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Rare earth catalyst and preparation and application thereof

A rare earth catalyst and catalyst technology are applied to polyisoprene, rare earth catalyst and its preparation, application in butadiene-isoprene copolymer, and the field of preparing polybutadiene, achieving low cost and good prevention. Aging performance, effect of high catalytic activity

Pending Publication Date: 2021-12-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] U.S. Patent No. 4,434,313 discloses a zirconium tetrachloride / diethyl 2,4-di-tert-butyl-4-methoxyaluminum catalyst for ethylene oligomerization, but the catalyst can only catalyze ethylene polymerization to obtain a number average molecular weight 285 oil

Method used

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  • Rare earth catalyst and preparation and application thereof
  • Rare earth catalyst and preparation and application thereof
  • Rare earth catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Under the protection of nitrogen, add 10 mL of isopropoxy neodymium toluene solution with a concentration of 0.10 mol / L and 15 mmol of aluminum compound 1 into the catalyst preparation device, and then react at 30° C. for 120 min to obtain a rare earth catalyst.

[0036] Under nitrogen protection, in dry polymerization reactor, add 2L monomer concentration and be the butadiene hexane solution of 100g / L, then add above-mentioned rare earth catalyst, the mol ratio of Nd element and butadiene monomer in this catalyst is 1.0×10 -4 , reacted at 60° C. for 4 h, and then added 100 mL of ethanol to terminate the reaction to obtain polybutadiene.

Embodiment 2

[0038] Under the protection of nitrogen, add 10 mL of isopropoxy neodymium toluene solution with a concentration of 0.10 mol / L and 30 mmol of aluminum compound 1 into the catalyst preparation device, and react at 30° C. for 120 min to obtain a rare earth catalyst.

[0039] Under nitrogen protection, in dry polymerization reactor, add 2L monomer concentration and be the butadiene hexane solution of 100g / L, then add above-mentioned rare earth catalyst, the mol ratio of Nd element and butadiene monomer in this catalyst is 1.0×10 -4 , reacted at 60° C. for 4 h, and then added 100 mL of ethanol to terminate the reaction to obtain polybutadiene.

Embodiment 3

[0041] Under the protection of nitrogen, add 10 mL of isopropoxy neodymium toluene solution with a concentration of 0.10 mol / L and 30 mmol of aluminum compound 1 to the catalyst preparation device, react at 30°C for 120 min, and then add 1.0 mL of a solution with a concentration of 1.0 mol / L Chlorodiethylaluminum was reacted at 50°C for 1h to obtain a rare earth catalyst.

[0042] Under nitrogen protection, in dry polymerization reactor, add 2L monomer concentration and be the butadiene hexane solution of 100g / L, then add above-mentioned rare earth catalyst, the mol ratio of Nd element and butadiene monomer in this catalyst is 1.0×10 -4 , reacted at 60° C. for 4 h, and then added 100 mL of ethanol to terminate the reaction to obtain polybutadiene.

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Abstract

The invention provides a rare earth catalyst and a preparation method and application thereof. The rare earth catalyst comprises the following components: a rare earth compound, an aluminum compound, conjugated diene and a halogen-containing compound. The rare earth compound is selected from rare earth carboxylate, rare earth phosphate, an alkoxy rare earth compound or a rare earth chloride electron donor complex. The adopted aluminum compound is one of the compounds shown in the formula (1) or a mixture of the compound and alkyl aluminum or hydrogenated alkyl aluminum with the general formula of AlR3 or AlHR2. The molar ratio of the aluminum compound to the rare earth compound is (10-200): 1, and the molar ratio of the halogen compound to the rare earth compound is (0-5): 1. The invention provides a method for preparing conjugated diene polymers and copolymers. The rare earth catalyst has high catalytic activity and high cis-directionality when being used for conjugated diene polymerization and copolymerization, the polymer obtained by direct polymerization has better anti-aging performance, and an anti-aging agent does not need to be added after the polymerization is finished.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a rare earth catalyst and its preparation method and application, especially its application in the preparation of polybutadiene, polyisoprene and butadiene-isoprene copolymer. Background technique [0002] The polymerization of conjugated dienes catalyzed by rare earth catalysts has the characteristics of high activity and high cis-1,4 selectivity. Butadiene rubber prepared with rare earth catalysts can significantly improve wear resistance and fatigue resistance, reduce heat generation, prolong tire service life and save fuel to a certain extent when used in the preparation of tires. The structure and properties of rare earth isoprene rubber are the closest to natural rubber. It is called "synthetic natural rubber" and is widely used in tires, tapes and other rubber products. Rare earth catalysts catalyze the copolymerization of butadiene and isoprene, and the monomer units in...

Claims

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Application Information

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IPC IPC(8): C08F36/06C08F36/08C08F136/06C08F4/54
CPCC08F36/06C08F36/08C08F136/06C08F4/545
Inventor 周光远胡雁鸣于琦周
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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