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Halogen-free flame retarding strengthened PA66 material and preparation method thereof

A technology of compatible toughening agent and weight ratio, which is applied in the field of halogen-free flame-retardant reinforced PA66 materials for circuit breaker shells and its preparation, can solve the problems of non-compliance with halogen-based flame retardants, poor flame-retardant effect, and CTI value Decrease and other issues, to achieve the effect of high cost performance, increase CTI value, and high CTI value

Inactive Publication Date: 2012-03-21
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a halogen-free flame-retardant reinforced PA66 material and its preparation method to solve the problem that the halogen-based flame retardants in the prior art do not meet the EU ROS environmental protection standard, and other organic halogen-free flame retardants such as MCA , The M-MPP flame retardant effect is not good, and the addition amount is large, and the CTI value drops significantly, etc.

Method used

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  • Halogen-free flame retarding strengthened PA66 material and preparation method thereof
  • Halogen-free flame retarding strengthened PA66 material and preparation method thereof
  • Halogen-free flame retarding strengthened PA66 material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh raw materials according to weight percentage, PA66 resin 41%, highly filled red phosphorus masterbatch 18%, CTI modifier 2%, corrosion inhibitor 5%, compatible toughener 3%, antioxidant 0.4%, lubrication Mix 0.6% of the agent evenly to obtain the mixed raw materials; pour the above mixed raw materials into the barrel of the twin-screw machine, adjust the screw speed and the main feeding speed, add 30% of the alkali-free long glass fiber, and extrude and granulate under suitable process conditions. The halogen-free flame-retardant reinforced PA66 pellets were obtained. The process conditions are: the temperature of the feeding section in the first zone is 260-290°C, the temperature of the compression section in the second zone is 260-280°C, the temperature in the metering section of the third zone is 250-280°C, the temperature of the head in the fourth zone is 270°C, and the screw speed is 550RPM.

[0032] Among them, the mixed raw materials are added at the main f...

Embodiment 2

[0035] Weigh raw materials according to weight percentage, PA66 resin 38%, highly filled red phosphorus masterbatch 16%, CTI modifier 1%, corrosion inhibitor 4%, compatible toughener 4%, antioxidant 1.0%, lubrication Mix 1.0% of the agent evenly to obtain the mixed raw materials; pour the above mixed raw materials into the barrel of the twin-screw machine, adjust the screw speed and the main feeding speed, add 35% of the alkali-free long glass fiber, and extrude and granulate under suitable process conditions. The halogen-free flame-retardant reinforced PA66 pellets were obtained. The process conditions are: the temperature of the feeding section in the first zone is 260-290°C, the temperature of the compression section in the second zone is 260-280°C, the temperature in the metering section of the third zone is 250-280°C, the temperature of the head in the fourth zone is 270°C, and the screw speed is 550RPM.

[0036] Among them, the mixed raw materials are added at the main f...

Embodiment 3

[0039] Weigh raw materials according to weight percentage, PA66 resin 34%, highly filled red phosphorus masterbatch 15%, CTI modifier 3%, corrosion inhibitor 3%, compatible toughener 4%, antioxidant 0.6%, lubrication Mix 0.4% of the agent evenly to obtain the mixed raw materials; pour the above mixed raw materials into the barrel of the twin-screw machine, adjust the screw speed and the main feeding speed, add 40% of the alkali-free long glass fiber, and extrude and granulate under suitable process conditions. The halogen-free flame-retardant reinforced PA66 pellets were obtained. The process conditions are: the temperature of the feeding section in the first zone is 260-290°C, the temperature of the compression section in the second zone is 260-280°C, the temperature in the metering section of the third zone is 250-280°C, the temperature of the head in the fourth zone is 270°C, and the screw speed is 550RPM.

[0040] Among them, the mixed raw materials are added at the main f...

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Abstract

The invention discloses a halogen-free flame retarding strengthened PA66 material and a preparation method thereof. The PA66 material comprises the following components by weight percent: 34% to 41% of PA66 resin, 30% to 40% of alkali-free long glass fiber, 15% to 18% of high filling red phosphorus masterbatch, 1% to 3% of CIT (comparative tracking index) improving agent, 3% to 5% of anti-corrosion inhibiting corrosion agent, 3% to 5% of compatible flexibilizer, 0.4% to 1% of antioxygen and 0.4% to 1% of lubricant. The sum of the weight percent of the components is 100%. In the halogen-free flame retarding strengthened PA66 material, the red phosphorus masterbatch is selected as a flame retardant, the flame retarding strengthened PA66 is applied to a shell of a breaker so that the CTI value of the flame retarding strengthened PA66 is greatly improved and the corrosivity to metal is reduced. The material has high cost performance, low additive amount, efficient flame retarding and high CTI value are realized, and the corrosivity of the material to metal is reduced by adding the inhibiting corrosion agent, therefore, the application field of the material is expanded, the service life of a product is prolonged, and the new requirement on the application field of electric products is met.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a halogen-free flame-retardant reinforced PA66 material for a circuit breaker shell and a preparation method thereof. Background technique [0002] PA66, also known as nylon 66 (polyhexamethylene adipate), is a translucent or opaque milky white crystalline polymer with plasticity. Density 1.15g / cm3, melting point 252°C, embrittlement temperature -30°C, thermal decomposition temperature greater than 350°C, continuous heat resistance 80-120°C, equilibrium water absorption 2.5%. It is resistant to acid, alkali, most inorganic salt solutions, halogenated alkanes, hydrocarbons, esters, ketones, etc., but is easily soluble in polar solvents such as phenol and formic acid. It has excellent wear resistance, self-lubricating property and high mechanical strength. However, it has high water absorption and thus poor dimensional stability. [0003] At present, glass fiber reinfo...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K13/04C08K7/14C08K3/02C08K5/47B29B9/06B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/90B29B9/06B29B9/12B29B9/14B29C48/40B29C48/92B29C2948/9259B29C2948/92885C08J3/226C08J2377/00C08J2477/00C08K3/02C08K7/14C08K2003/026C08L51/04C08L51/06C08L77/06C09K21/04
Inventor 徐东徐永文胜
Owner SHENZHEN KEJU NEW MATERIAL
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