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Environment-friendly flame retardant glass fiber reinforced polybutylece terephthalate (PBT) material with high comparative tracking index (CTI) value and high glow wire ignition temperature (GWIT) value and preparation method thereof

An environmentally friendly, glass fiber technology, applied in the field of composite materials, to achieve good dispersion, high GWIT value and CTI value, and improve impact performance.

Inactive Publication Date: 2013-03-06
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there have been no reports on composite materials that integrate the advantages of high GWIT value, high CTI value, environmental protection, and comprehensive performance balance.

Method used

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  • Environment-friendly flame retardant glass fiber reinforced polybutylece terephthalate (PBT) material with high comparative tracking index (CTI) value and high glow wire ignition temperature (GWIT) value and preparation method thereof
  • Environment-friendly flame retardant glass fiber reinforced polybutylece terephthalate (PBT) material with high comparative tracking index (CTI) value and high glow wire ignition temperature (GWIT) value and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of Example 1 PBT composite material (1)

[0038] The intrinsic viscosity of PBT is 1.0 dL / g. The composite flame retardant is composed of 50% by weight of BPS, 25% of magnesium hypophosphite and 25% of talcum powder. The surface of glass fiber is treated with silane coupling agent. Alkali-free glass fiber, the toughening agent is ethylene-methyl acrylate-glycidyl methacrylate random terpolymer, the antioxidant is antioxidant 1330, and the oxide is iron oxide.

[0039] Weigh each raw material component according to the following weight percentage content: PBT 45%, compound flame retardant 20%, antimony trioxide 4%, glass fiber 20%, toughening agent 10%, antioxidant 0.1%, oxidation 0.9%. Put the weighed raw materials into a high-mixer, mix for 2 minutes, discharge, and then extrude and granulate with a twin-screw extruder; the processing temperature of the twin-screw extruder is 230-240°C. The machine includes nine temperature zones, one of which is 230°C f...

Embodiment 2

[0040] Preparation of Example 2 PBT Composite Material (2)

[0041] The intrinsic viscosity of PBT is 0.8 dL / g. The composite flame retardant is composed of 50% by weight of BPS, 25% of magnesium hypophosphite and 25% of talcum powder. The surface of glass fiber is treated with silane coupling agent. Alkali-free glass fiber, the toughening agent is ethylene-methyl acrylate-glycidyl methacrylate random terpolymer, the antioxidant is antioxidant 1010, and the oxide is iron oxide.

[0042]Weigh each raw material component according to the following weight percentage content: PBT 55%, compound flame retardant 8%, antimony trioxide 3%, glass fiber 30%, toughening agent 2%, antioxidant 1%, oxidation 1%. Put the weighed raw materials into a high-mixer, mix for 5 minutes, discharge, and then extrude and granulate with a twin-screw extruder; the processing temperature of the twin-screw extruder is 230-240°C. The machine includes nine temperature zones, one of which is 230°C for the...

Embodiment 3

[0043] Example 3 Preparation of PBT Composite Material (3)

[0044] The intrinsic viscosity of PBT is 1 dL / g. The composite flame retardant is composed of 50% by weight of BPS, 25% of magnesium hypophosphite and 25% of talcum powder. The toughening agent is ethylene-methyl acrylate binary Copolymer, the antioxidant is antioxidant 1330, and the oxide is alumina.

[0045] Weigh each raw material component according to the following weight percentage content: PBT 50%, compound flame retardant 13%, antimony trioxide 3%, glass fiber 25%, toughening agent 8%, antioxidant 0.5%, oxidation 0.5%. Put the weighed raw materials into a high-mixer, mix for 3 minutes, discharge, and then extrude and granulate with a twin-screw extruder; the processing temperature of the twin-screw extruder is 230-240° C. The machine includes nine temperature zones, one of which is 230°C for the first stage, 230°C for the second stage, 235°C for the third stage, 235°C for the fourth stage, 240°C for the f...

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Abstract

The invention discloses an environment-friendly flame retardant glass fiber reinforced polybutylece terephthalate (PBT) material with high comparative tracking index (CTI) value and high glow wire ignition temperature (GWIT) value, which comprises the raw material components by weight percent: 45-68% of PBT, 6-20% of compound fire retardant, 3-15% of antimonous oxide, 20-30% of glass fiber, 2-10% of toughening agent, 0.1-1% of antioxidant and 0.1-1% of oxide, wherein the compound fire retardant comprises brominated polystyrene, magnesium hypophosphite and talcum powder. The invention also discloses a preparation method of the environment-friendly flame retardant glass fiber reinforced PBT material with high CTI value and high GWIT value. The composite material is higher in GWIT value and CTI value, better in flame retardant effect, environment-friendly in composite material and balanced in combination properties, thus being widely applied to products in the field of electronic electric appliances such as a low-voltage electronic capacitor shell, a load break switch, a carbon brush bracket, a moulded case circuit breaker and the like.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an environment-friendly flame-retardant glass fiber reinforced PBT material with high CTI value and high GWIT value and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (English name Polybutylene Terephthalate, referred to as PBT) is milky white translucent to opaque, crystalline thermoplastic polyester. It has high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, low water absorption, and maintains various physical properties (including electrical properties) in a humid environment, electrical insulation, and good formability. The disadvantage is that the notched impact strength is low and the molding shrinkage is large. Therefore, most of them are reinforced by glass fiber or modified by inorganic filling, the tensile strength and bending strength can be more than d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L25/06C08K13/06C08K9/06C08K7/14C08K3/22C08K3/32C08K3/34B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895C08K3/22C08K3/32C08K3/34C08K9/06C08L23/0884C08L25/18C08L67/02C09K21/14
Inventor 郭建鹏王尹杰
Owner SHANGHAI SUNNY
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