A halogen-free flame retardant reinforced pa/pok alloy material resistant to humidity and heat aging

A technology of alloy materials and heat and humidity resistance, which is applied in the field of polymer composite materials, can solve the problems of poor flame retardant effect, lower polymer surface temperature, and unsatisfactory flame retardant effect, and achieve small changes in mechanical properties, excellent wear coefficient, The effect of good mechanical properties

Active Publication Date: 2021-06-04
SHANGHAI CHANGWEI JINCI ENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although MCA has a good flame retardant effect in POK / PA alloy materials, but in flame retardant glass fiber reinforced materials, the flame retardant effect is not good
This is because the flame retardant mechanism of MCA is that it releases CO when it burns. 2 , NH 3 , N 2 Such inert gases, these inert gases can dilute the concentration of oxygen and combustible gases produced by the decomposition of polymers, and non-combustible gases can also take away part of the heat, reducing the surface temperature of polymers, and at the same time the generated N 2 It can capture free radicals and inhibit the chain reaction of high polymers, thereby preventing the burning of polymers, but due to the influence of glass fiber in PA66 "candle wick effect", the flame retardant effect is not ideal

Method used

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  • A halogen-free flame retardant reinforced pa/pok alloy material resistant to humidity and heat aging
  • A halogen-free flame retardant reinforced pa/pok alloy material resistant to humidity and heat aging
  • A halogen-free flame retardant reinforced pa/pok alloy material resistant to humidity and heat aging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6 and comparative example 1-4

[0068] Components and proportioning of table 1 embodiment 1-6 and comparative examples 1-4

[0069]

[0070] Preparation:

[0071] (1) Weigh the raw materials according to the weight ratio, and dry PA66 and POK at 100°C for 4 hours respectively;

[0072] (2) Add the dried PA66, POK, compatible impact modifier, halogen-free flame retardant, flame retardant synergist, and additives into a high-speed mixer and mix for 6-8 minutes;

[0073] (3) Then the mixed material and glass fiber are extruded, cooled, and granulated through a twin-screw extruder. Note that the glass fiber is fed from the side of the 5th zone of the extruder; the temperature of the 11 zones of the twin-screw extruder is set Set at 250°C, 260°C, 270°C, 270°C, 260°C, 260°C, 250°C, 250°C, 250°C, 250°C, 250°C; the obtained pellets were dried at 120°C for 4 hours and then dried at 260-280°C Under injection molding into standard splines, that is.

Embodiment 7

[0074] Embodiment 7: Evaluation of implementation effect

[0075] With comparative example 1-4, the sample that embodiment 1-6 obtains, according to American Society for Testing and Materials (ASTM) standard test mechanical property, according to UL94 standard test flame retardancy, according to the abrasion coefficient of GB 3960-83 standard test material, Damp heat aging is carried out according to GB / T 2423.3-2016, and the aging time is 300h. The test results are shown in Table 2 below:

[0076] The test result of table 2 embodiment 1-6 and comparative example 1-4

[0077]

[0078]

[0079] The test performance results in Table 2 show that:

[0080] (1) From the analysis of Comparative Example 1, Examples 2, 5, and 6, it is obtained that during the damp heat aging process, the water plasticization caused by water absorption, hydrolytic degradation, and thermal oxygen aging under high humidity act together, resulting in the stretching of PA66+GF And the bending perfo...

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Abstract

The invention relates to the field of polymer composite materials, in particular to a halogen-free flame-retardant reinforced PA / POK alloy material resistant to damp heat aging, which consists of the following components in parts by weight: 130-620 parts of PA66, 50-200 parts of POK, glass Fiber 200-350 parts, compatible impact modifier 10-50 parts, halogen-free flame retardant 100-200 parts, flame retardant synergist 10-50 parts, additives 10-20 parts. The alloy material of the present invention adopts aluminum diethyl hypophosphite and polysiloxane compound flame retardancy, the flame retardancy can reach V-0, and has good mechanical properties; the alloy material of the present invention is flame retardant after damp heat aging The resistance can still reach V-0, and the change of mechanical properties is small; the wear coefficient of the alloy material of the present invention is better than that of pure flame-retardant PA66+GF.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a halogen-free flame-retardant reinforced PA / POK alloy material resistant to damp heat aging and a preparation method thereof. Background technique [0002] Nylon 66 has the characteristics of thermoplasticity, light weight, high mechanical strength, high rigidity, chemical resistance and good durability. It is used to manufacture various parts of machinery, automobiles, chemicals, and electronic and electrical devices. Among them, glass fiber reinforced nylon 66 (PA66 / GF) plays a very important role in modern industry because of its excellent mechanical properties and high service temperature. The disadvantages of bubble dripping, poor wear resistance, and easy water absorption greatly limit its application, especially in the field of electronics and electricity. [0003] Polyketone (POK) is a new type of green polymer material synthesized from carbon monoxide and ole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L73/00C08K7/14C08K9/06C08K5/20C08K13/06
CPCC08L77/06C08L2201/08C08L2205/035C08L73/00C08L83/04C08K7/14C08K9/06C08K5/20C08K13/06
Inventor 朱爱华赵志刚程方清岳同健张毅胡同云蒲伟张龙
Owner SHANGHAI CHANGWEI JINCI ENG PLASTIC
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