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High flame retardant nylon resin and its preparation method

A technology of nylon resin and flame-retardant nylon, which is applied in the field of flame-retardant nylon resin and its preparation, can solve the problems of complex molecular structure of flame retardants, unfavorable large-scale industrial production, high price, etc., achieve durable flame retardancy and reduce dosage , Improve the effect of flame retardant performance

Active Publication Date: 2014-05-28
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the molecular structure of flame retardants required in the polymerization reaction method is complex and expensive, which is not conducive to large-scale industrial production

Method used

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  • High flame retardant nylon resin and its preparation method
  • High flame retardant nylon resin and its preparation method

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preparation example Construction

[0028] Below is the preparation method of implementation example and comparative example:

[0029] (1) The polymerization monomer, catalyst, reactive flame retardant, synergistic flame retardant, carbon forming agent and carbonization promoting agent are prepared into materials according to the above ratio.

[0030] (2) Put the prepared materials into the high-pressure reaction kettle, vacuumize, remove the air in the kettle, and react under the protection of high-purity nitrogen.

[0031] (3) Heat the reaction kettle, and start stirring after the temperature of the reaction kettle rises. The temperature of the reaction kettle is controlled at 200°C~300°C, the pressure of the kettle is controlled at 0.2Mpa~2.0Mpa, and the reaction is 1~12h.

[0032] (4) Open the pressure relief valve to reduce the pressure of the kettle to normal pressure, then vacuumize for 0.5~8h, and control the vacuum degree between -0.05~-0.1MPa.

[0033] (5) Finally, nitrogen is filled until the pressur...

Embodiment 1

[0035] Embodiments 1, 2, 3, 4, 5, and 6 are flame-retardant nylon resins prepared by the present invention. Comparing the data in Table 1 and Table 2, it can be seen that the flame-retardant nylon prepared by the present invention has good mechanical properties. The oxygen index is high, and the flame retardant grade reaches UL 94 V-0 level. At the same time, further comparison can be seen: the flame retardant nylon obtained in Example 2 is compared with Example 6, and it can be seen that the reactive flame retardant must be at least doubled to To achieve the same flame retardant effect, so the price will be doubled; comparative example 3 is only adding a flame retardant that does not participate in the reaction, and the flame retardant grade and oxygen index are obviously worse than that of embodiment 3; comparative example 4 only adds a reactive flame retardant Flame retardant, compared with the embodiment 6 that adds synergistic flame retardant, the flame retardant effect ob...

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Abstract

The invention discloses high flame retardant nylon resin and its preparation method. The preparation method comprises the following steps: reacting a polymerization monomer with a catalyst, a reactive flame retardant agent, a synergistic flame retardant agent, a carbon forming agent and a charring promoter according to a certain ratio at a specified temperature to obtain the flame retardant nylon resin, the reactive flame retardant agent can reacts with the polymerization monomer for polycondensation, and the synergistic flame retardant agent does not participate in the reaction, and is distributed in a polymer product to play a flame retardant function. The mechanical properties of the prepared flame-retardant nylon resin are good, the flame retardancy is long-lasting, the flame retardant efficiency is high, the flame retardant grade can reach UL94 standard V-0, and the flame-retardant nylon resin is suitable for injection of electronic equipment, household electrical appliances and automotive parts with environmental protection and flame retardant requirements, and is also suitable for military industry, aerospace and rail traffic fields with high flame retardant grade requirements.

Description

technical field [0001] The invention relates to a flame-retardant nylon resin and a preparation method thereof, in particular to a high flame-retardant nylon resin and a preparation method thereof. Background technique [0002] As the most important engineering plastic, nylon has many excellent properties, such as high strength, heat resistance, wear resistance and solvent resistance, etc., and is widely used in construction, chemical industry, transportation and military fields. However, nylon itself is flammable and easily produces flaming droplets when burned, which can easily cause a fire. Therefore, how to improve the flame retardancy of nylon has always been the focus of research in the industry. [0003] There are mainly two ways to improve the flame retardancy of nylon, the blending addition method and the polymerization reaction method. The blending addition method mainly refers to passing the nylon matrix resin and the flame retardant through the screw extruder, a...

Claims

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Application Information

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IPC IPC(8): C08G69/42
Inventor 汤鑫焱胡天辉杨克俭王文志邓凯桓姜其斌
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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