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Application of double-bond functionalized alpha-amino triethoxy silane in crosslinking or modification

A technology of functionalization of aminotriethoxysilane, which is applied in organic chemistry, chemical instruments and methods, dyeing organosilicon compound treatment, etc., and can solve the problems of high modifier cost, long modification time, and low efficiency , to achieve the effect of increasing hydrophobicity, improving compatibility, and changing hydrophilicity and hydrophobicity

Inactive Publication Date: 2021-09-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current commonly used method for substrate modification is the soaking method, but the modifier used in the soaking method is high in cost, long in modification time, low in efficiency, and serious in waste

Method used

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  • Application of double-bond functionalized alpha-amino triethoxy silane in crosslinking or modification
  • Application of double-bond functionalized alpha-amino triethoxy silane in crosslinking or modification
  • Application of double-bond functionalized alpha-amino triethoxy silane in crosslinking or modification

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Experimental program
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Effect test

preparation example Construction

[0065] Preparation of chloromethyltriethoxysilane:

[0066] Add 36.036g of urea and 150ml of petroleum ether into a 250ml three-necked round-bottomed bottle, and the bottle mouth is connected with a spherical condenser and two constant-pressure dropping funnels. Under nitrogen protection, 27.642g of ethanol (with anhydrous treatment) and 30.000g of chloromethyltrichlorosilane were respectively added to two constant pressure dropping funnels. Under the protection of nitrogen, heat and stir the mixture of urea and petroleum ether to 65°C, then add ethanol and chloromethyltrichlorosilane synchronously at a rate of 1 drop / second; The reaction was stirred at ℃ for 5h. After the reaction, filter the reaction solution to remove insoluble viscous matter; heat the obtained filtrate to 90°C to remove petroleum ether and ethanol, and recover the obtained petroleum ether and ethanol; heat the remaining liquid to 70°C under a vacuum of 10mmHg , and distill off the transparent liquid to o...

Embodiment 1

[0074] Application of α-(N-methyl-N-allyl)aminomethyltriethoxysilane as crosslinking agent for RTV silicone rubber

[0075] Take 3g of hydroxy silicone oil with a molecular weight of 3000, add 3ml of toluene to it, mix evenly, place it in a mold, and then use the hydroxyl and double bonds in the hydroxy silicone oil to functionalize the mole of ethoxy in α-aminotriethoxysilane The ratio is 1:1 Weigh 0.165g double-bond functionalized α-aminotriethoxysilane, dissolve it in toluene solvent, add it dropwise into hydroxyl silicone oil and stir quickly to mix evenly, at 15-16.5°C, 40-46% humidity Under the cross-linking curing.

[0076] The surface-drying time of the cross-linked mixed system after mixing hydroxy silicone oil-alkoxy silane was measured by finger touch method. The crosslinking curing time of α-(N-methyl-N-allyl) aminomethyltriethoxysilane p-hydroxyl silicone oil is

Embodiment 2

[0078] α-(N-methyl-N-allyl)aminomethyltriethoxysilane on SiO 2 surface modification

[0079] will settle SiO 2 Hydroxyl activation treatment was carried out by Piranha solution, and the hydroxyl content of silica after hydroxyl activation treatment was estimated by thermogravimetric method. According to characterization estimation, the hydroxyl content of silica after hydroxyl activation treatment was about 0.0032866mol / g.

[0080] Get six parts of 0.2g of silica after hydroxyl activation treatment, respectively add 5ml of anhydrous toluene as solvent, then add 0.65732mmol (0.162g) double bond functionalized α-aminotriethoxysilane respectively, 6 parts of mixture, According to the time of 5min, 10min, 30min, 1h, 1.5h, 2h, stop stirring and quickly remove the toluene solution by suction filtration, and then repeatedly wash the filtered SiO with a large amount of anhydrous toluene 2 . Then SiO2 is collected, and after drying, elemental analysis is carried out to detect its N ...

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Abstract

The invention relates to an application of double-bond functionalized alpha-amino triethoxy silane in crosslinking or modification. The application of the double-bond functionalized alpha-amino triethoxy silane in crosslinking or modification is as follows: a, the double-bond functionalized alpha-amino triethoxy silane is used as a crosslinking agent of room temperature vulcanized silicone rubber to accelerate the crosslinking and curing time; b, the double-bond functionalized alpha-amino triethoxy silane is used as a coupling agent to modify an inorganic material so as to improve the compatibility of the material and organic substances; c, the surface of SiO2 is modified, and the reaction rate of SiO2 hydroxyl is increased; and d, the surface of the inorganic substrate material is modified to change the hydrophilicity and hydrophobicity of the surface of the inorganic substrate material. According to the application, the functionalized alpha-amino triethoxy silane can be quickly crosslinked with hydroxyl silicone oil, and meanwhile, the functionalized alpha-amino triethoxy silane can also be used as the coupling agent to be applied to the field of modification of glass, metal, inorganic filler and the like so as to improve the compatibility of the materials and organic substances. The biggest advantage of the functionalized alpha-amino triethoxy silane is that the the functionalized alpha-amino triethoxy silane can be quickly hydrolyzed and crosslinked withhydroxyl group under the conditions of no catalyst and room temperature, and a functionalized group structure is introduced.

Description

technical field [0001] The invention relates to the application of double-bond functionalized α-aminotriethoxysilane in crosslinking or modification, and belongs to the field of organosilicon applications. Background technique [0002] Room temperature vulcanized silicone rubber is divided into one-component and two-component according to the packaging and storage form, and can be divided into two types: addition type and condensation type according to the curing reaction mechanism; the crosslinking agent of one-component room temperature vulcanization silicone rubber is Group of polyfunctional silane compounds, the general formula is R 4-n Si Y n , wherein n=3 or n=4, R is a carbon functional group, Y is a hydrolyzable group; it plays a role in curing and crosslinking in one-component room temperature vulcanizing silicone rubber. However, most of these crosslinking agents are small molecules containing only one silicon atom, with a single variety, and some mechanical prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/544C08L83/04C08J3/24C09C3/12C07F7/18C03C17/30C23C22/02
CPCC08K5/544C08J3/24C07F7/1876C09C1/3081C03C17/002C03C17/30C23C22/02C01P2006/90C08J2383/04C03C2218/111C03C2217/70C08L83/04
Inventor 贝逸翎宋慈刘雷朱庆增
Owner SHANDONG UNIV
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