A kind of preparation method of solution method silane grafting modified EPDM rubber

A technology of graft modification of EPDM rubber, which is applied in the field of preparation of EPDM graft modified EPDM rubber by solution method, can solve the problems of high synthesis cost, slow vulcanization speed of EPDM rubber, long branch Chain EPDM silane graft modification and other issues

Inactive Publication Date: 2018-06-22
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these third monomers have disadvantages, such as the high synthesis cost of ENB and 1,4-HD, and the slow vulcanization rate of DCPD type EPDM rubber (Liu C. Progress on the third and the forth monomers in EPR[J]. Petrochemical Industry Technology, 2006, 13(2): 52-55)
At present, there is no report on the graft modification of long-chain branched EPDM silane with polybutadiene as the third monomer with a certain 1,2-structure content, and there is no report on the modified polybutadiene with a certain 1,2-structure content. A report on polybutadiene as long chain branched technical index

Method used

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  • A kind of preparation method of solution method silane grafting modified EPDM rubber

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Experimental program
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Effect test

Embodiment 1

[0018] Put 15g EPDM and 200ml cyclohexane into a 500ml three-necked flask, keep the temperature at 65°C, after EPDM is completely dissolved, raise the temperature to 85°C, slowly add 3.2g triethylsilane (Et3SiH), 0.6g acetanilide The cyclohexane solution, after the dropwise addition, stirred for 5 minutes, slowly added 3.2g of rhodium trichloride (RhCl(PPh3)3) into the three-necked flask within 20 minutes, and continued to react at constant temperature for 2 hours, and the reaction ended Finally, the product was poured out, added with anhydrous methanol for precipitation, settled for a period of time, filtered with suction, extracted with acetone for 12 hours, and dried in a 25°C oven for 12 hours under vacuum to obtain a transparent viscous solid product.

Embodiment 2

[0020] Put 15g EPDM and 200ml cyclohexane into a 500ml three-necked bottle, keep the temperature at 65°C, after the EPDM is completely dissolved, raise the temperature to 85°C, slowly add 1.8g triethylsilane (Et3SiH), 0.3g acetanilide After the dropwise addition, stir for 5 minutes, slowly drop 1.8 g of rhodium trichloride (RhCl(PPh3)3) into the there-necked flask within 20 minutes, continue to react at constant temperature for 2 hours, and the reaction ends Finally, the product was poured out, added with anhydrous methanol for precipitation, settled for a period of time, filtered with suction, extracted with acetone for 12 hours, and dried in a 25°C oven for 12 hours under vacuum to obtain a transparent viscous solid product.

Embodiment 3

[0022] Put 10g EPDM and 200ml cyclohexane into a 500ml three-necked bottle, keep the temperature at 65°C, after the EPDM is completely dissolved, raise the temperature to 85°C, slowly add 3.2g triethylsilane (Et3SiH), 0.6g acetanilide The cyclohexane solution, after the dropwise addition, stirred for 5 minutes, slowly added 3.2g of rhodium trichloride (RhCl(PPh3)3) into the three-necked flask within 20 minutes, and continued to react at constant temperature for 2 hours, and the reaction ended Finally, the product was poured out, added with anhydrous methanol for precipitation, settled for a period of time, filtered with suction, extracted with acetone for 12 hours, and dried in a 25°C oven for 12 hours under vacuum to obtain a transparent viscous solid product.

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Abstract

A method for preparing ethylene-propylene-diene rubber modified by silane grafting in a solution method relates to a method for preparing rubber. Preparation. A new type of silane-grafted EPDM was prepared by solution reaction grafting, and reactive silane groups were grafted at the double bonds on the long chain branches of EPDM macromolecules. The introduction of silane groups changed the polarity of EPDM, thus endowing EPDM with a certain Some new special properties, such as improving heat resistance, fatigue resistance, aging resistance, solvent resistance and processing performance. The novel EPDM modified by silane grafting prepared by the present invention can improve the compatibility with inorganic fillers such as white carbon black, improve the dispersion effect of inorganic fillers such as white carbon black in EPDM, and can also be used for other rubber materials and white carbon Compatibilizer for inorganic fillers such as black.

Description

technical field [0001] The invention relates to a method for preparing rubber, in particular to a method for preparing ethylene-propylene-diene rubber modified by solution method silane grafting. Background technique [0002] Ethylene-propylene-diene rubber (EPDM) is a polymer obtained by copolymerization of ethylene, propylene and non-conjugated diene (MitraS, Jorgensen M, Pedersen W B, et al. Structural determination of ethylene-propylene-diene rubber (EPDM) containing high degree of controlled long-chain branching [J]. J. Appl. Polym. Sci., 2009, 113: 2962-2972). In order to quickly vulcanize EPDM rubber, ethylidene norbornene (ENB), dicyclopentadiene (DCPD) or 1,4-hexadiene (1,4-HD) are usually used as the third monomer (Huang Baotong , Ouyang Jun. Complex Catalyzed Polymerization Synthetic Rubber[M]. Beijing: Science Press, 1981: 314-318). Compared with other rubber products, EPDM has the following advantages: 1. The main chain does not contain double bonds and is com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/42C08F210/18
CPCC08F8/42C08F210/18
Inventor 何晓峰高瑞横刘重阳褚旭亢萍葛铁军
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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