Low-smoke zero-halogen ethylene-propylene-diene monomer rubber composition and preparation method

A technology of EPDM rubber and composition, applied in the field of flame retardants, can solve the problems of large influence on rubber mechanics and mechanical properties, easy precipitation of organic small-molecule flame retardants, large dosage of halogen-free flame retardants, etc. The effect of small influence on other properties, long retention of protective properties, and high flame retardant efficiency

Active Publication Date: 2020-02-04
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Low-smoke zero-halogen ethylene-propylene-diene monomer rubber composition and preparation method
  • Low-smoke zero-halogen ethylene-propylene-diene monomer rubber composition and preparation method
  • Low-smoke zero-halogen ethylene-propylene-diene monomer rubber composition and preparation method

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Embodiment 1～9

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

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

[0048] Add the focused piperazine phosphate, hypophosphite and zinc borate in the intumescent flame retardant to the high-speed mixer according to the formula ratio of each component, and control the stirring speed and stirring time to ensure that the components are evenly dispersed and mixed. Stirring 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) Add a certain quality of EPDM rubber into the internal mixer for masticating, the time is 3min, the speed is 50r / min, and the masterbatch is obtained;

[0051] 2) Add corresponding quality intumescent halogen-free flame r...

Embodiment 10～16

[0062] According to the mass ratio of each component in Table 2 and the above-mentioned processing and preparation methods, prepare intumescent halogen-free flame retardants and flame-retardant EPDM materials, add white carbon black, montmorillonite or silicon One or a mixture of limestone is used to fill and reinforce 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 focused piperazine phosphate;

[0072] Zinc hypophosphite 15 parts;

[0073] Zinc borate 5 parts.

[0074] Add piperazine-focused 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, it is enough to ensure that the components are evenly dispersed and mixed.

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

[0076]

[0077] The vulcanization assistant consists of the following components in parts by weight: 0.5 part of sulfur as a vulcanizing agent, 0.5 part of a sulfenamide vulcanization primary accelerator CZ, 0.5 part of a thiuram secondary accelerator TMTD, and 0.5 part of stearic acid as a vulcanization a...

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Abstract

The invention relates to a low-smoke zero-halogen ethylene-propylene-diene monomer (EPDM) rubber composition and a preparation method. The composition comprises, by weight, 100 parts of EPDM rubber, 50-100 parts of an intumescent zero-halogen flame retardant, 5-15 parts of a filling agent, 2-4 parts of a vulcanizing agent and 1-3 parts of an anti-aging agent. Compared with the prior art, the prepared flame-retardant EPDM rubber is low in smoke and free of halogen, reaches a UL94 (1.6mm) V-0 grade and has good mechanical properties; and meanwhile, the product is white and can be subjected to color matching, so that the application of the flame-retardant rubber in the fields of automobiles, electronic appliances, buildings and the like is expanded.

Description

technical field [0001] The invention relates to a flame retardant, in particular to a halogen-free EPDM composition and a preparation method. Background technique [0002] Ethylene-propylene-diene rubber (EPDM) is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes. It has excellent mechanical properties, processing properties, 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 adiabatic 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, which will cause serious harm to personal safety and the environment. Therefore, flame retardant technology involving EPDM rubber And flame retardant products with exce...

Claims

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Application Information

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Patent Type & Authority Applications(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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