Halogen-free flame-retardant nitrile rubber/nylon thermoplastic elastomer and preparation method thereof

A technology of thermoplastic elastomer and flame-retardant nitrile, which is applied in the field of thermoplastic elastomers, can solve the problems of poor flame-retardant performance and poor mechanical properties, and achieve the effect of easy repeated processing, easy processing and good flame-retardant performance

Inactive Publication Date: 2019-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new non-halogen compound with good mechanical properties and flame retardant properties in order to overcome the poor mechanical properties and poor flame retardant properties of the nitrile rubber / nylon alloy provided by the prior art. Flame Retardant Nitrile / Nylon Thermoplastic Elastomer

Method used

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  • Halogen-free flame-retardant nitrile rubber/nylon thermoplastic elastomer and preparation method thereof

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preparation example Construction

[0026] In order to make the halogen-free flame-retardant nitrile rubber / nylon thermoplastic elastomer of the present invention have more excellent tensile strength, abrasion resistance, excellent solvent resistance and flame retardant properties, the present invention provides the second aspect as described above. The preferred preparation method prepares the halogen-free flame-retardant nitrile rubber / nylon thermoplastic elastomer of the present invention, and the method comprises:

[0027] (1) Component A containing nitrile rubber, anti-aging agent and auxiliary agent is carried out first mixing to obtain masterbatch;

[0028] (2) extruding and granulating the masterbatch to obtain masterbatch particles;

[0029] (3) Dynamic vulcanization and granulation of the masterbatch particles and component B containing nylon, antioxidant, vulcanizing agent and flame retardant.

[0030] The dosage of each component involved in the second aspect of the present invention is the same as ...

Embodiment 1

[0043] According to the formula shown in Table 1, the following processing method was performed to obtain the elastomer P1.

[0044](1) at 40 ℃, sequentially add nitrile rubber, antioxidant RD, auxiliary (liquid paraffin and stearic acid, and the weight ratio of liquid paraffin and stearic acid is 1:0.2) into the internal mixer, dense The rotor speed of the mill is 70 rpm, and the mixing is performed for 10 minutes to obtain a masterbatch;

[0045] (2) at a screw speed of 100 rpm and an extrusion temperature of 180° C., extruding and granulating the masterbatch through a single-screw extruder to obtain masterbatch particles;

[0046] (3) A co-rotating intermeshing twin-screw extruder is used, the screw speed is 100 rpm, the main feeding speed is 40 rpm, the temperature of the head is 180 ℃, the temperature of the screw feeding section is 150 ℃, and the temperature of the melting and kneading section is 180 ℃, Add the masterbatch particles obtained in step (2) and nylon, antio...

Embodiment 2

[0048] According to the formula shown in Table 1, the following processing method was performed to obtain the elastomer P2.

[0049] (1) At 45°C, add nitrile rubber, antioxidant MB, auxiliary (liquid paraffin and stearic acid, and the weight ratio of liquid paraffin and stearic acid is 1:0.2) into the internal mixer in turn, densely The rotor speed of the mill is 60 rpm, and the blending is performed for 8 minutes to obtain a masterbatch;

[0050] (2) at a screw speed of 80 rpm and an extrusion temperature of 160° C., extruding and granulating the masterbatch through a single-screw extruder to obtain masterbatch particles;

[0051] (3) A co-rotating intermeshing twin-screw extruder is used, the screw speed is 80 rpm, the main feeding speed is 30 rpm, the temperature of the head is 200 ℃, the temperature of the screw feeding section is 120 ℃, and the temperature of the melt-kneading section is 200 ℃, Add the masterbatch particles obtained in step (2) and nylon, antioxidant 101...

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Abstract

The invention relates to the field of thermoplastic elastomers, and discloses a halogen-free flame-retardant nitrile rubber/nylon thermoplastic elastomer and a preparation method thereof, wherein thethermoplastic elastomer contains a nitrile rubber, nylon, a flame retardant, a vulcanizing agent, an anti-aging agent, an antioxidant and an auxiliary agent, the vulcanizing agent is an organic peroxide, and the organic peroxide is at least one selected from dicumyl peroxide, bis(t-butylperoxyisopropyl)benzene, t-butyl cumene peroxide, 2,5-bis(t-butyl peroxy)-2,5-dimethyl-3-hexyne, 2,5-bis-(tert-butyl peroxy)-2,5-dimethyl hexane, dibenzoyl peroxide, tert-butyl peroxybenzoate, and di-tert-butyl peroxide. According to the present invention, the nitrile rubber/nylon thermoplastic elastomer has characteristics of high elasticity, easy processing, repeated processing, good flame retardant performance and the like, and can be used for vehicle oil pipelines and sealing members.

Description

technical field [0001] The invention relates to the field of thermoplastic elastomers, in particular to a halogen-free flame-retardant nitrile-butadiene rubber / nylon thermoplastic elastomer and a preparation method thereof. Background technique [0002] Nitrile rubber / nylon thermoplastic elastomer is a material prepared from nitrile rubber and nylon through dynamic vulcanization reaction technology. The material has excellent mechanical properties, processability and oil resistance. [0003] Both nitrile rubber and nylon have polar groups, and their surface energies match, so they have good blending compatibility. The thermoplastic elastomer materials prepared by the dynamic vulcanization process have good tensile strength, resistance to Abrasiveness and excellent solvent resistance, as well as high elasticity, easy processing and repeated processing, can be used in automobile oil pipelines and sealing parts. [0004] However, both nitrile rubber and nylon materials are eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L77/02C08L77/06C08L91/06C08L23/06C08K13/02C08K5/14C08K5/3437C08K5/378C08K5/134C08K5/09C08K3/32C08K5/526
CPCC08K2003/323C08L9/02C08L2201/02C08L2201/22C08L2203/18C08L2205/03C08L2207/04C08L77/02C08L77/06C08L91/06C08L23/06C08K13/02C08K5/14C08K5/3437C08K5/378C08K5/1345C08K5/09C08K3/32C08K5/526
Inventor 李洪真王超吕鹏飞吴卫东
Owner CHINA PETROLEUM & CHEM CORP
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