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Ethylene propylene diene monomer/polypropylene thermoplastic elastomer composition, thermoplastic elastomer material and application
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A technology of EPDM rubber and thermoplastic elastomer, applied in the field of EPDM rubber/polypropylene thermoplastic elastomer material, can solve the problem of low dosage of crosslinking agent, achieve simplified process flow, excellent mechanical properties and processing performance, cost reduction
Pending Publication Date: 2022-08-09
CHINA PETROLEUM & CHEM CORP +1
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[0004] The purpose of the present invention is to provide a kind of EPDM rubber / polypropylene thermoplastic elastomer material that needs to use auxiliary cross-linking agent when the dynamic vulcanization of peroxidesystem exists in the prior art. Polypropylene thermoplastic elastomer composition and EPDM rubber / polypropylene thermoplastic elastomer material and application, the EPDM rubber / polypropylene thermoplastic elastomer composition and EPDM rubber / polypropylene thermoplastic elastomer material The amount of cross-linking agent in it is low and it has better mechanical properties and processing properties without additional auxiliary cross-linking agent
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preparation example Construction
[0031] According to the present invention, the preparation method of the EPDM rubber comprises the following steps:
[0032] In the presence of an inertatmosphere and a solvent, a mixed gas containing ethylene, propylene and hydrogen is introduced, and an activator, a liquid polybutadiene, an alkylaluminum compound and a vanadium compound are sequentially added to carry out a polymerization reaction to obtain the EPDM rubber.
[0033] According to the present invention, the activator is selected from at least one of halides, sulfonylchloride compounds and oxygen-containing nitrogen-containing compounds, preferably ethyl trichloroacetate.
[0034] According to the present invention, the number average molecular weight of the liquid polybutadiene is 500-5000, and the content of 1,2-structure is ≥80wt% based on the total weight of the liquid polybutadiene.
[0035] According to the present invention, the alkylaluminum compound is selected from AlR 3 , AlR 2 X, Al 2 R 3 X ...
preparation example 1-6
[0074] In a 2-liter stainless steel stirred tank, under the protection of high-purity nitrogen, the pressure of the mixed gas was introduced to reach 0.6MPa, the molar ratio of ethylene and propylene in the mixed gas was 1:5, and the hydrogen content was 0.5mol%, followed by adding 1000ml hexane , 1 mmol ethyl trichloroacetate, 2 mmol sesquialuminum (Al(C 2 H 5 ) 1.5 Cl 1.5 ), a certain amount of liquid polybutadiene (the content of 1,2-structure is 85wt%), 0.1mmol of VOCl 3 Stir and react at 10°C for 30min. After the polymerization, 0.5ml of terminator isopropanol and 1ml of anti-aging agent 1076 were added, and then coagulated and dried in a conventional manner to obtain EPDM-A1 to EPDM-A6 EPDM rubbers, respectively, and subjected to GPC, NMR, DSC The test results are shown in Table 1.
preparation example 7
[0076] EPDM was prepared according to the method of Preparation Example 1, except that the content of 1,2-structure in the liquid polybutadiene was 90 wt%. Preparation of EPDM-A7.
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Abstract
The invention relates to the technical field of polymercomposite material production, and discloses an ethylene propylene dienemonomer / polypropylenethermoplasticelastomer composition, which comprises ethylene propylene dienemonomer, polypropylene and a cross-linking agent, wherein the dosage of the ethylene propylene dienemonomer is 20-60 parts by weight; the polypropylene accounts for 10 to 50 parts by weight; the dosage of the cross-linking agent is 0.1-2 parts by weight; the third monomer of the ethylene propylene diene monomer is liquid polybutadiene, the number-average molecular weight of the third monomer is 500-5000, and the content of the 1, 2-structure is greater than or equal to 80wt% based on the total weight of the liquid polybutadiene. The composition obviously reduces the dosage of the cross-linking agent, has excellent mechanical properties and processability without additionally adding an assistant cross-linking agent, and can be widely applied to the industries of household appliances, wires and cables, buildings, automobiles and the like.
Description
technical field [0001] The invention relates to the technical field of polymercomposite material production, in particular to a EPDM rubber / polypropylene thermoplasticelastomer composition, an EPDM rubber / polypropylene thermoplasticelastomer material and applications thereof. Background technique [0002] EPDM / PP thermoplastic elastomer material not only has the excellent physical and mechanical properties of elastomers, but also has the excellent processing characteristics of plastics. It is easy to form and process, and can be recycled and reused. It is energy-saving and environmentally friendly. With the continuous expansion of the application range of EPDM / PP thermoplastic elastomer materials, EPDM / PP thermoplastic elastomer materials are gradually replacing traditional thermosetting rubbers as "third-generation rubber". [0003] EPDM / PP thermoplastic elastomer is made of EPDM / PP through dynamic vulcanization process. At present, the industrialized vulcanization syste...
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