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Halogen-free flame-retardation thermoplastic dynamic sulfurated ethylene-propylene-diene monomer rubber/polypropylene composition and preparation method thereof

A technology of polypropylene composition and EPDM rubber, which is applied in the field of thermoplastic dynamic vulcanized rubber preparation, can solve the problems of high melt viscosity of EPDM rubber, uneven dispersion of materials, difficulty in uniform dispersion, etc., and achieve excellent mechanical properties and flame retardant performance, the production process is simple and easy to operate, and the effect of reducing degradation

Inactive Publication Date: 2017-05-10
广东省石油化工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-step twin-screw extruder method is to blend and extrude the flame retardant and other materials at one time to obtain a flame-retardant material. Due to the high melt viscosity of EPDM rubber, it is not easy to disperse evenly under the short residence time of the screw; the twin-screw extruder The three-step extruder method is based on the composition of the formula, according to the method of mixing, dynamic vulcanization, and remixing, to obtain flame-retardant materials, which can effectively solve the problem of uneven material dispersion in the one-step method, but its production cycle is long and energy consumption High; the combination of open mill / flat vulcanizing machine, the production efficiency is extremely low

Method used

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  • Halogen-free flame-retardation thermoplastic dynamic sulfurated ethylene-propylene-diene monomer rubber/polypropylene composition and preparation method thereof
  • Halogen-free flame-retardation thermoplastic dynamic sulfurated ethylene-propylene-diene monomer rubber/polypropylene composition and preparation method thereof
  • Halogen-free flame-retardation thermoplastic dynamic sulfurated ethylene-propylene-diene monomer rubber/polypropylene composition and preparation method thereof

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preparation example Construction

[0064] The preparation method of the halogen-free flame-retardant thermoplastic dynamically vulcanized EPDM rubber / polypropylene composition includes the following steps:

[0065] 1) Add EPDM rubber, polypropylene, piperazine pyrophosphate, melamine pyrophosphate, zinc oxide, EPDM rubber grafted maleic anhydride and lubricant into the high-speed mixer, and mix well;

[0066] 2) Transfer the mixed materials in step 1) to a twin-screw extruder, melt extrusion, and pelletize;

[0067] 3) Add the mixed materials, initiator and vulcanizing agent in step 2) into the high-speed mixer, mix them evenly, and then transfer the materials to the twin-screw extruder, add rubber softening oil, extrude, and granulate to obtain halogen-free resistance Thermoplastic dynamic vulcanization EPDM rubber / polypropylene composition.

[0068] Preferably, the screw length-to-diameter ratio L / D of the twin-screw extruder is (48-60):1, the screw speed is 200-280 rpm, and the extrusion temperature is 80-200°C.

[0...

Embodiment 1

[0073] A halogen-free flame-retardant thermoplastic dynamically vulcanized EPDM rubber / polypropylene composition, the raw material composition of which is as follows (mass parts):

[0074] EPDM (2.3wt% diene, Mitsui Japan): 100 parts;

[0075] PP: 36.5 copies;

[0076] Flame retardant piperazine pyrophosphate: 40 parts;

[0077] Flame retardant melamine pyrophosphate (MPP): 26 parts;

[0078] Flame retardant synergist ZnO: 3 parts;

[0079] Compatibilizer EPDM-g-MAH: 27 parts;

[0080] Initiator BPO: 1 part;

[0081] Vulcanizing agent N, N'-m-phenylene bismaleimide (HVA-2): 8 parts;

[0082] Rubber softening oil: 105.5 parts;

[0083] Lubricant PE wax: 3 parts.

[0084] The preparation method of the halogen-free flame-retardant thermoplastic dynamically vulcanized EPDM rubber / polypropylene composition includes the following steps:

[0085] 1) Add EPDM, PP, flame retardant piperazine pyrophosphate, flame retardant MPP, flame retardant synergist ZnO, compatibilizer EPDM-g-MAH and lubricant PE wa...

Embodiment 2

[0090] A halogen-free flame-retardant thermoplastic dynamically vulcanized EPDM rubber / polypropylene composition, the raw material composition of which is as follows (mass parts):

[0091] EPDM (4.2wt% diene, ExxonMobil, USA): 100 parts;

[0092] PP: 46 parts;

[0093] Piperazine pyrophosphate: 40 parts;

[0094] MPP: 26 copies;

[0095] ZnO: 3 parts;

[0096] EPDM-g-MAH: 27 copies;

[0097] BPO: 1 copy;

[0098] HVA-2: 8 copies;

[0099] Rubber softening oil: 87 parts;

[0100] PE wax: 3 parts.

[0101] The preparation method of the halogen-free flame-retardant thermoplastic dynamically vulcanized EPDM rubber / polypropylene composition includes the following steps:

[0102] 1) Add EPDM, PP, flame retardant piperazine pyrophosphate, flame retardant MPP, flame retardant synergist ZnO, compatibilizer EPDM-g-MAH and lubricant PE wax into the high-speed mixer, and mix well;

[0103] 2) Transfer the mixed premix in step 1) to a parallel co-rotating twin-screw extruder, melt extrusion, and pelletize; ...

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Abstract

The invention discloses a halogen-free flame-retardation thermoplastic dynamic sulfurated ethylene-propylene-diene monomer rubber / polypropylene composition and a preparation method thereof. The ethylene-propylene-diene monomer rubber / polypropylene composition is prepared by ethylene-propylene-diene monomer rubber, polypropylene, coked piperazine phosphate, melamine pyrophosphate, zinc oxide, ethylene-propylene-diene-grafted maleic anhydride, an initiator, a vulcanizing agent, rubber softening oil and a lubricant. The preparation method comprises the following steps: 1) mixing EPDM, PP, coked piperazine phosphate, MPP, ZnO, EPDM-g-MAH and the lubricant, and dispersing the materials; 2) performing melt extrusion on a premix obtained in the step 1) and performing granulation on the premix; and 3) mixing the premix, the initiator, the vulcanizing agent and the rubber softening oil, extruding a mixture, and granulating the mixture. The ethylene-propylene-diene monomer rubber / polypropylene composition has the advantages of heat resistance, aging resistance, excellent mechanical property and flame resistance performance, enables thermoplastic processing, has a production process, and can be widely used for wire and cable compounds with high flame-resistance requirements.

Description

Technical field [0001] The invention relates to a halogen-free flame-retardant thermoplastic dynamic vulcanized EPDM rubber / polypropylene composition and a preparation method thereof, and belongs to the field of thermoplastic dynamic vulcanized rubber preparation. Background technique [0002] The dynamic vulcanization process refers to the vulcanization of the rubber during the melting and blending of the rubber and the thermoplastic. Since the rubber is continuously mixed with the thermoplastic while being vulcanized, the rubber is distributed as the dispersed phase in the continuous phase of the thermoplastic. The thermoplastic dynamically vulcanized EPDM rubber / polypropylene elastomer prepared by the dynamic vulcanization process. The vulcanized EPDM rubber is uniformly dispersed in the polypropylene matrix at the micron level. The elastomer not only has vulcanized EPDM Propylene rubber has the advantages of high temperature resistance, aging resistance, and low permanent com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/12C08L51/04C08K13/02C08K5/3492C08K5/3415C08K3/22C08K5/3462C08K5/14
CPCC08L23/16C08L2201/02C08L2201/22C08L2205/02C08L2205/035C08L23/12C08L51/04C08K13/02C08K5/34928C08K5/3415C08K2003/2296C08K5/3462C08K5/14
Inventor 王芳朱旭
Owner 广东省石油化工研究院
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