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Environment-friendly flame retardant glass fiber reinforced polyamide 66 (PA66) 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, can solve the problems of not providing the GWIT and CTI of the composition, the high total content of the main flame retardant and the auxiliary flame retardant, and the unsuitable electricity environment, etc., and reach the GWIT value And the effect of high CTI value, improving anti-oxidation performance and reducing friction coefficient

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

AI Technical Summary

Problems solved by technology

Traditional brominated flame retardants can no longer meet the requirements of high-standard products. Some traditional flame retardant compound systems, such as glass fiber + decabromodiphenylethane + antimony trioxide compound system, glass fiber + brominated Polystyrene + antimony trioxide composite system, the CTI value (comparative tracking index, relative tracking index) and GWIT value (glow-wire ignition temperature, glow wire ignition temperature) of these composite systems are not high, not Suitable for high-demand electrical environments
[0004] Chinese Patent Document Application No. 200610028821.1, published on January 16, 2008, discloses a flame retardant enhanced PA66 composition, the flame retardant enhanced PA66 composition The product consists of PA66 base resin, glass fiber, main flame retardant (brominated epoxy resin with molecular weight above 10000), auxiliary flame retardant antimony trioxide, toughening agent maleic anhydride grafted POE, stabilizer hydrotalcite, lubricant stearic acid and antioxidant hindered phenols and phosphites, the prepared PA66 composition has good mechanical properties and good flame retardant effect, but the total content of the main flame retardant and auxiliary flame retardant is high, not Provide the GWIT and CTI status of the composition
However, there is no report on the composite PA66 material that combines 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 polyamide 66 (PA66) 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 polyamide 66 (PA66) 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] Example 1 Preparation of PA66 composite material (1)

[0038] The intrinsic viscosity of PA66 is 2.8 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 compatibilizer is maleic anhydride grafted POE, the antioxidant is antioxidant 1330, and the oxide is iron oxide.

[0039] Weigh each raw material component according to the following weight percentage content: PA66 45%, compound flame retardant 20%, antimony trioxide 4%, glass fiber 20%, compatibilizer 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 220-255°C. The machine includes nine temperature zones, one of which is 220°C for the first stage, 250°C for the sec...

Embodiment 2

[0040] Example 2 Preparation of PA66 Composite Material (2)

[0041] The intrinsic viscosity of PA66 is 2.8 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 compatibilizer is maleic anhydride grafted POE, the antioxidant is antioxidant 1010, and the oxide is iron oxide.

[0042] The raw material components were weighed according to the following weight percentages: PA66 55%, compound flame retardant 8%, antimony trioxide 3%, glass fiber 30%, compatibilizer 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 220-255°C. The machine includes nine temperature zones, one of which is 220°C for the first stage, 250°C for the second s...

Embodiment 3

[0043] Example 3 Preparation of PA66 Composite Material (3)

[0044] The intrinsic viscosity of PA66 is 2.0 dl / g. The composite flame retardant is composed of 45% by weight of BPS, 30% of magnesium hypophosphite and 25% of talcum powder. The compatibilizer is maleic anhydride grafted PPO. The antioxidant is antioxidant 1330, and the oxide is alumina.

[0045] Weigh each raw material component according to the following weight percentage content: PA66 50%, compound flame retardant 13%, antimony trioxide 3%, glass fiber 25%, compatibilizer 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 220-255°C. The machine includes nine temperature zones, one of which is 220°C for the first stage, 250°C for the second stage, 255°C for the third stage, 255°C for the fourth stage, 255°C for the fifth stage, 2...

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Abstract

The invention discloses an environment-friendly flame retardant glass fiber reinforced polyamide 66 (PA66) 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 PA66, 6-20% of compound fire retardant, 3-15% of antimonous oxide, 20-30% of glass fiber, 2-10% of compatilizer, 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 PA66 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 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 environmentally friendly flame-retardant glass fiber reinforced PA66 material with high CTI value and high GWIT value and a preparation method thereof. Background technique [0002] Nylon (Nylon), Chinese name polyamide, English name Polyamide (referred to as PA), is a general term for thermoplastic resins containing repeated amide groups—[NHCO]—on the main molecular chain. Its name depends on the number of carbon atoms in the synthetic monomer, such as: polycaprolactam (nylon 6, referred to as PA6), polyhexamethylene adipamide (nylon 66, referred to as PA66), polydecanediamine sebacate (nylon 1010, referred to as PA1010), polyhexamethylene sebacamide (nylon 610, referred to as PA610), polyundecamide (nylon 11, referred to as PA11), polydodecamide (nylon 12, referred to as PA12), polyadipamide Diamine (Nylon 46, referred to as PA46). PA has high crystallinity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L25/04C08K13/06C08K3/22C08K7/14C08K3/32C08K3/34
Inventor 杨涛郭建鹏
Owner SHANGHAI SUNNY
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