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Flame-retardant glass fiber reinforced PBT (polybutylene terephthalate) with high glow wires and high CTI (comparative tracking index) value and method for preparing flame-retardant glass fiber reinforced PBT

A technology of high glow wire and glass fiber, applied in the field of high glow wire, high CTI value flame retardant glass fiber reinforced PBT and its preparation

Inactive Publication Date: 2016-06-08
贝克兰(厦门)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the CTI of general flame-retardant nylon on the market is only 150-300V, which limits the application of PBT in some relatively demanding electrical appliances.

Method used

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  • Flame-retardant glass fiber reinforced PBT (polybutylene terephthalate) with high glow wires and high CTI (comparative tracking index) value and method for preparing flame-retardant glass fiber reinforced PBT
  • Flame-retardant glass fiber reinforced PBT (polybutylene terephthalate) with high glow wires and high CTI (comparative tracking index) value and method for preparing flame-retardant glass fiber reinforced PBT
  • Flame-retardant glass fiber reinforced PBT (polybutylene terephthalate) with high glow wires and high CTI (comparative tracking index) value and method for preparing flame-retardant glass fiber reinforced PBT

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of flame retardant glass fiber reinforced PBT with high glow wire and high CTI value

[0024] Table 1 Example 1 used each component dosage table (parts by mass)

[0025]

[0026] Mix all components in the formula except glass fiber evenly; put the mixed material in a twin-screw extruder to melt and extrude, and granulate; the processing technology is as follows: the temperature in the first zone of the twin-screw extruder is 230-250°C , The temperature in the second zone is 235~255℃, the temperature in the third zone is 240~260℃, the temperature in the fourth zone is 240~260℃, the temperature in the fifth zone is 220~240℃, the temperature in the sixth zone is 220~240℃, the temperature in the seventh zone is 230~250℃, the temperature in the eighth zone The zone temperature is 240-260°C, the die head temperature is 250-270°C, the screw speed: 380-420 rpm, the glass fiber is added from the glass fiber port of the twin-screw extruder, and the screw...

Embodiment 2

[0027] Example 2: Preparation of flame retardant glass fiber reinforced PBT with high glow wire and high CTI value

[0028] Table 2 Example 2 used each component dosage table (parts by mass)

[0029]

[0030] Preparation method: Same as Example 1 to obtain high glow wire and high CTI value flame retardant glass fiber reinforced PBT pellet II.

Embodiment 3

[0031] Example 3: Preparation of flame retardant glass fiber reinforced PBT with high glow wire and high CTI value

[0032] Table 3 Example 3 used each component dosage table (parts by mass)

[0033]

[0034]

[0035] Preparation method: Same as Example 1 to obtain high glow wire, high CTI value flame retardant glass fiber reinforced PBT pellet III.

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Abstract

The invention discloses a flame-retardant glass fiber reinforced PBT (polybutylene terephthalate) with high glow wires and a high CTI (comparative tracking index) value and a method for preparing the flame-retardant glass fiber reinforced PBT. The flame-retardant glass fiber reinforced PBT comprises, by weight, 38-45 parts of PBT, 5-8 parts of PET (polyethylene terephthalate), 15-18 parts of flame retardants A, 0.5-1.5 parts of flame retardants B, 5-8 parts of flame retardants C, 2-4 parts of toughening agents, 0.2-0.4 part of antioxidants, 0.3-0.6 part of lubricants and 25-30 parts of glass fibers. The flame-retardant glass fiber reinforced PBT and the method have the advantages that the glow wire ignition temperature (GWIT) of the flame-retardant glass fiber reinforced PBT can be increased and reaches 850 DEG C, and a comparative tracking index (CTI) of the flame-retardant glass fiber reinforced PBT can reach 400 V; the mechanical performance and the machining performance of the flame-retardant glass fiber reinforced PBT can be prevented from being damaged or only is damaged at low level.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant glass fiber-reinforced PBT with high glow wire and high CTI value and a preparation method thereof. Background technique [0002] PBT, Chinese name polybutylene terephthalate, is a crystalline thermoplastic resin, one of the five major engineering plastics, mainly used in the fields of electronic appliances, automobiles, machinery and instruments. In electronic appliances, nylon materials have requirements for flame retardancy, glow wire ignition temperature (GWIT) and comparative tracking index (CTI). [0003] The current modified PBT is generally flame retardant, but the flame retardant modification of PBT will lead to a sharp drop in the CTI value of nylon materials, and there will be dangers of fire caused by circuit leakage, short circuit, arc, electric spark, etc., and will make the product The mechanical properties and processability are obviou...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/08C08L25/06C08L63/00C08K13/04C08K5/3492C08K3/22C08K7/14
CPCC08L67/02C08L2201/02C08L2205/025C08L2205/03C08L2205/035C08L23/0869C08L25/06C08L63/00C08K13/04C08K5/34928C08K3/2279C08K7/14
Inventor 廖乾明周辉刘刚吴诗元
Owner 贝克兰(厦门)新材料有限公司
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