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Fire retardant glass fiber reinforced nylon composite material, and preparation method thereof

A nylon composite material and glass fiber technology, applied in the field of glass fiber reinforced nylon composite material and its preparation, can solve the problems of corroded products, release of harmful substances, product performance degradation, etc. The effect of improving impact performance

Inactive Publication Date: 2014-07-23
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the advantage of using red phosphorus as a flame retardant is that it has high flame retardant efficiency and a small amount of addition, so it has little impact on the performance of the product. The main disadvantage is that the product may release harmful substances during processing and high-temperature and high-humidity environments, except for its dark infrared appearance. And corroded products, Sony and Panasonic have successively banned red phosphorus, and Apple has also restricted red phosphorus; the advantage of using organic hypophosphite as a flame retardant is that all properties are good, but the price is too high; magnesium hydroxide For the flame retardant, it needs to be added in a large amount to be flame retardant, resulting in a serious decline in product performance

Method used

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  • Fire retardant glass fiber reinforced nylon composite material, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) First dry nylon 6 in an oven at 90°C for 10 hours, take 100 parts of dried nylon 6, 50 parts of flame retardant melamine polyphosphate (of which P 2 o 5 content of 38%, N content of 45%), 10 parts of char-forming agent thermoplastic phenolic resin, 0.1 part of antioxidant 1010 and 0.2 parts of lubricant silicone powder, mixed in a high-speed mixer for 3 minutes;

[0042] (2) Dissolve 0.2 parts of coupling agent 3-aminopropyltriethoxysilane (KH550) in absolute ethanol to prepare a coupling agent-ethanol solution with a concentration of 0.5%, and spray the solution by spraying method On 40 pieces of chopped glass fiber (length 3.0mm), and dry the glass fiber sprayed with coupling agent solution in an oven at 120°C for 30min;

[0043] (3) Send the mixture in (1) above into the twin-screw extruder through the upstream feeding port, and at the same time, feed 40 parts of glass fibers in the above (2) into the twin-screw extruder through the downstream feeding port for m...

Embodiment 2

[0046] (1) First dry nylon 6 in an oven at 100°C for 8 hours, take 100 parts of dried nylon 6, 46.2 parts of flame retardant melamine polyphosphate (of which P 2 o 5 content of 34%, N content of 40%), 13.4 parts of carbon forming agent pentaerythritol phosphate, 0.2 parts of antioxidant 168 and 0.4 parts of lubricant TAF (modified ethylene bis fatty acid amide, Suzhou Xingtai Photochemical Auxiliary Co., Ltd.) mixed in a high-speed mixer for 4 minutes;

[0047](2) Dissolve 0.4 parts of the coupling agent 3-glycidyl etheroxypropyltrimethoxysilane (KH560) in absolute ethanol to prepare a coupling agent-ethanol solution with a concentration of 1.0%, and spray the Spray the solution on 53.3 parts of chopped glass fiber (length 4.5mm), and dry the glass fiber sprayed with the coupling agent solution in an oven at 110°C for 45 minutes;

[0048] (3) Send the mixture in the above (1) into the twin-screw extruder through the upstream feeding port, and at the same time, send 53.3 part...

Embodiment 3

[0051] (1) First dry nylon 6 in an oven at 110°C for 6 hours, take 100 parts of dried nylon 6, 44.5 parts of flame retardant melamine polyphosphate (of which P 2 o 5 content is 33%, N content is 39%), 11.1 parts of carbon forming agent pentaerythritol, 0.25 parts of antioxidant 1076 and 0.6 parts of lubricant RH-313A (Dongguan Jianxing Plastic Products Co., Ltd.) are mixed in a high-speed mixer 5min;

[0052] (2) Dissolve 0.6 parts of coupling agent 3-(methacryloyloxy)propyltrimethoxysilane (KH570) in absolute ethanol to prepare a coupling agent-ethanol solution with a concentration of 1.25%, and use the spray method Spray the solution on 70.0 parts of chopped glass fibers (6.0 mm in length), and dry the glass fibers sprayed with the coupling agent solution in an oven at 100°C for 60 minutes;

[0053] (3) Send the mixture in the above (1) into the twin-screw extruder through the upstream feeding port, and at the same time, send 66.7 parts of glass fibers in the above (2) int...

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Abstract

The invention belongs to the technical field of polymer composite materials, and relates to a glass fiber reinforced nylon composite material and a preparation method thereof. The composite material is composed of the following components in parts by weight: 100 parts of nylon, 35 to 50 parts of fire retardant, 7.5 to 15 parts of charring agent, 0.2 to 1.0 part of coupling agent, 0.1 to 0.5 part of antioxidant, 0.2 to 1.0 part of lubricant, and 400 to 100 parts of glass fiber. A fire retardant namely melamine polyphosphate is added so as to effectively solve the problem of candle wick effect of glass fiber reinforced nylon, and the modified nylon has the characteristics of strong charring performance, no dripping, no toxicity, and no corrosion. Moreover, a charring agent is added, and a synergetic fire retardant effect is generated by the cooperation of the charring agent and the melamine polyphosphate, so the fire-retardant performance of the nylon composite material is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and relates to a glass fiber reinforced nylon composite material and a preparation method thereof. Background technique [0002] Nylon is an important engineering plastic with good toughness, excellent electrical properties, oil resistance and wear resistance. However, pure nylon has poor strength and low heat distortion temperature, which affects the application of nylon in automobiles, electronics and other fields. At present, glass fiber (GF) reinforcement is generally required to improve its performance. Glass fiber reinforced nylon has the advantages of high strength and good dimensional stability and is widely used. Nylon is a flammable plastic, and its products used in the fields of electronics, transportation and construction generally require flame-retardant modification. For glass fiber-reinforced nylon, the "candle wick effect" of glass fiber makes the material eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08K13/06C08K9/06C08K7/14C08K5/3492C08K3/32
CPCC08K5/34928C08K7/14C08K13/06C08K2201/004C08L77/02C08L77/06C08L2201/02C08L2205/03C08L61/06C08L83/04C08K9/06
Inventor 杨桂生刘明昌
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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