Halogen-free and flame-retardant nylon master batch with high CTI (Comparative Tracking Index) value and preparation method thereof

A flame-retardant nylon masterbatch technology, applied in the field of halogen-free flame-retardant nylon masterbatch and preparation, can solve the problems of appearance, processing performance and physical and mechanical performance deterioration, difficult to accurately control the addition ratio, hidden dangers of labor protection for operators, etc., to achieve Easy industrial production, good mechanical properties, low price effect

Active Publication Date: 2012-08-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Halogenated flame retardant is a kind of flame retardant with high flame retardant efficiency, but when it burns, it will emit harmful gas to the human body, and its application is limited
Although the newly developed intumescent and inorganic flame retardants are environmentally friendly flame retardants, they must be added in a large amount to achieve a good flame retardant effect. This not only leads to a significant decrease in the CTI value of nylon materials, but also has circuit leakage, The danger of fire caused by short circuit, electric arc, electric spark, etc.; and it also signi...

Method used

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  • Halogen-free and flame-retardant nylon master batch with high CTI (Comparative Tracking Index) value and preparation method thereof

Examples

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Effect test

Embodiment 1

[0017] 400g melamine polyphosphate, 200gFR-1 Fenghong flame retardant modified clay, 350g nylon 6, 4g antioxidant 1076, 30g PE maleic anhydride graft, 7g coupling agent KH-550, 9g calcium stearate Add it into a kneader, stir and mix evenly, dry it under vacuum at 60°C after starting, and then melt, extrude, and pelletize through a twin-screw extruder to obtain 1000g of flame-retardant nylon masterbatch finished product.

Embodiment 2

[0019] Add 450g red phosphorus, 80g zinc borate, 400g nylon 66, 20g antioxidant 1010, 20g POE maleic anhydride graft, 5g coupling agent KH-570, 25g zinc stearate into the kneader, stir and mix evenly, After starting the material, dry it under vacuum at 80°C, and then melt, extrude and granulate through a twin-screw extruder to obtain 1000g of flame-retardant nylon masterbatch finished product.

Embodiment 3

[0021] Add 520g melamine, 150g zinc oxide, 250g nylon 610, 5g antioxidant 626, 10g POE maleic anhydride graft, 20g PE maleic anhydride graft, 17g coupling agent NSZ-20, 28g polyethylene wax and knead In the machine, stir and mix evenly, dry at 90°C in vacuum after starting the material, and then melt, extrude, and granulate through a twin-screw extruder to obtain 1000g of flame-retardant nylon masterbatch finished product.

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Abstract

The invention relates to halogen-free and flame-retardant nylon master batch with a high CTI (Comparative Tracking Index) value and a preparation method thereof. The performance of nylon is influenced by the conventional nylon flame retardant. The master batch is a mixture. Every 100 parts by weight of master batch contain 40-75 parts by weight of main a flame retardant, 1-20 parts by weight of a flame-retardant synergist, 20-40 parts by weight of carrier resin, 0.4-2 parts by weight of an antioxidant, 1-5 parts by weight of a CTI improver, 0.5-3 parts by weight of a coupling agent and 0.5-5 parts of a dispersing agent. The method comprises the following steps of: uniformly stirring and mixing the raw materials proportionally, lifting, and drying at the temperature of 60-100 DEG C in vacuum to obtain a crude material; and melting, extruding and granulating the crude material through a dual-screw extruder to obtain a finished master batch. The master batch provided by the invention can be directly added into a nylon substrate proportionally, so that the flame retardance of the nylon material is improved efficiently, harmful gas is not emitted during burning, and a CTI value of over 500V is obtained; and the preparation method has the advantages of easiness for operating, low energy consumption and easiness for industrial production.

Description

technical field [0001] The invention relates to a high CTI (Comparative Tracking Index, relative tracking index) value halogen-free flame-retardant nylon masterbatch and a preparation method, belonging to the field of polymer materials. technical background [0002] Due to its excellent mechanical properties and chemical corrosion resistance, nylon is widely used in automobiles, electrical equipment, mechanical parts, transportation equipment, textiles, and papermaking machinery. However, its flame retardancy is extremely poor. In order to meet the requirements of flame retardancy, it must be modified by flame retardancy. [0003] At present, flame retardants are generally directly added to impart flame retardant properties to nylon. Halogenated flame retardant is a kind of flame retardant with high flame retardant efficiency, but it will emit harmful gas when burning, and its application is limited. Although the newly developed intumescent and inorganic flame retardants a...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/02C08L77/06C08L83/04C08K13/02C08K3/22C08K3/02C08K5/3492C08K3/32C08K3/38C08K3/36C08K13/06C08K9/00
Inventor 许亮李娟薛立新施明奎林鸿福
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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