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A kind of processing method of polyisoprene solution

A polyisoprene and treatment method technology, which is applied in the field of polyisoprene solution treatment, can solve problems such as poor effects, and achieve the effects of low cost, less pollution, and easy operation

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, the effect of removing titanium metal in polymers is not good.

Method used

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  • A kind of processing method of polyisoprene solution
  • A kind of processing method of polyisoprene solution
  • A kind of processing method of polyisoprene solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Under the protection of nitrogen, add 1700g hexane, 350gIP to the 5L reactor, add TiCl 4 / triisobutylaluminum / diphenyl ether (the molar ratio of the three is 1.0:1.0:0.5) the hexane solution of the catalyst, the catalyst dosage is 1.0×10 -3 molTi / molIP, the monomer concentration is 17% by weight. React at 20°C for 2 hours to obtain a polymer solution containing an active catalyst with a polymer (polyisoprene) weight percentage of 15%.

[0056] At 60° C., 132.61 g of a 50% by weight sodium citrate aqueous solution was added to the above polymer solution, and 6.3 g of 10% by weight stabilizer 2,2'-methylenebis-(4- Methyl-6-tert-butylphenol) in hexane, stirred for 30 minutes.

[0057] Wash the above-mentioned polymer solution with 3L deionized water once; then let it stand for 30 minutes for oil-water separation; after decanting the water phase, strip the oil phase with steam and dry it in vacuum to obtain the catalyst and Stabilized polyisoprene.

[0058] The metal ti...

Embodiment 2

[0060]Under the protection of nitrogen, add 1980g hexane, 350gIP to the 5L reactor, add TiCl 4 / triisobutylaluminum / diphenyl ether (the molar ratio of the three is 1.0:1.0:0.5) the hexane solution of the catalyst, the catalyst dosage is 1.0×10 -3 molTi / molIP, the monomer concentration is 15% by weight. React at 20°C for 2 hours to obtain a polymer solution containing an active catalyst with a polymer (polyisoprene) weight percentage of 12%.

[0061] At 60°C, 787.23g of an aqueous solution of potassium citrate with a mass percent concentration of 1% by weight was added to the above polymer solution, and 8.75 g of a stabilizer N-phenyl-N'-cyclohexylterephthalene containing 20% ​​by weight was added. The amine solution in hexane was stirred for 30 minutes.

[0062] Wash the above-treated polymer solution with 3.5L deionized water for 3 times; then let it stand for 30 minutes to separate oil from water; after decanting the water phase, strip the oil phase with steam and dry it i...

Embodiment 3

[0065] Under the protection of nitrogen, add 2340g hexane, 350gIP into the 5L reactor, add TiCl 4 / triisobutylaluminum / diphenyl ether (the molar ratio of the three is 1.0:1.0:0.5) the hexane solution of the catalyst, the catalyst dosage is 1.0×10 -3 molTi / molIP, the monomer concentration is 13% by weight. React at 20°C for 2 hours to obtain a polymer solution containing an active catalyst with a polymer (polyisoprene) weight percentage of 10%.

[0066] At 60°C, add 212.19g of a 25% by weight sodium citrate aqueous solution to the above polymer solution, and add 9.8 g of 20% by weight of stabilizer N-phenyl-N'-isopropyl p-phenylene Diamine in hexane, stirred for 30 minutes.

[0067] Wash the above-treated polymer solution twice with 4.5L deionized water; then let it stand for 30 minutes to separate oil from water; after decanting the water phase, strip the oil phase with steam and dry it in vacuum to obtain and stabilized polyisoprene.

[0068] The metal titanium content in...

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Abstract

The invention discloses a method for processing a polyisoprene solution, which is used for stabilizing the polyisoprene solution synthesized in the presence of a catalyst. The solution contains the catalyst which is the product of interaction of halogenated titanium with an organic aluminum compound and an electron donor. The method is characterized in that the polyisoprene solution comes into contact with citric acid compounds so as to deactivate the catalyst in the solution, wherein the citric acid compound is one or more than one of citric acid, citrate and derivatives of citric acid. The method is very simple and convenient, is easy to operate, is low in cost, and can effectively lower the metal content of titanium in the separated polymer. In the step of catalyst deactivation, citric acid compounds substitute methyl alcohol and the like and moreover the pollution to the environment is reduced also.

Description

technical field [0001] The invention relates to a processing method of polyisoprene solution. Background technique [0002] According to its microstructure, polyisoprene can be divided into cis-1,4-polyisoprene, trans-1,4-polyisoprene, 3,4-polyisoprene and 1 , 2-polyisoprene. Among them, cis-1,4-polyisoprene is commonly known as isoprene rubber, and its microstructure is similar to natural rubber (such as Hevea, guayule). Isoprene rubber is widely used in the manufacture of tires and other rubber products, and is a major substitute for natural rubber. [0003] Many titanium-based Ziegler-Natta catalysts can be used for the synthesis of cis-1,4-polyisoprene. In industrial production, only TiCl is usually used 4 -AlR 3 and TiCl 4 - Two types of catalysts, polyiminoalanes. Typically, the coordination polymerization of isoprene is carried out as a solution polymerization. [0004] The physical and mechanical properties of cis-1,4-polyisoprene depend on the physical and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F36/08C08F6/02C08K5/13C08K5/18C08K5/101
Inventor 王超刘慧玲王雪李传清于国柱吕鹏飞
Owner CHINA PETROLEUM & CHEM CORP
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