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Low-smoke halogen-free flame-retardant ethylene-propylene-diene mischpolymere rubber

A technology of EPDM rubber and composite flame-retardant system, which is applied in the field of low-smoke, halogen-free flame-retardant EPDM rubber, can solve the problems of poor flame-retardant effect, help flame spread, and limited flame-retardant effect, and achieve The flame retardant effect is not affected, the flame retardant effect is improved, and the flame retardant effect is good

Active Publication Date: 2013-05-01
CHANGZHOU SANYOU DIOR INSULATION MATERIALS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many literatures on flame retardancy of EPDM rubber, but there are still the following deficiencies: (1) Whether it is the NBS smoke box of the United States and France or the ISO None of the smoke boxes can effectively simulate the smoke generation in an actual fire. Therefore, the real flame retardant safety is to control the spread of flames and control the composition and generation of smoke
Most of the prior art is to increase the oxygen index of rubber, so the flame retardant effect is limited
(2) The formula contains a plasticizer. Since the plasticizer produces a lot of smoke when it is burned, the smoke density is high and the flame retardant effect is not good. Even if SUNPAR 2280 paraffin oil with high flash point and low volatility is used There are also obvious deficiencies
(4) When oxidizing acid or rare earth is used for flame retardancy, although the decomposition caused by oxidation can be eliminated, it will help the flame to spread, resulting in a large amount of smoke

Method used

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  • Low-smoke halogen-free flame-retardant ethylene-propylene-diene mischpolymere rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0015] The low-smoke, halogen-free and flame-retardant EPDM rubber of this embodiment is made of the following components in parts by weight:

[0016] 100 parts of EPDM rubber, 9 parts of red phosphorus, 120 parts of magnesium hydroxide, 24 parts of antimony trioxide, 20 parts of kaolin, 3 parts of zinc oxide, 1 part of titanate coupling agent, and 2.5 parts of DCP curing agent. Among them, red phosphorus, magnesium hydroxide, antimony trioxide and kaolin constitute a halogen-free composite flame retardant system. Zinc oxide and titanate coupling agent are processing aids.

[0017] Among them, the third monomer of EPDM rubber is ethylidene norbornene, its ethylene content is ≥60wt%, Mooney viscosity ML(1+4)100℃≥80.

[0018] The purity of red phosphorus is >85%, the ignition point is >340°C, and the mesh number is 1000 mesh.

[0019] The preparation method of the above-mentioned low-smoke, halogen-free and flame-retardant EPDM rubber is a conventional method: after the EPDM r...

Embodiment 2～ Embodiment 4）

[0022] Each embodiment is basically the same as Embodiment 1, and the differences are shown in Table 1.

[0023]

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Abstract

The invention discloses a low-smoke halogen-free flame-retardant EPDM rubber, which is made of EPDM rubber, a halogen-free composite flame-retardant system, a processing aid and a vulcanizing agent; the halogen-free composite flame-retardant The combustion system is composed of red phosphorus, inorganic hydroxide, antimony trioxide and kaolin; the processing aid is composed of zinc oxide and titanate coupling agent. The parts by weight of each component are as follows: 100 parts of EPDM rubber, 5-9 parts of red phosphorus, 80-120 parts of inorganic hydroxide, 10-30 parts of antimony trioxide, 10-20 parts of kaolin, 3 parts of zinc oxide parts, titanate coupling agent 1-1.5 parts, vulcanizing agent 2.5 parts. The low-smoke halogen-free flame-retardant EPDM rubber of the present invention has very good flame-retardant effect, its oxygen index (O.I.) > 32%, maximum smoke density (MSD) < 50, and smoke density rating (SDR) < 30.

Description

technical field [0001] The invention relates to a polymer material, in particular to a low-smoke, halogen-free, flame-retardant EPDM rubber. Background technique [0002] EPDM rubber is an important rubber material, which is widely used in automobiles, electronic appliances and other industries. However, this rubber is a flammable material with a low oxygen index, and the amount of smoke generated during combustion is relatively large, and the amount of carbon formed is very low. Therefore, it is very important to flame-retardant EPDM rubber. [0003] At present, there are many literatures on flame retardancy of EPDM rubber, but there are still some shortcomings: (1) Neither the NBS smoke box of the United States nor the ISO smoke box can effectively simulate the smoke generation in the actual fire, Therefore, the real flame retardant safety is to control the spread of flame and control the composition and generation of smoke. Most of the prior art is to improve the oxyge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08K13/02C08K3/02C08K3/22C08K3/34
Inventor 糜玥崎
Owner CHANGZHOU SANYOU DIOR INSULATION MATERIALS MFG
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