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Ethylene propylene diene monomer and preparation method and application thereof

A EPDM rubber and ethylene technology, applied in the direction of rolling resistance optimization, road transportation emission reduction, etc., can solve the problems of unsuitable continuous vulcanization process, prone to scorch, high degree of cross-linking, high polymerization activity, improved The effect of scorch performance and high conversion rate

Pending Publication Date: 2022-08-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the EPDM rubber in the above-mentioned prior art is prone to scorching during the vulcanization process, and the degree of crosslinking in the early stage of vulcanization is relatively high, resulting in poor processability in the early stage and cannot be applied to the continuous vulcanization process.

Method used

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  • Ethylene propylene diene monomer and preparation method and application thereof
  • Ethylene propylene diene monomer and preparation method and application thereof
  • Ethylene propylene diene monomer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0053] In a 2-liter stainless steel stirred tank, under the protection of high-purity nitrogen, add 1000 ml of hexane, 1 mmol of ethyl trichloroacetate, and 2 mmol of sesquialuminum Al 2 (C 2 H 5 ) 3 Cl 3 , a certain amount of liquid butadiene-styrene oligomer A (molecular weight 2000, the content of styrene structural unit is 20wt%, the content of 1,2-structure in butadiene structural unit is 69wt%), 0.1mmol of VOCl 3 , the pressure of feeding the mixed gas reaches 0.6 MPa, the molar ratio of ethylene and propylene in the mixed gas is 1:5, the hydrogen content is 0.5 mol%, and the mixture is stirred and reacted at 10° C. for 15 minutes. After the polymerization, 1 ml of terminator ethanol and 1 ml of anti-aging agent 1076 (10wt% hexane solution) were added, and then coagulated and dried in a conventional manner to obtain EPDM-A1 to EPDM-A6 EPDM rubbers, GPC, NMR , DSC test, the results are shown in Table 1.

Embodiment 7

[0055] EPDM was prepared according to the method of Preparation Example 1, except that: in the liquid styrene-butadiene rubber oligomer, the content of 1,2-structure in the butadiene structural unit was different from that of Preparation Example 1, which was 85% by weight. Preparation of EPDM-A7.

Embodiment 8-12

[0065] EPDM was prepared according to the method of Example 1. The difference was that the polymerization conditions were different. EPDM-A8, EPDM-A9, EPDM-A10, EPDM-A11, EPDM-A12 were prepared. The polymerization conditions and the performance parameters of EPDM were shown in Table 2. Show.

[0066] Table 2

[0067]

[0068]

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Abstract

The invention relates to the field of synthetic rubber, and discloses an ethylene propylene diene monomer and a preparation method and application thereof. The ethylene propylene diene monomer takes a liquid butadiene-styrene oligomer as a third monomer, the number-average molecular weight of the liquid butadiene-styrene is 200-5000, the content of a styrene structural unit is 5-30 wt% on the basis of the total weight of the liquid butadiene-styrene, and the content of 1, 2-butadiene in the butadiene structural unit is greater than or equal to 65 wt%; on the basis of the total weight of the ethylene-propylene-diene monomer rubber, the content of the ethylene structural unit is 50-85 wt%, and the content of the third monomer structural unit is 0.5-10 wt%. The crosslinking rate in the early stage of vulcanization is low, the rubber material has excellent processability, the vulcanization rate is remarkably increased along with the increase of vulcanization time, the crosslinking degree of vulcanized rubber is high, and the obtained vulcanized rubber has excellent comprehensive performance. Due to the special vulcanization characteristic of the ethylene propylene diene monomer, the ethylene propylene diene monomer can be suitable for a continuous vulcanization production process.

Description

technical field [0001] The invention relates to the field of synthetic rubber, in particular, to a EPDM rubber and a preparation method and application thereof. Background technique [0002] Ethylene-propylene rubber is a copolymer of ethylene and propylene. A small amount of non-conjugated diene is introduced for the convenience of vulcanization. It is usually used as a thermosetting rubber or a thermoplastic elastomer composite material. It is widely used in household appliances, wires and cables, construction, automobiles and other industries. At present, EPDM rubber usually uses ethylidene norbornene ENB as the third monomer. [0003] Because ENB is expensive, and will greatly reduce the polymerization activity. To this end, CN101709105A discloses a ethylene-propylene-diene rubber with a diolefin liquid oligomer as the third monomer and a preparation method thereof. The mole fraction of combined propylene units in EPDM rubber is 20-45%, the third monomer is a diene liq...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/06C08F212/08C08F236/10C08L23/16
CPCC08F210/16C08L23/16C08L2207/04C08F210/06C08F212/08C08F236/10Y02T10/86
Inventor 徐一兵王超吕鹏飞姜科
Owner CHINA PETROLEUM & CHEM CORP
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