Method of preparing ethylen-propylene rubber graft polymers

A technology of grafted polymers and ethylene-propylene rubber, applied in the field of polymer chemistry, can solve the problems of many side reactions, easy cross-linking, uncontrollable polymer chain structure, etc., and achieve polymerization degree and structure control, coupling reaction side effects Less reaction, overcoming the effect that the initiator is difficult to remove

Inactive Publication Date: 2008-12-31
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
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Problems solved by technology

[0003] Document 1 (Sheng J, Hu J. Journal of Applied Polymer Science, 1996, 60: 1499-1503) uses BPO or azobisisobutyronitrile (AIBN) as an initiator for solution grafting reaction to prepare EPDM rubber (EPDM)-g-styrene (St) graft copolymer, the problem of free radical polymerization is that the polymer chain structure is uncontrollable and easy to crosslink
At the same time, the reaction of indene and chlorinated ethylene-propylene copolymer at 0°C was studied, and it was found that when reacting with 10% chlorine-containing ethylene-propylene copolymer, the solvent was pure methylene chloride, and a cross-linked product would be obtained, with side reactions more

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  • Method of preparing ethylen-propylene rubber graft polymers
  • Method of preparing ethylen-propylene rubber graft polymers
  • Method of preparing ethylen-propylene rubber graft polymers

Examples

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Effect test

Embodiment 1

[0021] Nitrogen gas-vacuumization-gas lamp baking bottle-nitrogen gas, repeat this 3 times, and continue to nitrogen gas to maintain positive pressure in the reaction bottle. Add 0.6072g of chlorinated binary ethylene propylene rubber with a chlorine content (percentage by weight) of 12.5% ​​and 25ml of hexanaphthene to the polymerization bottle under nitrogen protection with a pouring tube, keep positive pressure in the bottle, stir and dissolve for two days. Two days after dissolving, under the protection of nitrogen, pour the cyclohexane solution of chlorinated ethylene propylene diene rubber into another polymerization bottle with molecular sieves, pumping, baking, and filling with nitrogen three times, and let it dry for one day for later use.

[0022] Nitrogen gas-vacuumization-gas lamp baking bottle-nitrogen gas, repeat this 3 times, and continue to nitrogen gas to maintain positive pressure in the reaction bottle. Add 30 ml of cyclohexane into the reactor with a pourin...

Embodiment 2

[0026] Nitrogen gas-vacuumization-gas lamp baking bottle-nitrogen gas, repeat this 3 times, and continue to nitrogen gas to maintain positive pressure in the reaction bottle. Add 0.5944g of chlorinated binary ethylene propylene rubber with a chlorine content (percentage by weight) of 5.4% and 25ml of hexanaphthene to the polymerization bottle under nitrogen protection with a pouring tube, keep positive pressure in the bottle, stir and dissolve for two days. Two days after dissolving, under the protection of nitrogen, pour the cyclohexane solution of chlorinated ethylene propylene diene rubber into another polymerization bottle with molecular sieves, pumping, baking, and filling with nitrogen three times, and let it dry for one day for later use.

[0027] Nitrogen gas-vacuumization-gas lamp baking bottle-nitrogen gas, repeat this 3 times, and continue to nitrogen gas to maintain positive pressure in the reaction bottle. Add 25ml of cyclohexane into the reactor with a pouring tu...

Embodiment 3

[0031] Nitrogen gas-vacuumization-gas lamp baking bottle-nitrogen gas, repeat this 3 times, and continue to nitrogen gas to maintain positive pressure in the reaction bottle. Add 0.6106g of chlorinated binary ethylene propylene rubber with a chlorine content (percentage by weight) of 5.4% and 25ml of hexanaphthene to the polymerization bottle under nitrogen protection with a pouring tube, keep positive pressure in the bottle, stir and dissolve for two days. Two days after dissolving, under the protection of nitrogen, pour the cyclohexane solution of chlorinated ethylene propylene diene rubber into another polymerization bottle with molecular sieves, pumping, baking, and filling with nitrogen three times, and let it dry for one day for later use.

[0032] Nitrogen gas-vacuumization-gas lamp baking bottle-nitrogen gas, repeat this 3 times, and continue to nitrogen gas to maintain positive pressure in the reaction bottle. Add 25ml of cyclohexane into the reactor with a pouring tu...

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Abstract

A preparation method of ethylene-propylene rubber grafted polymer belongs to polymer chemistry. The reports of existing literature are mostly the use of free radical synthesis to prepare this grafted polymer, which structure is uncontrollable and easy to crosslink. This invention steps: the first step: cyclohexane solution is use as the solvent to prepare chloride binary ethylene-propylene rubber solution. Second step: The activie anionic polymerization method is used to prepare the active polystyrene with butyl lithium as initiator in cyclohexane solution. Third step: the active polyphenylene and chloride binary ethylene-propylene rubber are coupled in alcohol-LN bath form -40 to -78deg.C to prepare ethylene-propylene rubber grafted polymer, and the reaction time is 24 to 48 hours.

Description

technical field [0001] The invention belongs to the field of macromolecular chemistry, in particular to the composition of C08L macromolecular compounds. Background technique [0002] The methods of graft copolymerization of ethylene propylene rubber mainly include free radical grafting, active free radical grafting, and cationic grafting, and most of them are graft copolymerization of EPDM rubber and graft copolymerization of binary ethylene propylene rubber. Research is rare. [0003] Document 1 (Sheng J, Hu J. Journal of Applied Polymer Science, 1996, 60: 1499-1503) uses BPO or azobisisobutyronitrile (AIBN) as an initiator for solution grafting reaction to prepare EPDM rubber (EPDM)-g-styrene (St) graft copolymer, the problem of free radical polymerization is that the polymer chain structure is uncontrollable and easy to cross-link. Document 2 (Xiao-song Wang, NingLuo, Sheng-kang Ying.Polymer, 1999, 40:4515-4520) prepared ethylene-propylene-diene rubber (EPDM)-g-methyl ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F299/00C08F210/16C08F212/08
Inventor 张倩赵自强郗向丽石艳付志峰
Owner BEIJING UNIV OF CHEM TECH
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