Sulfuric silane coupling agent and its synthesis process

A technology of sulfur-silane coupling agent and silane coupling agent, which is applied in the field of sulfur-containing silane coupling agent and its synthesis, can solve the problems of high mixing temperature, high porosity of rubber material, and scorch of rubber material, and achieve good Reinforcing performance, promoting dispersion, and not easy to burn the rubber

Inactive Publication Date: 2009-07-22
ZHEJIANG UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Si69 requires a high mixing temperature during use, which is easy to cause scorching of the rubber material, and has the disadvantage of high porosity of the rubber material. Therefore, it is necessary to strictly control the debinding temperature not higher than 160°C, and use 3-6 stages of mixing

Method used

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  • Sulfuric silane coupling agent and its synthesis process
  • Sulfuric silane coupling agent and its synthesis process
  • Sulfuric silane coupling agent and its synthesis process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a 100mL three-neck round bottom flask, under the protection of high-purity nitrogen, put 4.51g of potassium ethyl xanthate into it, and add 20mL of methanol to dissolve it. 4.65 g of trimethoxychlorosilane was dissolved in 20 mL of methanol, and the solution was added dropwise to the flask through a constant pressure funnel within 15 minutes. Raise the temperature to 65°C, reflux in methanol for 4 hours, cool to room temperature and stir for 12 hours, filter off the precipitated potassium chloride at the bottom of the bottle, distill off the solvent and unreacted raw materials, and then distill under reduced pressure to obtain 3.59 g of yellow liquid, which is The product has a molecular weight of 284 as detected by mass spectrometry.

Embodiment 2

[0022] In a 100mL three-neck round bottom flask, under the protection of high-purity nitrogen, put 3.76g of potassium ethyl xanthate into it, and add 15mL of methanol to dissolve it. 4.59 g of trimethoxychlorosilane was dissolved in 20 mL of methanol, and the solution was added dropwise to the flask through a constant pressure funnel within 15 minutes. Raise the temperature to 55°C, reflux in methanol for 8 hours, cool to room temperature and stir for 4 hours. After separation, 2.56 g of a yellow liquid is obtained, which is the product. The molecular weight is 284 as detected by mass spectrometry.

Embodiment 3

[0024] In a 100mL three-neck round bottom flask, under the protection of high-purity nitrogen, put 6.77g of potassium ethyl xanthate into it, and add 30mL of methanol to dissolve it. 4.71 g of trimethoxychlorosilane was dissolved in 20 mL of methanol, and the solution was added dropwise to the flask through a constant pressure funnel within 30 minutes. Heat up to 45°C, reflux in methanol for 12 hours, cool to room temperature and stir for 12 hours, filter off the precipitated potassium chloride at the bottom of the bottle, distill off the solvent and unreacted raw materials, and then distill under reduced pressure to obtain 3.96 g of yellow liquid, namely It is the product, and its molecular weight is 284 as detected by mass spectrometry.

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Abstract

The invention relates to a sulfur-containing silane coupling agent and a synthesis method thereof. In the case of using methanol as a solvent, chloropropyltrimethoxysilane is used as raw material 1, potassium ethyl xanthate is used as raw material 2, and under the protection of high-purity nitrogen, the target product is finally produced by the reaction, and its chemical name is xanthate propyl Trimethoxysilane. Xanthate propyltrimethoxysilane can treat inorganic fillers, especially for white carbon black filled rubber systems, which can significantly promote the dispersion of fillers in the matrix, so that fillers have good reinforcing properties. The coupling agent can be used for high-temperature mixing, and it is not easy to cause scorching of the rubber. The use of this new type of sulfur-containing silane coupling agent can be mixed at a higher temperature, so the mixing time or mixing times can be reduced, thereby reducing the production cost. The development of silane coupling agents has expanded the application of inorganic fillers in rubber. This new type of sulfur-containing silane coupling agent can be applied to a large number of inorganic powder fillers.

Description

technical field [0001] The invention relates to a silane coupling agent and a preparation method thereof, in particular to a sulfur-containing silane coupling agent and a synthesis method thereof. Background technique [0002] The use of coupling agent can endow many rubber and plastic products with many excellent comprehensive properties, such as: mechanical properties, electrical properties, water resistance, heat resistance, mildew resistance, etc. At present, silane coupling agents have been widely used in chemical industry, building materials, foundry, electronics and other industries. Since the 1990s, with the successful development of Michelin's fully filled silica "green tires", silica has been more widely used in the rubber industry. There are silicon hydroxyl groups on the surface of white carbon black, so it shows greater polarity, while the rubber matrix is ​​generally non-polar, and the compatibility between white carbon black and rubber is not good. In order ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18C08K5/5419C08L21/00
Inventor 方征平李瑞隽佟立芳许忠斌陈兴江鲁圣军古文全吉玉碧
Owner ZHEJIANG UNIV
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