腾首研新材料有限公司
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