Decolorization method of ketoxime type silane crosslinking agent

A technology of silane cross-linking agent and ketoxime-based silane, which is applied in the field of decolorization of ketoxime-type silane cross-linking agent, can solve the problems of large amount of attapulgite clay addition, increased ketoxime content, and large material loss, so as to improve the use value , prevent chroma from deepening, and reduce the effect of solid waste discharge

Active Publication Date: 2019-01-01
江苏艾科维科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Due to the particularity of ketoxime silane (see water decomposition), conventional carbon-based adsorption materials (such as activated carbon) have no decolorization function for it, so it needs to be selected among silicon-containing adsorption materials. Attapulgite clay is an excellent adsorption material. , low price, good decolorization effect, although the attapulgite clay after conventional activation treatment can decolorize ketoxime-type silane, it will cause the ketoxime content in the ketoxime-type silane product to increase, and lead to a large amount of attapulgite clay added (dosage ratio of at least 5%, and can only be used once), more solid waste is produced, and the decolorized solid slag usually produced can only be treated as hazardous waste, which has a great impact on the environment and has the disadvantage of large material loss

Method used

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  • Decolorization method of ketoxime type silane crosslinking agent
  • Decolorization method of ketoxime type silane crosslinking agent
  • Decolorization method of ketoxime type silane crosslinking agent

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Effect test

Embodiment 1-1

[0048] Embodiment 1-1, a method for decolorizing a ketoxime type silane crosslinking agent, the following steps are carried out in sequence:

[0049] 1) Modification of attapulgite clay:

[0050] ①. Take 100 grams of 200-mesh decolorized attapulgite clay, add 200 milliliters of methyl tributylketoxime silane (platinum cobalt color number ≤ 100) for immersion treatment for 60 minutes, and obtain a decolorized attapulgite clay / ketoxime silane mixture;

[0051] ②. Add 100ml of water to the mixture of decolorized attapulgite clay / ketoximosilane for dispersion, stir at room temperature for 30 minutes, then filter, wash the filter cake I (use 500ml of water for washing), and then dry it at 100°C for 60 to 120 minutes , and then roasted at 330°C for 2 hours to obtain the modified decolorized attapulgite clay, which was left to cool naturally in a desiccator for later use.

[0052] 2), decolorization:

[0053] The modified decolorized attapulgite clay is passed through a 200-mesh si...

Embodiment 1-2

[0054] Embodiment 1-2, a kind of decolorization method of ketoxime type silane crosslinking agent:

[0055] 1), replace the decolorized attapulgite clay / ketoximosilane mixture in Example 1-1 step 1) ① with the filter cake II obtained by filtering in Example 1-1 step 2); the rest of the content is the same as in Example 1-1 Step 1)②, so as to achieve the first repeated use of the modified decolorized attapulgite clay (that is, the total number of uses of the modified decolorized attapulgite clay is 2 times).

[0056] 2), the modified decolorized attapulgite clay obtained in the above steps is decolorized according to step 2) of Example 1 to obtain low chroma ketoximosilane.

Embodiment 1-3

[0057] Embodiment 1-3, a kind of decolorization method of ketoxime type silane crosslinking agent:

[0058] 1), replace the decolorized attapulgite clay / ketoximosilane mixture in Example 1-1 step 1) ① with the filter cake II obtained by filtering in Example 1-2 step 2); the rest of the content is the same as in Example 1-1 Step 1)②, thereby realizing the second repeated use of the modified decolorized attapulgite clay (that is, the total number of uses of the modified decolorized attapulgite clay is 3 times).

[0059] 2), the modified decolorized attapulgite clay obtained in the above steps is decolorized according to step 2) of Example 1 to obtain low chroma ketoximosilane.

[0060] The color number and gas chromatographic analysis components of methyl tributylketoxime silane after the treatment of the above-mentioned Examples 1-1 to 1-3 are as described in Table 1.

[0061] Table 1

[0062]

[0063] instruction manual:

[0064] For the methyl tributylketoxime silane us...

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Abstract

The invention discloses a decolorizing method for a ketoxime type silane crosslinking agent. The decolorizing method comprises the following steps: (1) modification of decolorized attapulgite clay: dipping the decolorized attapulgite clay with ketoxime-based silane, adding water in the decolorized attapulgite clay for dispersing treatment, filtering, washing a filter cake I, and roasting and activating the filter cake I to obtain modified decolorized attapulgite clay; and (2) decolorizing: sieving the modified decolorized attapulgite clay, dispersing the sieved modified decolorized attapulgite clay in high-chroma ketoxime-based silane to be treated, stirring for 0.5-3 hours at constant temperature, and filtering to obtain filtrate which is low-chroma ketoxime-based silane.

Description

technical field [0001] The invention relates to the field of chemical engineering, in particular to a method for decolorizing a ketoxime type silane crosslinking agent. Background technique [0002] Ketoxime silane is a common organosilicon crosslinking agent and an important fine chemical product, mainly used in the production of RTV oxime one-component room temperature vulcanized silicone rubber. The room temperature vulcanized silicone rubber using this product as a curing agent not only has the excellent properties of general one-component silicone sealants, but also has odorless, non-toxic, non-corrosive properties, and is compatible with iron, glass, ceramics, aluminum alloys, etc. All have high bonding strength and are widely used in electronics, construction, automobile and other industries. [0003] Due to the existence of C=N-O in the compound, the ketoxime silane is unstable under the influence of high temperature, light and impurities, resulting in a darker colo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/10C07F7/20
CPCC07F7/0892C07F7/20
Inventor 邵寿强汪俊杰罗晟刘毅李鲁祯刘建青
Owner 江苏艾科维科技股份有限公司
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