Process for producing high cis-polybutadiene rubber

A polybutadiene rubber and production process technology, applied in the field of synthetic rubber industry, can solve the problems of high price of cyclohexane, complicated operation, high production cost, etc., and achieve low gel content, high conversion rate and long operation cycle Effect

Inactive Publication Date: 2005-07-06
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of cyclohexane is high, and the operation of usin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 100 parts of hydrogenated gasoline and 15 parts of butadiene into a 5L polymerization kettle, pass nitrogen gas to maintain pressure, start stirring, and pass hot water to preheat in the jacket. When the preheating temperature reaches 40°C, the aging solution of nickel naphthenate and triisobutylaluminum, and boron trifluoride·nonanol complex are sequentially added. Catalyst consumption Ni / Bd (molar ratio, the same below, Bd represents butadiene)=6.0×10 -5 , Al / Bd=3.6×10 -4 , boron trifluoride·nonanol complex / Bd=2.5×10-4, react for 3 hours, the monomer conversion rate is greater than 97%, and the highest polymerization temperature is 85°C. The glue is coagulated, and the product of the present invention is obtained after drying, and the gel content of the product is 0.02%. The results are shown in Table 2.

Embodiment 2

[0020] Ni / Bd=5.7×10 -5 , Al / Bd=4.3×10 -4 , boron trifluoride nonanol complex / Bd=3.5×10 -4 , the monomer conversion rate is 95%, and the highest polymerization temperature is 110°C. The gel content of the product is 0.03%. Other conditions are with embodiment 1.

Embodiment 3

[0022] Ni / Bd=5.1×10 -5 , Al / Bd=3.6×10 -4 , boron trifluoride nonanol complex / Bd=2.5×10 -4 , the monomer conversion rate is 95%, and the highest polymerization temperature is 110°C. The gel content of the product is 0.03%. Other conditions are with embodiment 1.

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Abstract

A production process of cis-rich polybutadiene is to polymerize 1,3-butadiene under the temperature of 40~120íµ in hydrogenated gasoline. The process is characterized in that the initiation system is composed of nickel naphthenate, triisobutylaluminum, boron trifluoride D complex, wherein, D is a C6~C18 alcohol, an ester composed of C2~C4 alkyl acid and C4~C6 alkyl alcohol, or a R3N tertiary amine substance wherein the R is a C4~C8 alkyl. By regulating the content of boron trifluoride D complex, a cis-rich polybutadiene with 25~100 Mooney viscosity, less than 0.05% gel can be synthesized. The cis-rich polybutadiene has improved processing properties and stress at definite elongation, lower Mooney viscosity by 10 Mooney unit than that of general cis-1,4-polybutadiene rubber BR900 with the same molecular weight. The invention has advantages of low energy consumption, simple operation, steady production, long running period, and high conversion rate.

Description

technical field [0001] The invention belongs to the synthetic rubber industry and relates to a process for producing butadiene rubber by polymerizing butadiene. Background technique [0002] Nickel-based general-purpose butadiene rubber is produced by polymerizing 1,3-butadiene under the action of a nickel-based catalyst in hydrogenated gasoline or hexane, cyclohexane, toluene, benzene and other solvents at a certain temperature. The nickel-based catalyst used in production is Ni-Al-B three-way catalyst, Ni refers to nickel naphthenate, nickel acetate, nickel octanoate and other nickel carboxylate salts, Al refers to triisobutylaluminum or triethylaluminum, B is Refers to boron trifluoride ether complex or boron trifluoride butyl ether complex. The butadiene rubber produced can be used to produce automobile tires, motorcycle tires, bicycle tires, rubber hoses, rubber soles, sealing rings, etc. It has a series of advantages such as high elastici...

Claims

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Application Information

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IPC IPC(8): C08F2/04C08F4/602C08F136/06
Inventor 丛悦鑫魏汝冰赵国训王晓敏张洪林王志勇
Owner CHINA PETROLEUM & CHEM CORP
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