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A special halogen-free flame-retardant masterbatch for nylon and its preparation method

A technology of flame retardant masterbatch and nylon, which is applied in the field of flame retardant modification of polymer materials, which can solve the problems of difficult feeding and uneven feeding, and achieve the effects of reducing usage, improving flame retardant efficiency and good dispersion ability

Active Publication Date: 2015-12-02
GUANGDONG JUSHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a special halogen-free flame retardant masterbatch for nylon, which solves the problem of difficult blanking or poor feeding of nylon materials due to the characteristics of the MCA flame retardant itself during the preparation process. The problem of homogeneity, and the masterbatch has good dispersibility, good flame retardant performance, non-toxic environmental protection, safe and reliable and easy to use, etc.

Method used

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preparation example Construction

[0028] Another object of the present invention is to propose a method for preparing nylon-specific halogen-free flame-retardant masterbatch, comprising the following steps:

[0029] 1) Dry the PA6 resin at a temperature of 90-100°C for 6-12 hours until the water content of the PA6 resin is less than 0.1%;

[0030] 2) Dry the nitrogen-based flame retardant at a temperature of 110-120°C for 4-8 hours until the water content of the nitrogen-based flame retardant is lower than 0.05%;

[0031] 3) Weigh the raw materials of the formula amount, mix other raw materials except the flame retardant, and stir evenly;

[0032] 4) Put the raw materials mixed uniformly in step 3) into the co-rotating twin-screw extruder for melt blending and extrusion, and add nitrogen-based flame retardants to the side feed at the same time, where the main feed and side feed units The mass ratio of time-fed materials is 2: (3~5), and the temperature of each zone of the co-rotating twin-screw extruder is co...

Embodiment 1

[0036] A preparation method for nylon-specific halogen-free flame-retardant masterbatch, comprising the following steps:

[0037] 1) Dry the PA6 resin (M2400) at a temperature of 90-100°C for 6-12 hours until the water content of the PA6 resin (M2400) is less than 0.1%;

[0038] 2) Dry the MCA-12 flame retardant at a temperature of 110-120°C for 4-8 hours until the water content of the MCA-12 flame retardant is less than 0.05%;

[0039] 3) Weigh raw material PA6 resin (M2400) 46%, MCA-12 flame retardant 50%, antioxidant 10981.4%, antioxidant 1681.6%, silicone powder E5250.8% and internal lubricant LicowaxC0. 2%, mix other raw materials except MCA-12 flame retardant, and stir evenly;

[0040] 4) Put the raw materials mixed uniformly in step 3) into the co-rotating twin-screw extruder for melt blending and extrusion, and at the same time add MCA-12 flame retardant to the side feed, where the main feed and side feed The feed material mass ratio per unit time is 2:(3~5), and the...

Embodiment 2

[0043] A preparation method for nylon-specific halogen-free flame-retardant masterbatch, comprising the following steps:

[0044] 1) Dry the PA6 resin (M2400) at a temperature of 90-100°C for 6-12 hours until the water content of the PA6 resin (M2400) is less than 0.1%;

[0045] 2) Dry the MCA-12 flame retardant at a temperature of 110-120°C for 4-8 hours until the water content of the MCA-12 flame retardant is less than 0.05%;

[0046] 3) Weigh raw material PA6 resin (M2400) 37%, MCA-12 flame retardant 60%, antioxidant 10980.4%, antioxidant 1680.6%, silicone powder E5251.0% and internal lubricant LicowaxC1. 0%, mix other raw materials except MCA-12 flame retardant, and stir evenly;

[0047] 4) Put the raw materials mixed uniformly in step 3) into the co-rotating twin-screw extruder for melt blending and extrusion, and at the same time add MCA-12 flame retardant to the side feed, where the main feed and side feed The feed material mass ratio per unit time is 2:(3~5), and the...

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Abstract

The invention discloses a special halogen-free flame-retardant master batch for nylon, which is prepared from the following raw materials in percentage by weight: 20-48% of PA6 resin, 50-70% of nitrogen flame retardant, 0.4-2.0% of main antioxidant, 0.6-3.0% of auxiliary antioxidant, 0.8-3.0% of external lubricant and 0.2-2.0% of internal lubricant. The master batch solves the problem of difficulty in baiting or nonuniformity in feeding caused by the characteristics of the MCA (melamine cyanurate) flame retardant when the MCA flame retardant is used for preparing the flame-retardant nylon material, has the characteristics of favorable dispersibility, favorable flame retardancy, no toxicity, environmental protection, high safety and reliability and the like, and is convenient to use. The invention also discloses a preparation method of the special halogen-free flame-retardant master batch for nylon. The method adopts a direct-cutting underwater granulation technique, so that the high-concentration flame-retardant master batch is implemented, thereby reducing the master batch consumption in the subsequent processing process, and lowering the influence of the carrier in the specific material.

Description

technical field [0001] The invention relates to the field of flame-retardant modification of polymer materials, in particular to a special-purpose halogen-free flame-retardant masterbatch for high-concentration nylon, and also relates to a preparation method of a special-purpose halogen-free flame-retardant masterbatch for high-concentration nylon. Background technique [0002] Nylon is an engineering plastic with excellent performance, wide range of uses and large dosage. It has excellent mechanical properties, wear resistance, good processing performance and chemical resistance. It is widely used in automobiles, electrical appliances, communications, electronics and Machinery and other fields. With the rapid development of society, such enterprises have higher and higher requirements on the performance of nylon products. Unmodified nylon plastics have poor flame retardancy and can only reach the V-2 or HB level according to the UL94 vertical combustion test standard. , fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08K5/00C08K5/3492C08J3/22
CPCB29B9/065B29C48/92B29C2948/92704C08K2201/003C08L77/02C08L2201/02C08L2201/22C08L83/04C08K5/34928
Inventor 李骏杨海民叶盾何燕岭李玲玉
Owner GUANGDONG JUSHI CHEM CO LTD
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