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Environment-friendly blocked mercaptosilane and mercaptosilane copolymer and preparation method thereof

A technology of mercaptosilane and mercaptopropyltriethoxysilane is applied in the field of environment-friendly end-capped mercaptosilane and mercaptosilane copolymer and its preparation, and can solve the problem of failure to achieve green environmental protection, large emission of volatile organic compounds, and glue The problem of early scorch phenomenon of materials can be improved, so as to improve the driving safety of automobiles, save energy, and improve the effect of early scorch phenomenon.

Pending Publication Date: 2022-04-29
JINGZHOU JIANGHAN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, during the use of 3-octanoylthio-1-propyltriethoxysilane coupling agent, a large amount of small ethanol molecules are released, which cannot meet the requirements of environmental protection
[0005] It can be seen from the above that the prior art has relatively large emissions of volatile organic compounds (VOCs), and there are technical problems such as early scorching of rubber materials.

Method used

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  • Environment-friendly blocked mercaptosilane and mercaptosilane copolymer and preparation method thereof
  • Environment-friendly blocked mercaptosilane and mercaptosilane copolymer and preparation method thereof
  • Environment-friendly blocked mercaptosilane and mercaptosilane copolymer and preparation method thereof

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Embodiment 1

[0035] The preparation method of an environment-friendly blocked mercaptosilane and mercaptosilane copolymer provided by the embodiment of the present invention includes:

[0036] Under a nitrogen atmosphere, drop into 182.3g (0.5mol) of 3-octanoylthio-1-propyltriethoxysilane in a 1000ml four-necked flask equipped with a magnetic stirrer, a condenser, a thermometer and a distillation device, 3 - Mercaptopropyltriethoxysilane 119.2g (0.5mol), 1,3-propanediol 213.1g (2.8mol) and isomeric tridecyl alcohol polyoxyethylene ether 84g (0.2mol), then add tetrabutyl titanate Catalyst 250 μl. Start the magnetic stirring and slowly raise the temperature. When the temperature reaches 100°C, start to pump negative pressure to make the vacuum in the system reach -0.095Mpa. The ethanol produced by the reaction is continuously distilled until there is no ethanol. The entire reaction time is about 5 hours.

[0037] After the reaction, a total of 138.2 g of ethanol was collected, which was con...

Embodiment 2

[0039] The preparation method of an environment-friendly blocked mercaptosilane and mercaptosilane copolymer provided by the embodiment of the present invention includes:

[0040] Under a nitrogen atmosphere, drop into 218.8g (0.6mol) of 3-octanoylthio-1-propyltriethoxysilane in a 1000ml four-necked flask equipped with a magnetic stirrer, a condenser, a thermometer and a distillation device, 3 - Mercaptopropyltriethoxysilane 95.4g (0.4mol), 1,3-propanediol 220.7g (2.9mol) and isomeric tridecyl alcohol polyoxyethylene ether 42g (0.1mol), then add tetrabutyl titanate Catalyst 260 μl. Start the magnetic stirring and slowly raise the temperature. When the temperature reaches 100°C, start to pump negative pressure to make the vacuum in the system reach -0.095Mpa. The ethanol produced by the reaction is continuously distilled until there is no ethanol. The entire reaction time is about 5 hours.

[0041] After the reaction, a total of 138.0 g of ethanol was collected, which was consis...

Embodiment 3

[0043] The preparation method of an environment-friendly blocked mercaptosilane and mercaptosilane copolymer provided by the embodiment of the present invention includes:

[0044] Under a nitrogen atmosphere, drop into 182.3g (0.5mol) of 3-octanoylthio-1-propyltriethoxysilane in a 1000ml four-necked flask equipped with a magnetic stirrer, a condenser, a thermometer and a distillation device, 3 - Mercaptopropyltriethoxysilane 119.2g (0.5mol), 1,3-propanediol 213.1g (2.8mol) and isomeric tridecyl alcohol polyoxyethylene ether 84g (0.2mol), then add tetrabutyl titanate Catalyst 250 μl. Start the magnetic stirring and slowly raise the temperature. When the temperature reaches 120°C, start to pump negative pressure to make the vacuum in the system reach -0.095Mpa. The ethanol produced by the reaction is continuously distilled until there is no ethanol. The entire reaction time is about 5 hours.

[0045] After the reaction, a total of 138.1 g of ethanol was collected, which was con...

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Abstract

The invention provides an environment-friendly blocked mercaptosilane and mercaptosilane copolymer and a preparation method thereof, and the method comprises the following steps: uniformly mixing 3-octanoylsulfur-1-propyltriethoxysilane, 3-mercaptopropyltriethoxysilane, organic dihydric alcohol, iso-tridecanol polyoxyethylene ether and a tetrabutyl titanate catalyst, adding a catalyst, and stirring to obtain a mixture; carrying out condensation reaction under the conditions that the temperature is 50-150 DEG C and the vacuum degree is-0.08 to-0.1 Mpa, so as to obtain a reaction crude product; and carrying out reduced pressure distillation on the reaction crude product to remove residual ethanol, and filtering to obtain the environment-friendly end-capped mercaptosilane and mercaptosilane copolymer product. The prepared terminated mercaptosilane and mercaptosilane copolymer has no ethyoxyl functional group in the molecular structure, so that the ethanol released in the tire manufacturing process is fundamentally eliminated, and the early scorching phenomenon of the rubber material is obviously improved.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, and more specifically relates to an environment-friendly blocked mercaptosilane and mercaptosilane copolymer and a preparation method thereof. Background technique [0002] As the world pays more and more attention to environmental issues, it is very important to reduce the emission of volatile organic compounds (VOCs) in the tire production process, and the market demand for green and low-VOCs sulfur-containing silane polymers will increase. . [0003] VP Si363 silane coupling agent is a mercaptosilane coupling agent with a special structure. The silane molecule consists of one ethoxy group and two polymerized long-chain substituents. The long-chain substituents are composed of polar polyoxyethylene moieties and non-polar The characteristic alkane moiety is composed as follows figure 1 shown. Klockmann et al [Rubber World, 2006, 234(5): 36-40] reported that VP Si363 silane coupling age...

Claims

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Application Information

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IPC IPC(8): C08G77/28C08G77/08C08L83/08B60C1/00
CPCC08G77/28C08G77/08C08L83/08B60C1/0016
Inventor 陈其王欣甘俊甘书官陈圣云
Owner JINGZHOU JIANGHAN FINE CHEM
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