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Novel silane coupler containing sulfur and nitrogen element

A technology of silane coupling agent and nitrogen element, which is applied in the field of new silane coupling agent and its preparation, can solve the problem of scorch of rubber compound, increase of Mooney viscosity, unfavorable dispersion of silica particles, and large porosity of rubber compound. and other problems, to achieve the effect of not easy rubber scorch, obvious coupling effect, and improving crosslinking density

Inactive Publication Date: 2007-05-30
贵州省材料技术创新基地 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the mixing temperature is higher than 160°C, the polysulfide bond of the polysulfide silane coupling agent will break, causing scorching of the rubber compound and increasing the Mooney viscosity, which is not conducive to the dispersion of silica particles in the rubber
The use of polysulfide silane coupling agent to modify silica also has disadvantages such as long mixing time, more than 3 to 6 stages of mixing, large porosity of the rubber material, and defective products due to scorch.

Method used

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  • Novel silane coupler containing sulfur and nitrogen element
  • Novel silane coupler containing sulfur and nitrogen element
  • Novel silane coupler containing sulfur and nitrogen element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for preparing novel silane coupling agent with ethyl isocyanate and mercaptomethyltrimethoxysilane as raw material:

[0026] Add 675ml of benzene into a round-bottomed three-neck flask equipped with a reflux condenser, a stirrer and a thermometer, add 0.5mol (35.5g) ethyl isocyanate to make a solution with a mass concentration of 5%, add 0.5mol (84g) mercaptomethanol Trimethoxysilane, 40mg triethylamine, controlled temperature at 40°C, reacted under mechanical stirring and reflux conditions for 24h, distilled the filtrate under reduced pressure to remove low-boiling fractions, and obtained a light yellow liquid product with a yield of 77.8%.

Embodiment 2

[0028] The method for preparing novel silane coupling agent with n-propyl isocyanate and β-mercaptoethyltrimethoxysilane as raw material:

[0029]Add 326ml of toluene into a round-bottomed three-neck flask equipped with a reflux condenser, a stirrer and a thermometer, add 0.5mol (42.5g) of n-propyl isocyanate to make a solution with a mass concentration of 10%, add 0.5mol (91g) of β -Mercaptoethyltrimethoxysilane, 460mg tri-n-propylamine, controlled temperature at 50°C, reacted under mechanical stirring and reflux conditions for 15h, distilled the filtrate under reduced pressure to remove low-boiling fractions, and obtained a light yellow liquid product with a yield of 85.3 %.

Embodiment 3

[0031] The method for preparing novel silane coupling agent with n-dodecyl isocyanate and gamma-mercaptopropyltrimethoxysilane as raw material:

[0032] Add 422ml of ethylbenzene into a round-bottomed three-neck flask equipped with a reflux condenser, a stirrer and a thermometer, add 0.5mol (105.5g) of n-dodecyl isocyanate to make a solution with a mass concentration of 20%, and then add 0.5mol (98g) γ-mercaptopropyltrimethoxysilane, 1.73g tri-n-butylamine, controlled temperature is 100°C, reacted under mechanical stirring and reflux conditions for 5h, and the filtrate was distilled under reduced pressure to remove low boiling point fractions to obtain light yellow Liquid product, yield 87.2%.

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Abstract

The invention discloses a new-typed silane coupling agent with sulphur and nitrogen element and making method, which is characterized by the following: reacting hydrocarbyl silane and alkyl monoisocyanates in the organic solvent with the molar rate at 1: 1 acted by tertiary amine catalyst; decompressing; distilling to make new-typed silane coupling agent with 1 thioamino formic ether structural units and 3 alkoxy groups; possessing higher heat stability and stronger coupling effect than traditional silane coupler; fitting for improving the synthetic property of sulfurized gel in the white carbon black rubber.

Description

technical field [0001] The invention relates to a novel silane coupling agent containing sulfur and nitrogen elements and a preparation method thereof. Background technique [0002] Carbon black is widely used as a main reinforcing agent in rubber compounds including tires, endowing vulcanized rubber with ideal mechanical properties. However, it is impossible to balance or improve the wear resistance, wet road traction and rolling resistance of tire tread rubber at the same time only by changing the grade and amount of carbon black. As a filler, silica has obvious advantages in terms of tread rubber wear resistance, wet road traction and rolling resistance. It is used as the main reinforcing agent for a new generation of low rolling resistance and low fuel consumption "green tires". Ultrafine particle silica reinforced vulcanizate has the advantages of low loss and wet skid resistance. [0003] The surface of silica particles contains a large number of silanol groups, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/10C08K9/06
Inventor 曾舒宋义虎郑强周明孙晋何敏刘一春李荣华胡智杨二钘
Owner 贵州省材料技术创新基地
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