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Process for preparing sulfur containing organosilane polymers

An organosilane and polymer technology, applied in the field of compositions and devices containing the same, can solve the problems of not providing branched sulfur-containing organosilane compounds and the like

Active Publication Date: 2021-03-02
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the method of US 4,384,132 does not provide the desired branched sulfur-containing organosilane compounds of the present invention

Method used

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  • Process for preparing sulfur containing organosilane polymers
  • Process for preparing sulfur containing organosilane polymers
  • Process for preparing sulfur containing organosilane polymers

Examples

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example 1

[0067] Synthesis of S-VTES: Copolymerization of Elemental Sulfur and Vinyltriethoxysilane (VTES)

[0068] Sulfur-containing copolymers were prepared via free-radical copolymerization of elemental sulfur and vinyltriethoxysilane.

[0069] In a typical experiment, a 250 mL three-necked round bottom flask equipped with a magnetic stirrer and condenser was charged with 10 g of sulfur, 0.07 g of tetraethylthiuram disulfide (TETD), 2.5 g of VTES, and 60 mL of p-xylene . The mass ratio between S and VTES is 4:1. The reaction mixture was heated up to 140 °C under argon atmosphere and a clear solution was obtained. Then it was stirred at 140° C. for 6 hours. After stirring, the reaction mixture was cooled to room temperature overnight, during which time unreacted sulfur began to precipitate. The reaction mixture was kept still for two more days to allow sulfur to precipitate. Use a pipette to separate the supernatant from unreacted sulfur. Finally, unreacted VTES and p-xylene w...

example 2

[0072] In this example, the reaction was performed in the same manner as in Example 1, only the amount of sulfur was 7.5 g, and VTES was 5 g, so the mass ratio S:VTES=1.5:1. The reaction product is called SVTES 2. The S content of this sample was 18.0 wt%.

example 3

[0074] In this example, the reaction was performed in the same manner as in Example 1, except that the amount of VTES was 15 g (therefore mass ratio S:VTES=1:1.5), TETD was 0.16 g and the solvent p-xylene was 120 mL. The reaction product is called SVTES 3. The S content of this sample was 21.6 wt%.

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Abstract

The present invention provides a process for preparing sulfur-containing branched organosilane polymers comprising: reacting sulfur with a vinyl silane compound in a solvent and in the presence of a catalytic amount of an accelerator at an elevated temperature of at least 40 oC. The process, and the organosilane polymers obtained by using the process, are very suitable for application in battery technologies.

Description

technical field [0001] The present disclosure relates to a process for the preparation of sulfur-containing organosilane polymers, novel sulfur-containing organosilane polymers, said sulfur-containing organosilane polymers in sulfur cement pre-compositions as well as surface modifiers and electrical energy storage devices Uses, as well as compositions and devices comprising the same. Background technique [0002] Various electrical energy storage devices are known in the art, such as lithium-sulfur and sodium-sulfur batteries. A recent article by A. Manthiram et al. (“Rechargeable Lithium-Sulfur batteries”, Chem. Rev. 2014, 114, pp. 11751-11787) explains that Li - The principle of S battery as well as historical development and technical challenges. An important technical challenge of current Li-S batteries is inter alia: the formation of unwanted long polysulfides soluble in common liquid electrolytes (which over time can lead to the loss of sulfur as cathode material and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/00C08G75/045
CPCC08G75/00C08G75/045Y02E60/10C08F230/085C08K3/06C08K5/40H01M10/3909
Inventor G·L·M·M·韦尔比斯特C·韦耶斯C·G·克里斯托娃-兹德拉夫科娃J·S·克利茨克A·戴科R·J·萨布隆
Owner SHELL INT RES MAATSCHAPPIJ BV