Ethylene propylene diene monomer grafted maleic anhydride and preparation method thereof

A technique for grafting EPDM rubber and maleic anhydride is applied in the field of grafting maleic anhydride on EPDM rubber and the preparation thereof, and can solve the problems of long grafting reaction time, limited application of EPDM and high production cost, Achieve the effects of high grafting rate and grafting efficiency, improving grafting rate and low equipment requirements

Inactive Publication Date: 2012-08-22
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] EPDM is a terpolymer of ethylene, propylene and non-conjugated dienes. It has good oxidation resistance, ozone resistance, low temperature resistance, impact resistance, and good thermal stability. It can be blended with engineering plastics to greatly improve The impact strength and low temperature resistance of engineering plastics, but EPDM itself is non-polar, and has poor compatibility with polar plastics such as polyamide and polyester. In order to improve the compatibility of EPDM with these polar plastics, it is often necessary to EPDM is used for grafting polar groups, among which, maleic anhydride MAH is the most widely used choice
[0003] The grafting modification of EPDM mainly includes solution grafting and melt grafting. The solution grafting method is used to graft EPDM to MAH. The grafting reaction time is long, the grafting efficiency is low, and a large amount of toxic and flammable solvents are consumed. High production cost, great harm to the human body, pollutes the environment, occupies a large area, and is difficult to achieve continuous operation
The EPDM obtained by the existing melting grafting method has strong odor, low color whiteness and grafting rate, thereby limiting the application of the EPDM

Method used

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  • Ethylene propylene diene monomer grafted maleic anhydride and preparation method thereof
  • Ethylene propylene diene monomer grafted maleic anhydride and preparation method thereof
  • Ethylene propylene diene monomer grafted maleic anhydride and preparation method thereof

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preparation example Construction

[0032] The embodiment of the present invention also provides the preparation method of above-mentioned EPDM grafted maleic anhydride, its technological process is as follows figure 1 shown. The method comprises the steps of:

[0033] S01. Weigh the formula components: weigh each component respectively according to the above-mentioned EPDM grafted maleic anhydride;

[0034] S02. Prepare the first solvent: dissolve the EPDM rubber weighed in step S01 in styrene monomer;

[0035] S03. Prepare the mixed material: add the initiator, maleic anhydride, and hexamethyl triamine phosphate weighed in step S01 to the first solution prepared in step S02 to obtain the mixed material;

[0036] S04. Melt extrusion: melt-extrude the mixed material in step S03, and granulate to obtain the EPDM grafted maleic anhydride.

[0037] Specifically, in the above step S01, the formulation of EPDM rubber grafted with maleic anhydride and the preferred content and type of each component in the formulat...

Embodiment 1

[0046] A kind of EPDM rubber grafted with maleic anhydride, its weight percent formulation components are shown in the following Table 1.

[0047] Its preparation method is as follows:

[0048] Weigh the styrene monomer at 1% by weight and pour it into the container. Dissolve 0.15% of BIPB in the styrene monomer and stir evenly. %, 1010 / 1680.2 / 0.1%, and 0.7% of other processing aids were weighed, poured into a blender, slowly added the styrene / BIPB mixed solution prepared earlier to the material, and stirred evenly. The mixed material is put into the hopper of the twin-screw extruder, grafted through melting reaction, extruded and granulated. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 140°C; zone 2: 150°C; zone 3: 160°C; zone 4: 150°C; machine head: 160°C; ~6min, the pressure is 15MPa.

Embodiment 2

[0050] A kind of EPDM rubber grafted with maleic anhydride, its weight percent formulation components are shown in the following Table 1.

[0051] Its preparation method is as follows:

[0052] Weigh the styrene monomer at 1% by weight and pour it into the container. Dissolve 0.15% of BIPB in the styrene monomer and stir evenly. %, 1010 / 1680.2 / 0.1%, and 0.7% of other processing aids were weighed, poured into a blender, slowly added the styrene / BIPB mixed solution prepared earlier to the material, and stirred evenly. The mixed material is put into the hopper of the twin-screw extruder, grafted through melting reaction, extruded and granulated. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 140°C; zone 2: 150°C; zone 3: 160°C; zone 4: 150°C; machine head: 160°C; ~6min, the pressure is 15MPa.

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Abstract

The invention discloses an ethylene propylene diene monomer grafted maleic anhydride and a preparation method thereof. The ethylene propylene diene monomer grafted maleic anhydride comprises the following components in percentage by weight: 95-97% of ethylene propylene diene monomer, 0.1-0.2% of initiator, 1.0-2.0% of maleic anhydride, 0.8-1.5% of styrene monomer and 0.2-0.5% of hexamethylphosphoramide. The grafting base maleic anhydride used as the grafting monomer is grafted in the melt extrusion process under the action of an initiator; and thus, the invention has the advantages of high grafting ratio, high grafting efficiency, small product peculiar smell, white color, environmental protection and high safety. The preparation method has the advantages of simple technique, easily controlled conditions, low cost and low facility request, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a EPDM rubber grafted with maleic anhydride and a preparation method thereof. Background technique [0002] EPDM is a terpolymer of ethylene, propylene and non-conjugated dienes. It has good oxidation resistance, ozone resistance, low temperature resistance, impact resistance, and good thermal stability. It can be blended with engineering plastics to greatly improve The impact strength and low temperature resistance of engineering plastics, but EPDM itself is non-polar, and has poor compatibility with polar plastics such as polyamide and polyester. In order to improve the compatibility of EPDM with these polar plastics, it is often necessary to EPDM is used for grafting polar groups, among which maleic anhydride MAH is the most widely used option. [0003] The grafting modification of EPDM mainly includes solution grafting and melt grafting. The solution gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/06C08K5/134C08K5/526B29B9/06B29C47/92B29C48/92
CPCC08F255/06B29B9/06B29B9/12C08F222/06
Inventor 徐东徐永周兵
Owner SHENZHEN KEJU NEW MATERIAL
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