Ethylene propylene diene monomer (EPDM) composition for low-hardness glue injection
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A technology of EPDM and EPDM rubber, which is applied in the field of rubber, can solve problems such as product installation and use difficulties, and achieve the effects of improving bad appearance, reducing costs, and increasing plasticity and toughness
Inactive Publication Date: 2013-03-27
TIANJIN PENGYI GRP CO LTD
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At the same time, due to the high hardness of rubber, the hardness will increase to a certain extent in winter in low temperature environments, which will eventually lead to difficulties in product installation and use. It is precisely because of this that low hardness automotive intake and exhaust system hoses and hoses used in low temperature environments have been developed. Connecting pipe is very necessary
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[0020] An embodiment of a low-hardness EPDM composition formulation for glue injection:
[0021] In parts by mass
[0022]
[0023]
[0024] The raw materials in the formulations listed in the implementation are made into films for testing. The performance comparison of a low-hardness EPDM composition formulation for glue injection is as follows:
[0025]
[0026] From the data in the above table, it can be concluded that a low-hardness EPDM composition formulation for automotive rubber injection molding not only has a lower original hardness of only about 50 degrees, but also higher tensile strength and 100% tensile stress. At the same time, the performance after heat-resistant air aging is also more excellent, the performance after heat resistance is small, the compression set is also low, and the cold resistance and low temperature brittleness are excellent. It can be used in low temperature environments in different regions in winter. The lowest temperature can be It reaches min...
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Abstract
The invention relates to an ethylene propylene diene monomer (EPDM) composition for low-hardness glue injection. The composition comprises the following ingredients: EPDM rubber, activated zinc oxide, stearic acid, polyethylene glycol, 2,2,4-trimethyl-1,2-dihydroisoquinoline polymer, carbon black N330, carbon black N550, silicon dioxide hydrate, paraffin oil, coupling agent Si-69, accelerator DM, zinc diethyl dithiocarbamate, tetramethyl thiuram disulfide, bis(pentamethylene)thiuram tetrasulfide, and sulphur. According to the formula of the composition, the original hardness is low and is only about 50 degrees, the tensile strength and 100% stress at definite elongation are high, thermal air aging resistance property, the coldness resistance and low-temperature crispness are all excellent to meet the use requirement under low-temperature environment of different regions in winter, the lowest temperature can reach minus 45 degrees, glue injection technique is adopted to be capable of saving labor time and manual work. The composition formula can meet the requirements of RCF-510 grade material in MES MN300 standard.
Description
Technical field [0001] The invention relates to the technical field of rubber, in particular to a low-temperature resistant EPDM composition for low-hardness rubber injection. Background technique [0002] The main chain of EPDM (Ethylene Propylene Rubber) is composed of chemically stable saturated hydrocarbons and only contains unsaturated double bonds in the side chain, so it is basically a saturated rubber. Since there are no polar substituents in the molecular structure and the cohesive energy between molecules is low, the molecular chain can maintain flexibility in a wide temperature range. The chemical structure of ethylene propylene rubber gives its vulcanized products unique properties. [0003] EPDM (ethylene propylene diene monomer rubber), as a kind of rubber with good elasticity, abrasion resistance, heat resistance, weather resistance, ozone resistance, resistance to fresh water and sea water, has been widely used in rubber products for automobiles. Used in door and ...
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