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A kind of low-smoke halogen-free EPDM rubber composition and preparation method

A technology of EPDM rubber and its composition, which is applied in the field of flame retardants, can solve the problems of large impact on rubber mechanics and mechanical properties, easy precipitation of small organic molecule flame retardants, and large dosage of halogen-free flame retardants, etc., to achieve Excellent flame retardant performance, good char formation and high flame retardant efficiency

Active Publication Date: 2022-07-29
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the large amount of halogen-free flame retardants in the prior art, low flame retardant efficiency, large smoke release, great influence on rubber mechanics and mechanical properties, easy precipitation of organic small molecule flame retardants, red phosphorus and In order to solve problems such as restrictions on product color by carbon black additives, a low-smoke, halogen-free EPDM composition and preparation method are provided

Method used

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  • A kind of low-smoke halogen-free EPDM rubber composition and preparation method
  • A kind of low-smoke halogen-free EPDM rubber composition and preparation method
  • A kind of low-smoke halogen-free EPDM rubber composition and preparation method

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Effect test

Embodiment 1～9

[0046] According to the mass ratio of each component in Table 1 and the above-mentioned processing and preparation method, intumescent halogen-free flame retardant and flame retardant EPDM rubber material were prepared.

[0047] (1) Preparation of intumescent halogen-free flame retardants

[0048] Add the focus piperazine phosphate, hypophosphite and zinc borate in the intumescent flame retardant to the high-speed mixer according to the formula ratio of each component, control the stirring speed and stirring time, and ensure that the components are uniformly dispersed and mixed. The mixing time and speed are adjusted according to the actual operation of the high-speed mixer equipment.

[0049] (2) Preparation of flame retardant EPDM rubber

[0050] 1) adding a certain quality of EPDM rubber into the internal mixer for plasticizing, time 3min, rotating speed 50r / min, to obtain masterbatch;

[0051] 2) Add the corresponding quality of intumescent halogen-free flame retardant, ...

Embodiment 10～16

[0062] According to the mass ratio of each component in Table 2 and the above-mentioned processing and preparation method, an intumescent halogen-free flame retardant and a flame-retardant EPDM rubber material were prepared. In Examples 10 to 16, white carbon black, montmorillonite or silicon was added. One or a mixture of limestone fills and reinforces flame retardant EPDM rubber.

Embodiment 17

[0070] An intumescent halogen-free flame retardant, comprising the following components in parts by weight:

[0071] 85 parts of silane coupling agent modified focus piperazine phosphate;

[0072] 15 parts of zinc hypophosphite;

[0073] Zinc borate 5 parts.

[0074] Add the focused piperazine phosphate, hypophosphite and zinc borate to the high-speed mixer according to the formula ratio of each component. By controlling the stirring speed to 600r / min and the stirring time to 60min, ensure that the components are uniformly dispersed and mixed.

[0075] A low-smoke halogen-free EPDM rubber composition, the composition comprises the following components in parts by weight:

[0076]

[0077] The vulcanization aid is composed of the following components in parts by weight: 0.5 part of sulfur as vulcanizing agent, 0.5 part of sulfenamide vulcanization main accelerator CZ, 0.5 part of thiuram-type secondary accelerator TMTD, and 0.5 part of stearic acid as vulcanization active ...

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Abstract

The invention relates to a low-smoke halogen-free EPDM rubber composition and a preparation method, comprising the following components in parts by weight: 100 parts of EPDM rubber; 50-100 parts of an intumescent halogen-free flame retardant; 5 parts of a filler ~15 parts; 2 to 4 parts of vulcanization assistant; 1 to 3 parts of anti-aging agent. Compared with the prior art, the flame-retardant EPDM rubber prepared by the present invention has low smoke and no halogen, reaches the UL94 (1.6mm) V-0 level, and has good mechanical and mechanical properties. At the same time, the product is white and can be toned. The application of flame retardant rubber in automobiles, electronic appliances, construction and other fields.

Description

technical field [0001] The invention relates to a flame retardant, in particular to a halogen-free ethylene-propylene-diene rubber composition and a preparation method. Background technique [0002] EPDM is a copolymer of ethylene, propylene and a small amount of non-conjugated diene. It has excellent mechanical properties, processability and aging resistance such as ozone resistance, heat resistance and weather resistance. It has been widely used in high-speed rail. And automotive shock-absorbing sealing materials, wire and cable sheathing, engine thermal insulation ablation materials, electronic appliances and other fields. However, the oxygen index of EPDM material is 19%, which is a flammable material, and a large amount of black smoke and toxic gas will be released during the combustion process, causing serious harm to personal safety and the environment. Therefore, the flame retardant technology of EPDM rubber is involved. And flame retardant products with excellent p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L85/02C08K13/02C08K3/32C08K3/38C08K5/5313
CPCC08L23/16C08L2201/02C08L2201/22C08K2003/387C08L85/02C08K13/02C08K3/32C08K3/38C08K5/5313
Inventor 许肖丽林倬仕叶文陈涛尹亮肖雄胡爽许保云董玲玲
Owner SHANGHAI RES INST OF CHEM IND
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