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Polymer carrier loaded trans-1, 4-polyisoprene titanium catalyst and use method thereof

A technology of polyisoprene and titanium-based catalysts, which is applied in the field of trans-1,4-polyisoprene-titanium-based catalysts supported by polymer carriers, and can solve the problem of a single catalytic system

Active Publication Date: 2019-04-19
芜湖万隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It is estimated that 50% of polyethylene, 90% of polypropylene and almost all of TPI are catalyzed by the Ziegler-Natta catalytic system with magnesium chloride as the carrier, and the catalytic system is relatively simple.

Method used

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  • Polymer carrier loaded trans-1, 4-polyisoprene titanium catalyst and use method thereof
  • Polymer carrier loaded trans-1, 4-polyisoprene titanium catalyst and use method thereof
  • Polymer carrier loaded trans-1, 4-polyisoprene titanium catalyst and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1: the preparation of polystyrene (PS) seed

[0062] Add 10g of refined styrene, 22g of ethanol, 66g of ethylene glycol monomethyl ether, 0.1g of refined azobisisobutyronitrile and 2g of PVP-K30 into a 250mL all-necked Erlenmeyer flask, and seal it under argon protection; at 70°C , 80rpm, shake in a constant temperature water bath for 24h. After the reaction, the reaction solution was settled by centrifugation, the supernatant was removed, the precipitate was washed several times with ethanol and deionized water, and dried in vacuum to obtain PS seed microspheres with an average particle size of 4.81 μm and a viscosity-average molecular weight of 33,000. Make PS-1#.

Embodiment 2

[0063] Embodiment 2: the preparation of polystyrene (PS) seed

[0064] Add 10g of refined styrene, 44g of ethanol, 44g of ethylene glycol monomethyl ether, 0.1g of refined azobisisobutyronitrile and 2g of PVP-K30 into a 250mL all-necked Erlenmeyer flask, and seal it under argon protection; at 70°C , 80rpm, shake in a constant temperature water bath for 24h. After the reaction, the reaction solution was settled by centrifugation, the supernatant was removed, the precipitate was washed several times with ethanol and deionized water, and dried in vacuum to obtain PS seed microspheres with an average particle size of 1.93 μm and a viscosity-average molecular weight of 78,000. Make PS-2#.

Embodiment 3

[0065] Embodiment 3: the preparation of polystyrene (PS) seed

[0066] Add 10g of refined styrene, 66g of ethanol, 22g of ethylene glycol monomethyl ether, 0.1g of refined azobisisobutyronitrile and 2g of PVP-K30 into a 250mL all-necked Erlenmeyer flask, and seal it under argon protection; at 70°C , 80rpm, shake in a constant temperature water bath for 24h. After the reaction, the reaction solution was settled by centrifugation, the supernatant was removed, the precipitate was washed several times with ethanol and deionized water, and dried in vacuum to obtain PS seed microspheres with an average particle size of 1.65 μm and a viscosity-average molecular weight of 84,000. Make PS-3#.

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Abstract

Belonging to the technical field of catalysts, the invention provides a polymer carrier loaded trans-1, 4-polyisoprene titanium catalyst and a use method thereof. The catalyst comprises a main catalyst and a cocatalyst. The preparation method of the main catalyst includes: firstly reacting a metal-organic halogen compound with a carrier, then carrying out reaction with a halide of transition metaltitanium, and performing washing to obtain a loaded solid catalyst. The carrier is cyano functionalized monodisperse porous styrene-divinylbenzene copolymer microspheres. The cocatalyst is alkyl aluminum, has a general formula of AlRnX3-n, wherein R is hydrocarbonyl with a carbon atom number of 1-20, X is halogen atom, and n is greater than or equal to 1 and smaller than or equal to 3. The invention also provides a use method of the polymer carrier loaded trans-1, 4-polyisoprene titanium catalyst. The catalyst has more stable catalytic activity, and the obtained product has good form.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a polymer carrier loaded trans-1,4-polyisoprenyl titanium series catalyst and a use method thereof. Background technique [0002] Polyisoprene is a polymer of isoprene. Synthetic polyisoprene includes cis-1,4-polyisoprene (IR), trans-1,4-polyisoprene (TPI), cis-3,4-polyisoprene and 1,2-polyisoprene are four isomers, among which the first two structures have been effectively developed and utilized in industry. There are only cis-1,4-polyisoprene in nature, that is, natural rubber (NR), and trans-1,4-polyisoprene, that is, eucommia rubber (also known as Gutabo rubber, Barra tower rubber) two isomers. TPI and NR have exactly the same chemical composition, but its molecular chain is in the trans configuration. It is a crystalline polymer with high hardness and high tensile strength at room temperature, and is often used as a plastic. TPI crystallization is inhibited ...

Claims

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Application Information

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IPC IPC(8): C08F136/08C08F4/02
CPCC08F136/08C08F4/027
Inventor 周光远刘博聂赫然杨正军
Owner 芜湖万隆新材料有限公司
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