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Composite material of ultra-branched organic montmorillonite / heat vulcanization type silicon rubber, and preparation method

A technology of organic montmorillonite and synthetic reaction, which is applied in the treatment of dyed low-molecular organic compounds, etc., can solve the problems that limit the wide application of montmorillonite, and achieve far-reaching social impact and good economic benefits.

Inactive Publication Date: 2007-10-10
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: montmorillonite must be stirred at a high speed in a liquid polymer (rubber), and must be melted at a high temperature in a solid polymer (rubber) in order to show its unique reinforcing properties. Special requirements are put forward, which greatly limits the wide application of montmorillonite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.10mol methyl acrylate, 0.10mol diethanolamine and 10mL methanol to a 250mL four-neck flask reaction kettle, and the mixture is heated at 15°C under nitrogen 2 Under normal circumstances, after stirring for 30 minutes, the temperature was raised to 40°C and maintained for 3 hours, and then vacuumed to remove methanol to obtain a colorless and transparent oil, ie, methyl N,N-dihydroxy-3-aminopropionate. Weigh 5 g of organic montmorillonite, 30 g of N, N-dihydroxy-3-aminopropionic acid methyl ester monomer and 0.2 g of p-toluenesulfonic acid in a four-necked flask, and stir at 100 °C under nitrogen protection for 8 hours, followed by vacuum to remove unreacted monomers, resulting in a dope containing grafted organomontmorillonite and ungrafted polymer. The product was washed with methanol, centrifuged and precipitated, and the precipitate was washed with a solvent and then centrifuged again. The above steps were repeated until no unreacted substances and polymers wer...

Embodiment 2

[0035] Add 0.20mol methyl acrylate, 0.20mol diethanolamine and 15mL methanol in a 250mL four-necked flask reactor, and the mixture is 2 After stirring for 40 minutes under normal conditions, the temperature was raised to 30°C and maintained for 4 hours, and then vacuumed to remove methanol to obtain a colorless transparent oil, ie, methyl N,N-dihydroxy-3-aminopropionate. Weigh 10g of organic montmorillonite, 40g of N,N-dihydroxy-3-aminopropionic acid methyl ester monomer and 0.4g of p-toluenesulfonic acid in a four-necked flask, and stir vigorously at 110°C under nitrogen protection After 9 hours, vacuum was applied to remove unreacted monomer, resulting in a dope containing grafted organomontmorillonite and ungrafted polymer. The product was washed with methanol, centrifuged and precipitated, and the precipitate was washed with a solvent and then centrifuged again. The above steps were repeated until no unreacted substances and polymers were detected in the washing liquid. T...

Embodiment 3

[0039] Add 0.30mol methyl acrylate, 0.30mol diethanolamine and 20mL methanol in a 250mL four-necked flask reactor, and the mixture is 2 Under normal circumstances, after stirring for 50 minutes, the temperature was raised to 20°C and maintained for 5 hours, and then vacuumed to remove methanol to obtain a colorless transparent oil, ie, methyl N,N-dihydroxy-3-aminopropionate. Weigh 15g of organic montmorillonite, 50g of N,N-dihydroxy-3-aminopropionic acid methyl ester monomer and 0.5g of p-toluenesulfonic acid in a four-necked flask, and stir vigorously at 120°C under nitrogen protection After 10 hours, vacuum was applied to remove unreacted monomer, resulting in a dope containing grafted organomontmorillonite and ungrafted polymer. The product was washed with methanol, centrifuged and precipitated, and the precipitate was washed with a solvent and then centrifuged again. The above steps were repeated until no unreacted substances and polymers were detected in the washing liqui...

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Abstract

This invention discloses a method for preparing hyperbranched organic montmorillonite / heat-curing silicone rubber composite. The composite is composed of: methylvinylsilicone raw rubber 80-90 parts, 2, 4-di-tert-butyl peroxy hexane 0.5-0.8 part, and hyperbranched organic montmorillonite 10-20 parts. The hyperbranched organic montmorillonite is dispersed in the polymer matrix in nanoscale lamellar state, which can exhibit good small size effect, interfacial effect and quantum tunneling effect, thus the chemical reaction contact surface area and activity of the hyperbranched organic montmorillonite are significantly increased. The composite has obviously improved tensile strength and elongation at break than silicone rubber added with organic montmorillonite. The tensile strength is near that of silicone rubber added with gaseous white carbon black.

Description

technical field [0001] The invention relates to a thermally vulcanized silicone rubber composite material containing hyperbranched organic montmorillonite and a preparation method thereof. Background technique [0002] Montmorillonite, also known as microcrystalline kaolin, is the main component of bentonite. Observed under an electron microscope, the crystals are monoclinic and generally in the form of irregular flakes. The color is white with light gray, sometimes with light blue or light red, and the luster is dull; it has strong adsorption capacity and ion exchange capacity, and also has high colloid, plasticity and cohesive force. Mohs hardness 2~2.5, specific gravity 2~2.7g / cm 3 , bulk density is 1~1.1g / mL. Chemical composition is Na 0.7 (Al 3.3 Mg 0.7 ) Si 8 o 20 (OH) 4 ·nH 2 O is a 2:1 type layered silicate, that is, each unit cell is composed of two silicon-oxygen tetrahedral wafers with an aluminum-oxygen octahedral wafer in the middle to form a sandwich ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/08C08L83/14C08K9/04C08J3/24
Inventor 王锦成赵维达肖俊
Owner SHANGHAI UNIV OF ENG SCI
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