Sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and preparation method thereof

A technology of isoprene rubber and rare earth catalyst, which is applied in the field of sulfonic acid rare earth catalyst, can solve the problems of long polymerization time and low catalytic efficiency, and achieve the effects of shortened polymerization time, simple preparation process and high molecular weight

Active Publication Date: 2011-09-28
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Abstract
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Problems solved by technology

The contents of the patents show that organic sulfonic acid rare earth catalysts can be used to catalyze the polymerization of isoprene, and the catalytic system appears as a simple binary component catalytic system; however, the catalysts mentioned in these two patents are effective in the polymerization of However, it still exhibits the disadvantages of low catalytic efficiency and long polymerization time

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  • Sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and preparation method thereof
  • Sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and preparation method thereof
  • Sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and preparation method thereof

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Embodiment 1-10

[0021] Embodiment 1-10: Neodymium benzenesulfonate / alcohol complex rare earth catalyst and its preparation method

Embodiment 1

[0022] Embodiment 1: Neodymium benzenesulfonate / ethanol complex rare earth catalyst and its preparation method

[0023] (1) Composition of neodymium benzenesulfonate / ethanol complex rare earth catalyst: the binary rare earth catalyst is composed of neodymium benzenesulfonate / ethanol complex and triisobutylaluminum; triisobutylaluminum and neodymium benzenesulfonate / ethanol The molar ratio of rare earth neodymium in the complex is 20:1.

[0024] (2) The method for preparing the rare earth catalyst of neodymium benzenesulfonate / ethanol complex: under the protection of nitrogen, in the catalyst preparation device through drying, add 1.0×10 -4 mol of neodymium benzenesulfonate / ethanol complex shown in Table 1 and 2.0×10 -3 mol triisobutylaluminum, the mol ratio of triisobutylaluminum to neodymium benzenesulfonate / ethanol complex is 20:1, after aging for 30 minutes at 60°C, the concentration obtained is 1.96×10 -4 mol / mL neodymium benzenesulfonate rare earth catalyst for the poly...

Embodiment 2-10

[0025] Embodiment 2-10: other conditions are the same as embodiment 1, only the neodymium benzenesulfonate / alcohol complex in embodiment 1 is changed into other neodymium benzenesulfonate / alcohol as shown in table 1 in embodiment 2-10 Class complexes.

[0026] Table 1 Alcohol compounds and neodymium benzenesulfonate as electron-donating ligands Formed complex structure

[0027]

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Abstract

The invention relates to a sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and a preparation method thereof. The catalyst comprises benzenesulfonic acid neodymium rare earth complex and alkyl aluminum; the molar ratio of the alkyl aluminum to the rare earth neodymium in the benzenesulfonic acid neodymium rare earth complex is 15 to 40:1, wherein the benzenesulfonic acid neodymium rare earth complex comprises benzenesulfonic acid neodymium alcohol complex, benzenesulfonic acid neodymium sulphoxide complex, benzenesulfonic acid neodymium furan complex, benzenesulfonic acid neodymium amine complex, benzenesulfonic acid neodymium ether complex and benzenesulfonic acid neodymium ester complex; ligand comprises: alcohol compound, sulfoxide compound, furan compound, aminecompound, ether compound and ester compound; and the alkyl aluminum comprises: 3-isobutyl aluminum, triethyl aluminum, diisobutyl aluminum hydride, or diethyl aluminum hydride. The sulfoacid rare earth complex catalyst is used for polymerizing isoprene, and can obtain the high-cis rare earth polyisoprene rubber with the cis 1,4 structure content more than 96.0 percent and the weight-average molecular weight more than 2.2 million.

Description

technical field [0001] The invention relates to a sulfonic acid rare earth catalyst for polymerizing high-cis isoprene rubber and a preparation method thereof. Background technique [0002] Since 1954, when the Ziegler-Natta catalyst was used to carry out the regular polymerization of isoprene to produce isoprene rubber, the production of polyisoprene in the world has developed rapidly, because natural rubber and polyisoprene rubber It has excellent fatigue resistance, wet skid resistance, good strength and composite bonding performance. Therefore, their main application field is reflected in the tire manufacturing industry. The demand for tires and performance requirements are getting higher and higher, but my country is located in the subtropical zone, and the output of natural rubber is extremely limited. Therefore, vigorously developing synthetic polyisoprene rubber is a difficulty and challenge that my country's synthetic rubber industry must actively face . Since the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F136/08C08F4/52
Inventor 蔡洪光张旭张学全代全权毕吉福张春雨那丽华范长亮贾翔宇
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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