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High-performance EPDM particle and production process thereof

A high-performance, particle-based technology, applied in the field of rubber synthesis, can solve problems affecting the dispersion of polymer materials, low flame-retardant efficiency of composite materials, and easy agglomeration of particles, so as to reduce splashing and dripping and improve gas barrier Good performance and flame retardancy

Pending Publication Date: 2022-07-22
湖北晟弘新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, due to the high surface energy of Mg(OH)2 grains, the particles are prone to agglomeration, which affects its dispersion in polymer materials, and at the same time
The hydrophilicity of Mg(OH)2 is very strong, while most organic polymer materials are hydrophobic, which makes Mg(OH)2 have poor compatibility with polymer materials and weak interfacial bonding during application, resulting in its The flame retardant efficiency of composite materials is not high

Method used

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  • High-performance EPDM particle and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation method of high-performance EPDM particles

[0044] S1: Banburying: Add 130 parts of EPDM rubber to the Banbury mixer for 3min, then add 10 parts of zinc oxide and 3 parts of stearic acid to the Banbury mixer and continue to mix for 2-3min, then Continue to add 45 parts of pigments and 18 parts of rubber oil for banburying for 6min;

[0045] S2: Slicing: the internal compound obtained in the step S1 is opened and trained by an open mill, and then a tablet machine is performed to carry out a slice slicing process;

[0046] S3: Vulcanization: the slices obtained in step S3 are vulcanized in a vulcanization tank, and 8 parts of modified hexagonal flaky magnesium hydroxide are added for vulcanization molding.

Embodiment 2

[0048] A kind of preparation method of high-performance EPDM particles

[0049] S1: Banburying: Add 150 parts of EPDM rubber to the Banbury mixer for 2 minutes, then add 6 parts of zinc oxide and 2 parts of stearic acid to the Banbury mixer and continue to mix for 3 minutes, and then continue to add 45 parts of pigment and 20 parts of rubber oil are mixed for 7min;

[0050] S2: Slicing: the internal compound obtained in the step S1 is opened and trained by an open mill, and then a tablet machine is performed to carry out a slice slicing process;

[0051] S3: Vulcanization: The slices obtained in step S3 are vulcanized in a vulcanization tank, and 5 parts of modified hexagonal flake magnesium hydroxide and 20 parts of a flame retardant synergist are added and mixed for vulcanization molding.

Embodiment 3

[0053] A kind of preparation method of high-performance EPDM particles

[0054] S1: Banburying: Add 150 parts of EPDM rubber to the Banbury mixer for 3 minutes, then add 10 parts of zinc oxide and 3 parts of stearic acid to the Banbury mixer and continue to mix for 3 minutes, and then continue to add 50 parts of pigment and 15 parts of rubber oil are mixed for 5min;

[0055] S2: Slicing: the internal compound obtained in the step S1 is opened and trained by an open mill, and then a tablet machine is performed to carry out a slice slicing process;

[0056] S3: Vulcanization: The slices obtained in step S3 are vulcanized in a vulcanization tank, and 10 parts of modified hexagonal flake magnesium hydroxide and 10 parts of flame retardant synergist are added for vulcanization and molding.

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Abstract

The invention belongs to the technical field of rubber synthesis, and relates to a high-performance EPDM (Ethylene-Propylene-Diene Monomer) particle which comprises the following components in parts by weight: 120-150 parts of EPDM, 5-10 parts of zinc oxide, 2-3 parts of stearic acid, 40-50 parts of pigment, 15-20 parts of rubber oil, 5-10 parts of modified hexagonal flaky magnesium hydroxide and 10-20 parts of a flame-retardant synergist. The modified hexagonal flaky magnesium hydroxide is a substance with a specific exposed crystal face formed by reacting a magnesium hydroxide solution with sodium oleate, a dispersing agent and an initiator under the action of a structure-directing agent; modified hexagonal flaky magnesium hydroxide and a flame-retardant synergist have a synergistic effect, air on the surface of a polymer material is diluted by the modified hexagonal flaky magnesium hydroxide, so that the combustion speed of a polymer is slowed down, and meanwhile, a diffusion path of gas molecules is bent by a dispersion structure of the flaky magnesium hydroxide and the flame-retardant synergist in a polymer matrix; the gas permeability coefficient of the material is reduced, and the gas barrier property is further improved, so that a certain flame-retardant effect is achieved on the rubber composite material.

Description

technical field [0001] The invention belongs to the technical field of rubber synthesis, and particularly relates to a high-performance EPDM particle and a production process thereof. Background technique [0002] EPDM is a general-purpose rubber. It has the characteristics of good electrical insulation, aging resistance, solvent resistance, and strong filling ability. However, because EPDM is a non-flame retardant polymer material, its own limiting oxygen index is very low (only 17% or so). EPDM materials are widely used in the inner wall panels, floors, door and window seals of subway trains, and cables in tunnels. Once a fire occurs, in order to prevent the spread of fire, the EPDM used must have certain flame retardant properties. [0003] The Chinese invention patent with the authorization announcement number CN101993559BD discloses a green flame-retardant carpet backing material and a preparation method thereof. The invention relates to a green flame-retardant carpet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/00C08K3/22C08K5/09C08K7/00C08K9/04C08K3/04
CPCC08L23/16C08L2201/14C08L2201/02C08K2003/2296C08K2003/2224C08L91/00C08K3/22C08K5/09C08K7/00C08K9/04C08K9/08C08K3/042
Inventor 冷新兰
Owner 湖北晟弘新材料有限公司