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Ethylene propylene diene monomer hose for microwave vulcanization

A technology of EPDM rubber and EPDM hoses, which is applied in the direction of hoses, pipes, pipes/pipe joints/fittings, etc., to achieve the effects of increasing vulcanization speed, saving manpower, and improving production efficiency

Inactive Publication Date: 2011-03-16
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a medium-high hardness EPDM rubber specially designed for microwave vulcanization. Through reasonable formula design, the product can be vulcanized by microwave vulc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] EPDM rubber 100 parts,

[0028] N550 120 parts,

[0029] 60 parts of light calcium carbonate,

[0030] 70 parts of paraffin oil (P-2280),

[0031] Defoamer Type I 5 parts,

[0032] Zinc oxide 4 parts,

[0033] 3 parts stearic acid,

[0034] 1 part polyethylene glycol,

[0035] 1 part of 2,2,4-trimethyl-1,2-dihydroquinoline polymer,

[0036] 1.5 parts of N-cyclohexyl-2-benzothiazolylsulfenamide (CZ),

[0037] 1.5 parts of dibenzothiazole disulfide (DM),

[0038] Tetramethylthiuram disulfide (TMTD) 0.5 part,

[0039] Sulfur (S) 1.3 parts.

[0040] Performance of Example 1: hardness 69.5, tensile strength 8.73, elongation 295.8; 125°C×70h after thermal aging, hardness 78.3, hardness change 8.8, tensile strength 9.87, tensile strength change rate 13.06%, elongation rate 173.2, the elongation change is -41.45%, and the compression set is 53.77. The product performance meets the standard requirements, and the product section is dense and free of micropores.

Embodiment 2

[0042] EPDM rubber 100 parts,

[0043] N539 140 copies,

[0044] 40 parts of light calcium carbonate,

[0045] Paraffin oil (P-2280) 80 parts,

[0046] 8 parts of defoamer type II,

[0047] Zinc oxide 5 parts,

[0048] 2 parts stearic acid,

[0049] 2 parts polyethylene glycol,

[0050] 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer,

[0051] 2 parts of N-cyclohexyl-2-benzothiazolylsulfenamide (CZ),

[0052] 1 part of dibenzothiazole disulfide (DM),

[0053] 1 part of tetramethylthiuram disulfide (TMTD),

[0054] Sulfur (S) 1 part.

[0055]Example 2 performance: hardness 72.5, tensile strength 10.43, elongation 248.8; 125 ℃ × 70h after heat aging hardness 79.1, hardness change 6.6, tensile strength 11.57, tensile strength change rate 10.93%, elongation rate 147.7, the elongation change is -40.64%, and the compression set is 44.84. The product performance meets the standard requirements, and the product section is dense and free of micropores.

Embodiment 3

[0057] EPDM rubber 100 parts,

[0058] N568 160 copies,

[0059] 50 parts of light calcium carbonate,

[0060] Paraffin oil (P-2280) 90 parts,

[0061] Defoamer Type II 15 parts,

[0062] Zinc oxide 6 parts,

[0063] 1 part stearic acid,

[0064] 3 parts of polyethylene glycol,

[0065] 3 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer,

[0066] 1 part of N-cyclohexyl-2-benzothiazolylsulfenamide,

[0067] 0.5 parts of dibenzothiazole disulfide,

[0068] 1.5 parts of tetramethylthiuram disulfide,

[0069] Sulfur 2 parts.

[0070] Example 3 performance: hardness 73.8, tensile strength 10.70, elongation 225.4; 125 ℃ × 70h after heat aging hardness 80.3, hardness change 6.5, tensile strength 11.72, tensile strength change rate 9.53%, elongation rate 134.3, the elongation change is -39.97%, and the compression set is 42.34. The product performance meets the standard requirements, and the product section is dense and free of pores.

[0071] The rubber formula of the...

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Abstract

The invention relates to an ethylene propylene diene monomer hose suitable for microwave vulcanization. The hose is prepared by the following components in part by mass: 100 parts of ethylene propylene diene monomer, 120-160 parts of fast extruding carbon black, 40-60 parts of light calcium carbonate, 70-90 parts of paraffin oil, 5-15 parts of dehumidification defoaming agent, 4-6 parts of zinc dioxide, 1-3 parts of stearic acid, 1-3 parts of polyethylene glycol, 1-3 parts of 2,2,4-trimethyl-1,2-dhydroquinoline polymer, 1-2 parts of N-cyclohexyl-2-benzothiazolyl sulfonamide, 0.5-1.5 parts of dibenzothiazyl disulfide, 0.5-1.5 parts of tetramethylthiuram disulfide and 1-2 parts of sulfur. The hose can achieve the goal of improving the production efficiency, saving labor resource and raw material while meeting the product performance by employing the formulation special for microwave vulcanization.

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to microwave vulcanized EPDM rubber hoses. Background technique [0002] At present, steam autoclave vulcanization is widely used in domestic and foreign rubber hose industries. This process uses high temperature and high pressure to achieve vulcanization and crosslinking. Steam autoclave vulcanization can provide higher pressure for vulcanized products, so it will be helpful to the performance of the product. However, the period of this vulcanization method is relatively long, about 5 to 10 hours, and special vulcanization, cleaning and other work are required. Especially for straight products with small inner diameter and long length, it is not only difficult to insert and place the mandrel, but also more likely to cause damage to the product. Such a production process will cause a serious waste of labor and raw material resources, and the production efficiency will be low,...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K3/04C08K3/26C08K3/22C08K5/09C08K5/47C08K5/40C08K3/06F16L11/04
Inventor 张洪起郭翼
Owner TIANJIN PENGYI GRP CO LTD
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