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Branched polymer halide and preparation method thereof

A branched polymer and halide technology, which is applied in the field of branched polymer halides and their preparation, can solve problems such as poor processability, achieve good processability, improve processability and vulcanization performance

Active Publication Date: 2015-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the poor processability of existing commercialized brominated isobutylene and p-methylstyrene copolymers, to provide a structure unit containing monoolefins and a structure formed by alkylstyrene A halide of a branched polymer of the unit and a preparation method thereof, through which the molecular weight and distribution of the copolymer can be effectively adjusted and controlled, so that the halide of the branched polymer has good processability and vulcanization performance

Method used

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  • Branched polymer halide and preparation method thereof
  • Branched polymer halide and preparation method thereof
  • Branched polymer halide and preparation method thereof

Examples

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Effect test

Embodiment 1

[0104] (1) In a 1000mL glass three-necked flask equipped with a powerful constant-speed stirring device, add 484g of monochloromethane, 66g of isobutylene, and 4.97g of methylstyrene at a temperature of -80°C in sequence (based on the total amount of the methylstyrene As a standard, the content of p-methylstyrene is 98% by weight, the content of m-methylstyrene is 2% by weight) and 0.09g of 4-vinylbenzyl chloride, mixed uniformly, and cooled to -95°C. Add dropwise a dichloromethane solution containing 0.38 mmol of ethylaluminum dichloride (EADC) to the monomer solution, use liquid nitrogen to control the temperature, and at the same time control the drop rate of the dichloromethane solution of ethylaluminum dichloride to maintain the polymerization temperature Between -90°C and -100°C. After the dropwise addition, the reaction was continued for 10 minutes, then pre-cooled methanol containing 0.5% by weight of sodium hydroxide was added to terminate the polymerization, the reac...

Embodiment 2

[0107] (1) In a 1000mL glass reactor equipped with a powerful constant-speed stirring device, add 484g of methylene chloride, 66g of isobutylene, and 4.21g of methylstyrene at a temperature of -80°C in sequence (among them, the amount of methylstyrene Based on the total amount, the content of p-methylstyrene is 98% by weight, the content of m-methylstyrene is 2% by weight) and 0.10g of 4-vinylbenzyl chloride, mixed uniformly, and cooled to -95°C. Add dropwise the methylene chloride solution containing 0.42mmol ethyl aluminum dichloride in the monomer solution, use liquid nitrogen to control the temperature, and control the rate of addition of the ethyl aluminum dichloride solution in dichloromethane to maintain the temperature of the polymerization reaction at - Between 90°C and -100°C. After the dropwise addition, the reaction was continued for 10 minutes, then pre-cooled methanol containing 0.5% by weight of sodium hydroxide was added to terminate the polymerization, the rea...

Embodiment 3

[0110] (1) In a 1000mL glass reactor equipped with a powerful constant-speed stirring device, add 484g of methylene chloride, 66g of isobutylene, and 3.47g of methylstyrene at a temperature of -80°C in sequence (among them, the amount of methylstyrene Based on the total amount, the content of p-methylstyrene is 98% by weight, the content of m-methylstyrene is 2% by weight) and 0.14g of 4-vinylbenzyl chloride, mixed uniformly, and cooled to -95°C. Add dropwise a dichloromethane solution containing 0.45 mmol ethylaluminum dichloride to the monomer solution, use liquid nitrogen to control the temperature, and simultaneously control the rate of addition of the dichloromethane solution of ethylaluminum dichloride to maintain the polymerization temperature at -90 ℃ to -100℃. After the dropwise addition, the reaction was continued for 10 minutes, then pre-cooled methanol containing 0.5% by weight of sodium hydroxide was added to terminate the polymerization, the reaction solvent was ...

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Abstract

The invention discloses a branched polymer halide and a preparation method thereof. The branched polymer halide comprises a branched polymer and halogen atoms substituting parts of hydrogen atoms in the molecular structure of the branched polymer, and the branched polymer contains at least one structure unit represented by formula I, at least one structure unit represented by formula II, and at least one branched structure unit represented by formula III. The branched polymer halide has high molecular weight and wide molecular weight distribution, so the halide has good processing performances, can be individually used, and can also be added to halides of isobutene and p-methylphenylene linear copolymer as a modifier in order to improve the processing performance and the sulfuration performance of the isobutene and p-methylphenylene linear copolymer.

Description

technical field [0001] The invention relates to a halide compound of branched polymer and a preparation method thereof. Background technique [0002] US5162445 discloses a copolymer of isobutylene and p-methylstyrene and its halides. Practical applications have shown that brominated isobutylene and p-methylstyrene copolymers have better comprehensive properties than brominated butyl rubber due to the fully saturated structure of the main molecular chain, especially better heat resistance; and, Due to the presence of highly active benzyl bromide functional groups, it can achieve vulcanization and co-vulcanization with various rubbers in a wider range, and also has a wider range of modification advantages. The product is blended with nylon to make a dynamic vulcanized alloy for the production of the inner liner of the tire. It can be made light and thin, which is nearly 80% lighter than the traditional halogenated butyl rubber, while the air permeability is lower than the ori...

Claims

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Application Information

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IPC IPC(8): C08F210/10C08F212/12C08F212/14C08F8/22
Inventor 张月红齐海英龚惠勤邱迎昕张雷周新钦
Owner CHINA PETROLEUM & CHEM CORP
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