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Ethylene-propylene-diene rubber compound and its preparation method

A technology of EPDM and EPDM, applied in the field of rubber materials, can solve the problems of high production cost, low production efficiency, high cost of molding die, etc., and achieve the effects of excellent ozone resistance and improved production efficiency.

Inactive Publication Date: 2012-02-15
SHENYANG YUANDA ALUMINUM IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the hardness of rubber products, it is usually produced by molding method, and the production of EPDM rubber products by molding method has high labor intensity and extremely low production efficiency, and the molding mold is expensive and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) The ingredients of each component are weighed according to the weight ratio:

[0040] Main ingredients: 30% EPDM raw rubber;

[0041] Accessories: Reinforcing agent is 36% carbon black with low structure and fast pressing;

[0042] Softener is 15% paraffin oil;

[0043] Hygroscopic agent is 3.1% calcium oxide;

[0044] The filler is light calcium carbonate 10%;

[0045] Additives: The accelerator is 0.2% zinc dibutyl dithiocarbamate, 0.1% zinc dimethyl dithiocarbamate, 0.2% dibenzothiazole disulfide and N-cyclohexyl-2-benzothiazolyl Sulfonamide 0.40% mixed;

[0046] The active agent is zinc oxide and stearic acid mixed in a mass ratio of 5:2, totaling 1.7%;

[0047] Functional additives are high styrene resin 7%;

[0048] The vulcanizing agent is 0.4% sulfur;

[0049] The modifier is 0.9% polyethylene glycol, and the total composition is 100%;

[0050] (2) Plasticizing the functional additives on the open mill;

[0051] (3) Put the EPDM rubber, plasticized functional additives, rei...

Embodiment 2

[0058] (1) The raw materials of each component are weighed according to the weight ratio:

[0059] Main ingredients: 30% EPDM raw rubber;

[0060] Accessories: Reinforcing agent is 36% carbon black with low structure and fast pressing;

[0061] Softener is 15% paraffin oil;

[0062] Hygroscopic agent is 3.1% calcium oxide;

[0063] The filler is light calcium carbonate 0;

[0064] Additives: accelerator zinc dibutyl dithiocarbamate 0.35%, dithiol benzothiazole 0.15%, dibenzothiazole disulfide 0.3%, and N-cyclohexyl-2-benzothiazolyl sulfenamide 0.5% mixed;

[0065] The active agent is 2.5% of zinc oxide and stearic acid in a mass ratio of 2:1;

[0066] Functional additives are high styrene resin 10%;

[0067] The vulcanizing agent is sulfur 0.5%;

[0068] The modifier is polyethylene glycol 1.6%, and the total composition is 100%;

[0069] (2) Plasticizing the functional additives on the open mill;

[0070] (3) Put the EPDM rubber, plasticized functional additives, reinforcing agents, fillers,...

Embodiment 3

[0077] (1) The raw materials of each component are weighed according to the weight ratio:

[0078] Main ingredient: 27% EPDM raw rubber;

[0079] Accessories: Reinforcing agent is 40% carbon black with low structure and fast pressing;

[0080] Softener is 17% paraffin oil;

[0081] Hygroscopic agent is 3.4% calcium oxide;

[0082] The filler is light calcium carbonate 0;

[0083] Additives: accelerator dithiol benzothiazole 0.3%, zinc dimethyl dithiocarbamate 0.3%, dibenzothiazole disulfide 0.2%, or N-cyclohexyl-2-benzothiazolyl sulfenamide 0.4% mixed;

[0084] The active agent is zinc oxide and stearic acid with a mass ratio of 5:1 totaling 1.7%;

[0085] Functional additives are 8.1% high styrene resin;

[0086] The vulcanizing agent is 0.4% sulfur;

[0087] The modifier is polyethylene glycol 1.4%, and the total composition is 100%;

[0088] (2) Plasticizing the functional additives on the open mill;

[0089] (3) Put the EPDM rubber, plasticized functional additives, reinforcing agents, fi...

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Abstract

The invention relates to the field of rubber materials, more specifically to an ethylene-propylene-diene rubber compound and its preparation method. By the adoption of an extrusion technology, the rubber compound is made from raw materials of a main material, auxiliary materials and additives, wherein the raw material contains 25-30 wt% of ethylene-propylene-diene raw rubber; the auxiliary materials contain 36-40 wt% of a strengthening agent, 15-17 wt% of a softener, 3.1-3.4 wt% of a hygroscopic agent, 0-10 wt% of a filler; and the additives contain 0.9-1.3 wt% of a promoter, 1.7-2.5 wt% of an activator, 7-10 wt% of a functional auxiliary agent, 0.4-0.5 wt% of a vulcanizing agent and 1.3-1.6 wt% of a modifier. The material provided by the invention has excellent weathering aging resistance, high-and low-temperature resistance, ultraviolet resistance and ozone resistance.

Description

Technical field [0001] The invention relates to the field of rubber materials, in particular to an EPDM rubber compound and a preparation method thereof. Background technique [0002] EPDM rubber is a kind of polyolefin, low-density rubber, with good aging resistance, electrical insulation properties and ozone resistance. It can be widely used in automobile tires and parts, as wire, cable sheath, high-voltage and super High-voltage insulation materials can also produce light-colored products such as leather shoes and sanitary products. In the prior art, the hardness of ordinary EPDM compound is generally lower than 80SHA after extrusion. In order to ensure the hardness of rubber products, the molding method is usually used for production, and the molding method to produce EPDM rubber products has high labor intensity, extremely low production efficiency, and expensive molds and high production costs. Summary of the invention [0003] The purpose of the present invention is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/02C08K3/04C08K3/22C08K3/26C08K3/06C08K5/09C08K5/39C08K5/47B29B7/28B29B7/72B29C47/92B29C35/02B29C48/92
Inventor 张应征宋洋于春波
Owner SHENYANG YUANDA ALUMINUM IND GROUP
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