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Flame-retardant master batch for nylon carrier and preparation method thereof

A technology of flame retardant masterbatch and carrier, which is applied in the field of nylon carrier flame retardant masterbatch and its preparation, can solve the problems of low dosage, difficult feeding, screw idling, etc., so as to increase dosage, reduce production cost, and reduce flame retardancy. good performance

Inactive Publication Date: 2012-02-29
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MCA is a powder material with a particle size of ≤2.0 microns and a bulk density of 450-550kg / m3, indicating that the MCA powder material is very fine, and it is difficult to unload the material when using a twin-screw extruder to produce halogen-free nylon. A bridge is formed at the material discharge port, which causes the material to hang in the air and cannot be discharged normally, the screw rotates idly, and the production bar is broken
At present, the amount of MCA added to halogen-free nylon is 8-12%, which is very low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The nylon carrier flame retardant masterbatch of this embodiment consists of the following components by weight percentage:

[0019] Polycaprolactam powder 49.6%; MCA 50%; antioxidant 10100.2%; antioxidant 1680.2%.

[0020] Its preparation method is as follows:

[0021] Step 1, take polycaprolactam powder, MCA, antioxidant 1010, antioxidant 168 by weight percentage as mentioned above;

[0022] Step 2. Add the weighed polycaprolactam powder, MCA, antioxidant 1010, and antioxidant 168 into a high-speed mixer and mix for 20 minutes. The temperature is controlled at 160°C;

[0023] Step 3. Cool the mixed material, put the cooled material into the hopper of the twin-screw extruder, melt and react, extrude and granulate; the process conditions of the twin-screw extruder are: the first zone of the twin-screw extruder The temperature is 180°C, the temperature in the second zone is 190°C, the temperature in the third zone is 210°C, the temperature in the fourth zone is 215°C, ...

Embodiment 2

[0025] The nylon carrier flame retardant masterbatch of this embodiment consists of the following components by weight percentage:

[0026] Polycaprolactam powder 29.6%; MCA 70%; antioxidant 10100.2%; antioxidant 1680.2%.

[0027] Its preparation method is as follows:

[0028] Step 1, take polycaprolactam powder, MCA, antioxidant 1010, antioxidant 168 by weight percentage as mentioned above;

[0029] Step 2. Add the weighed polycaprolactam powder, MCA, antioxidant 1010, and antioxidant 168 into a high-speed mixer and mix for 30 minutes. The temperature is controlled at 180°C;

[0030] Step 3. Cool the mixed material, put the cooled material into the hopper of the twin-screw extruder, melt and react, extrude and granulate; the process conditions of the twin-screw extruder are: the first zone of the twin-screw extruder The temperature is 190°C, the temperature in the second zone is 220°C, the temperature in the third zone is 220°C, the temperature in the fourth zone is 220°C, ...

Embodiment 3

[0032] The nylon carrier flame retardant masterbatch of this embodiment consists of the following components by weight percentage:

[0033] Polycaprolactam powder 19.4%; MCA 80%; antioxidant 10100.3%; antioxidant 1680.3%.

[0034] Its preparation method is as follows:

[0035] Step 1, take polycaprolactam powder, MCA, antioxidant 1010, antioxidant 168 by weight percentage as mentioned above;

[0036] Step 2. Add the weighed polycaprolactam powder, MCA, antioxidant 1010, and antioxidant 168 into a high-speed mixer and mix for 25 minutes. The temperature is controlled at 170°C;

[0037] Step 3. Cool the mixed material, put the cooled material into the hopper of the twin-screw extruder, melt and react, extrude and granulate; the process conditions of the twin-screw extruder are: the first zone of the twin-screw extruder The temperature is 185°C, the temperature in the second zone is 200°C, the temperature in the third zone is 215°C, the temperature in the fourth zone is 215°C, ...

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Abstract

The invention discloses a flame-retardant master batch for a nylon carrier and a preparation method thereof. The flame-retardant master batch comprises the following components in percentage by weight: 9.4-49.6 percent of polycaprolactam powder, 50-90 percent of MCA (Melamine Cyanurate) and 0.4-0.6 percent of antioxidant. The preparation method comprises the following steps: weighting the components according to the weight percent; adding the weighted components into a high-speed mixer, mixing for 20-30 minutes and controlling a temperature in a range of 160-180 DEG C; and cooling the mixed components, adding the cooled components into a hopper of a double-screw extruder, performing fusion reaction, extruding and pelletizing. The flame-retardant master batch for the nylon carrier prepared according to the preparation method is excellent in flame-retardant property; the additive amount of the MCA in nylon is increased; and the production cost is reduced.

Description

[technical field] [0001] The invention relates to the field of polymer materials, in particular to a nylon carrier flame-retardant masterbatch and a preparation method thereof. [Background technique] [0002] At present, the halogen-free flame retardant used for halogen-free nylon in the world is mainly MCA (melamine cyanurate). MCA is a nitrogen-based halogen-free flame retardant with excellent performance, and it is also a lubricant for excellent plastics. Compared with phosphorus-containing and halogen-containing flame retardants, MCA has the advantages of low toxicity, high flame-retardant efficiency, strong applicability, and low price. MCA is a non-toxic, harmless and environmentally friendly green product with high temperature resistance and thermal stability. Well, after adding MCA to synthetic resin, you can get a product that does not fade, does not bloom, and has excellent electrical and mechanical properties; MCA is especially suitable for the flame retardancy of...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K5/134C08K5/526C08K5/3492B29C47/92C08J3/22B29C48/92
CPCB29C48/04B29C48/40
Inventor 徐东徐永邢家思
Owner SHENZHEN KEJU NEW MATERIAL
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