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Ethylene propylene diene rubber material

An EPDM rubber content technology, applied in the field of EPDM rubber materials, can solve the problems of metal corrosion and achieve the effect of broadening the application field

Active Publication Date: 2012-01-25
常熟华虞环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the EPDM rubber waterproofing membrane in the above-mentioned prior art corrodes metal, and provide a kind of EPDM that has no corrosion or little corrosion to metal and maintains the good performance of rubber. Propylene Rubber Material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] According to the EPDM rubber material provided by the present invention, the preparation method of the rubber material is well known to those skilled in the art, for example, the preparation method includes the following steps: mixing a mixture containing EPDM rubber, sulfur and a sulfur-containing accelerator Kneading at a temperature of 60-150°C for 8-18 minutes; then heating the mixture to 150-180°C for vulcanization for 5-15 minutes, vulcanizing.

[0028]In a preferred case, when the mixture contains calcium oxide, zinc oxide, stearic acid, carbon black and fillers in addition to EPDM rubber, additives, sulfur and a sulfur-containing accelerator, it is After mixing other components except additives, sulfur, calcium oxide and sulfur-containing accelerator, carry out one-stage mixing at a temperature of 100-150 ° C for 5-10 minutes to prepare a masterbatch. Then add additives, sulphur, calcium oxide and sulphur-containing accelerator to the masterbatch for 2-stage mix...

Embodiment 1

[0032] 100 parts by weight of ethylene propylene diene rubber (EPDM8340A, the Netherlands DSM), 60 parts by weight of carbon black (N550, Shanghai Cabot), 40 parts by weight of heavy calcium carbonate, 10 parts by weight of clay, 5 parts by weight of ZnO (domestic, 99.7% purity) was mixed with 1.0 parts by weight of stearic acid to obtain a mixture.

[0033] The mixture obtained above was kneaded for about 8 minutes at 120° C. in a 50 L internal mixer (manufactured by Shanghai Baihong Co., Ltd.) and left to stand for 24 hours to obtain a masterbatch.

[0034] 1.5 parts by weight of 2-mercaptobenzimidazole (Zhejiang Huangyan Chemical No. 3 Factory, MB), 0.5 parts by weight of microcrystalline wax (Asto, Okerin 1900, UK), 1.2 parts by weight of sulfur, 5.0 parts by weight of calcium oxide, 0.4 parts by weight of two Zinc methyldithiocarbamate, 1.0 part by weight zinc dibutyldithiocarbamate, 0.6 part by weight tetramethylthiuram disulfide, 1.0 part by weight 2-mercaptobenzothiazo...

Embodiment 2

[0043] 100 parts by weight of ethylene propylene diene rubber (EPDM8340A, the Netherlands DSM), 120 parts by weight of carbon black (N550, Shanghai Cabot), 20 parts by weight of heavy calcium carbonate, 50 parts by weight of clay, 10 parts by weight of ZnO (domestic, purity 99.7%), 1.5 parts by weight of stearic acid and 60 parts by weight of plasticizer paraffin oil (2280, American Sun brand) were mixed to obtain a mixture.

[0044] The mixture obtained above was kneaded for about 10 minutes in a 50L internal mixer (manufactured by Shanghai Baihong Co., Ltd. at 100° C.) and left to stand for 24 hours to obtain a masterbatch.

[0045] 0.4 parts by weight of 2-mercaptobenzimidazole (Zhejiang Huangyan Chemical No. 3 Factory, MB), 0.4 parts by weight of OKERIN 19004 (Asto, Okerin1900, UK), 1.0 parts by weight of sulfur, 3.0 parts by weight of calcium oxide, 0.6 parts by weight of dimethyl Zinc dithiocarbamate, 1.2 parts by weight of 1,2-ethylenethiourea, 0.8 parts by weight of te...

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Abstract

The invention provides an ethylene propylene diene rubber material. The material is a product formed by mixing and sulfurizing a mixture containing ethylene propylene diene rubber, sulfur and a sulfur-bearing accelerating agent, wherein the mixture also contains an additive which contains benzimidazole compounds and paraffin hydrocarbon. According to the ethylene propylene diene rubber material, the additive is added to the mixed mixture so that the ethylene propylene diene rubber does not corrode metal or has small corrosion, can maintain various performances of the ethylene propylene diene rubber material, and can be applied to the occasions matched with metals to further widen the application field of the ethylene propylene diene rubber.

Description

technical field [0001] The invention relates to a EPDM rubber material. Background technique [0002] EPDM is obtained by the polymerization of three monomers, ethylene, propylene and diene in the presence of a catalyst. The dienes as the third monomer are mainly ethylidene norbornene, dicyclopentadiene and 1 , 4-hexadiene and so on. EPDM rubber has good chemical stability, and its ozone resistance, aging resistance, chemical resistance, weather resistance and heat resistance are excellent. Its main production method is solution or suspension polymerization via Ziegler-Natta catalysts. Mainly used for high-grade cable materials, auto parts, especially for automobile sealing strips, wind and rainproof tapes, waterproof building materials, radiator hoses, shock absorbers and tire side tires. In addition, EPDM rubber is also widely used in electronic product sealing, high-end furniture, building bridges and stadium construction. [0003] Usually, in order to improve and imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08K13/02C08K5/3447C08K5/01C08K5/36C08J3/24
Inventor 王露
Owner 常熟华虞环境科技有限公司