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A kind of preparation method of chlorinated butyl damping rubber containing modified montmorillonite damping agent

A technology of chlorinated butyl and damping rubber, which is applied in the field of preparation of modified montmorillonite materials, can solve the problems of insignificant energy dissipation effect of composite materials, consumption of hydroxyl groups, and incomplete use of hydrogen bond effects.

Active Publication Date: 2017-07-04
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of studies have shown that the addition of nano-clay improves the mechanical properties such as tensile strength and elongation at break of the composite material, but has no significant effect on the energy dissipation of the composite material. Therefore, it is necessary to modify its structure to improve its damping reduction. Vibration ability
Wang Jincheng et al prepared a new type of dendritic damping agent by dendritic polymer preparation technology (Wang Jincheng, Hao Wenli, Zhao Yi, Pan Xinchen, Guo Xi, Dong Xingyu, A dendritic damping agent and its preparation method and application, ZL201110347024.0 ), although the damping effect is good, but in this technology, hydrogen-containing silane and hydroxyl groups on hindered phenols are used for grafting reaction, which consumes part of the hydroxyl groups, resulting in the incomplete hydrogen bond effect of improving the damping effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 10g of inorganic montmorillonite, 0.2mol of hydrogen-containing polysiloxane and 10mL of ethanol into a three-neck flask, and the mixture is heated at 70°C under nitrogen 2 Under the condition of stirring for 40min, and keep 6h, then vacuum to remove ethanol, to obtain organically modified montmorillonite. Weigh 10g of 4-allyl-2,6-dimethoxyphenol, 80g of tetrahydrofuran and 0.2g of n-butyllithium in a four-necked flask, under N 2 Under protection, stir vigorously at -70°C for 1 hour. Then, it was reacted with 10 g of trimethylchlorosilane at 40° C. for 4 hours. The product was washed with methanol, precipitated by centrifugation, and dried in vacuum for 4 hours to obtain 4-allyl-2,6-dimethoxyanisole. Weigh 50g of organically modified montmorillonite, 40g of 4-allyl-2,6-dimethoxyanisole and 0.3g of iron in a four-necked flask. 2 Under protection, stir vigorously at 100°C for 3 hours, then vacuumize to remove unreacted substances, wash the product with methanol, ce...

Embodiment 2

[0042] Add 15g of inorganic montmorillonite, 0.3mol of hydrogen-containing polysiloxane and 15mL of ethanol into a three-neck flask, and the mixture is heated at 80°C under nitrogen 2 Under the condition of stirring for 35min, and kept for 5h, then vacuumed to remove ethanol, to obtain organically modified montmorillonite. Weigh 15g of 4-allyl-2,6-dimethoxyphenol, 90g of tetrahydrofuran and 0.3g of n-butyllithium in a four-necked flask, under N 2 Under protection, stir vigorously at -75°C for 2 hours. Then, it was reacted with 15 g of trimethylchlorosilane at 50° C. for 3 hours. The product was washed with methanol, precipitated by centrifugation, and dried in vacuum for 4.5 hours to obtain 4-allyl-2,6-dimethoxyanisole. Weigh 65g of organically modified montmorillonite, 50g of 4-allyl-2,6-dimethoxyanisole and 0.4g of cobalt in a four-necked flask. 2 Under protection, stir vigorously at 110°C for 4 hours, then vacuumize to remove unreacted substances, wash the product with m...

Embodiment 3

[0046] Add 20g of inorganic montmorillonite, 0.4mol of hydrogen-containing polysiloxane and 20mL of ethanol into a three-neck flask, and the mixture is heated at 90°C under nitrogen 2 Under the condition of stirring for 30min, and kept for 4h, then vacuumed to remove ethanol, to obtain organically modified montmorillonite. Weigh 20g of 4-allyl-2,6-dimethoxyphenol, 100g of tetrahydrofuran and 0.4g of n-butyllithium in a four-necked flask, under N 2 Under protection, stir vigorously at -80°C for 3 hours. Then, it was reacted with 20 g of trimethylchlorosilane at 60° C. for 2 hours. The product was washed with methanol, precipitated by centrifugation, and dried in vacuum for 5 hours to obtain 4-allyl-2,6-dimethoxyanisole. Weigh 80g of organically modified montmorillonite, 60g of 4-allyl-2,6-dimethoxyanisole and 0.5g of nickel in a four-necked flask. 2 Under protection, stir vigorously at 120°C for 3 hours, then vacuumize to remove unreacted substances, wash the product with me...

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PUM

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Abstract

The invention relates to a preparation method for chlorinated butyl damping rubber containing a modified montmorillonite damping agent. The preparation method comprises the following five steps: preparation of organic modified montmorillonite; hydroxyl group protection of 4-allyl-2,6-dimethoxyphenol; preparation of 4-allyl-2,6-dimethoxyanisole modified montmorillonite; elimination of hydroxyl group protection of4-allyl-2,6-dimethoxyanisole modified organic montmorillonite; and preparation of the chlorinated butyl damping rubber containing the modified montmorillonite damping agent. Compared with the prior art, the preparation method provided by the invention improves the damping vibration attenuation effect of a rubber material. The preparation method is economic, practical and simple, has low cost, can easily realize large-scale production and has practicality.

Description

technical field [0001] The invention relates to a preparation method of a modified montmorillonite material, in particular to a preparation method of a chlorinated butyl damping rubber containing a modified montmorillonite damping agent. Background technique [0002] Vehicles and other vehicles widely use damping materials in the process of damping vibration. During the damping process, high damping materials are attached to the surface of the relevant structural parts. The mechanical energy is dissipated through the internal structure of the damping material, so as to achieve the purpose of vibration reduction and reduce noise to a certain extent. The vibration and noise generated during the operation of automobiles and other vehicles not only accelerates the fatigue damage of related parts inside the automobile, shortens its service life, but also pollutes the urban environment and endangers human health to a certain extent. Therefore, it is very important to develop che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08K13/06C08K9/08C08K9/04C08K3/34C08K3/22
CPCC08K3/22C08K3/346C08K9/04C08K9/08C08K13/06C08K2003/2296C08L23/283
Inventor 王锦成曹付海杨思远李茹梦
Owner SHANGHAI UNIV OF ENG SCI
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