Oligo cation for co-coagulation of rubber latex and montmorillonite suspension liquid

A polycation and rubber latex technology, applied in the field of flocculants, can solve the problems of low apparent density, flying, and high energy consumption in mixing

Inactive Publication Date: 2007-05-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the apparent density of carbon black and white carbon black is very small, it is easy to generate flying during production and mixing with rubber, causing ...

Method used

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  • Oligo cation for co-coagulation of rubber latex and montmorillonite suspension liquid
  • Oligo cation for co-coagulation of rubber latex and montmorillonite suspension liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a 250ml three-necked flask, 5.8g of N,N'-tetramethylethylenediamine was added, and 100ml of absolute ethanol solution was added to dissolve it. Then add 33.5 g of excess 10% hexadecane bromide and raise the temperature to 70-80° C. for reflux reaction for 48 hours, then cool and crystallize at 0° C., and obtain white crystals by suction filtration. Prepare the oligomeric cationic surfactant DDA we need. Finally, the prepared surfactant is configured into a 5% aqueous solution.

[0021] Get 10g of montmorillonite and put it into a 500ml flask, then add 300ml of deionized water and stir. Then with 10% Na 2 CO 3 The pH value of the solution was adjusted to about 10, stirred for 24 hours, and left to stand for later use.

[0022] The rubber latex of 300g is mixed with 5% montmorillonite suspension, then its mixed solution is added to 5% DDA solution for flocculation (2% H can be added 2 SO 4 solution assisted flocculation). Then add zinc oxide 5.0, stearic acid 2....

Embodiment 2

[0024] At a low temperature of 25°C, slowly add epichlorohydrin dropwise to the ethanol solution of ethylenediamine, and ensure that the molar ratio of diamine to epichlorohydrin is 1:4, and the dropping time is about 8 hours. Continue to stir for 24h, then increase the temperature to 40°C, and stir for 5h. Then add a tertiary amine with a saturated alkyl chain therein, and reflux in the ethanol solution for 48 hours. The obtained sample is recrystallized three times with a solvent of m(ethanol):m(acetone)=1. An oligomeric cationic surfactant with four long alkyl chains is obtained.

[0025] Get 10g of montmorillonite and put it into a 500ml flask, then add 300ml of deionized water and stir. Then with 10% Na 2 CO 3 The pH value of the solution was adjusted to about 10, stirred for 24 hours, and left to stand for later use.

[0026] The rubber latex of 300g is mixed with 5% montmorillonite suspension, then its mixed solution is added to 5% solution for flocculation (2% H ca...

Embodiment 3

[0028] At a low temperature of 25°C, slowly add epichlorohydrin dropwise to the ethanol solution of hexamethylenediamine, and ensure that the molar ratio of diamine to epichlorohydrin is 1:4, and the dropping time is about 8 hours. Continue to stir for 24h, then increase the temperature to 40°C, and stir for 5h. Then add a tertiary amine with a saturated alkyl chain therein, and reflux in the ethanol solution for 48 hours. The obtained sample is recrystallized three times with a solvent of m(ethanol):m(acetone)=1. An oligomeric cationic surfactant with four long alkyl chains is obtained.

[0029] Get 10g of montmorillonite and put it into a 500ml flask, then add 300ml of deionized water and stir. Then with 10% Na 2 CO 3 The pH value of the solution was adjusted to about 10, stirred for 24 hours, and left to stand for later use.

[0030] The rubber latex of 300g is mixed with 5% montmorillonite suspension, then its mixed solution is added to 5% solution for flocculation (2%...

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Abstract

This invention relates to an oligomerization cationic surfactant used in co-flocculation of rubber latex and montmorillonite suspensions, which is characterized by: (1) the surfactant can be used as a flocculant to flocculate rubber latex and avoid adverse effects to performance after rubber vulcanization compared with flocculation with the direct use of acid, (2) since the oligomeric cation molecule has positive charge and can be used as anti-ion adsorption layer of montmorillonite, its long alkyl chain can be montmorillonite interlayer, which is in favor of the compatibility between montmorillonite and rubber macromolecules, and (3) the process can complete the organification of montmorillonite and flocculation of rubber in one step, which avoids pollution, reduces energy consumption, and simplifies operation.

Description

Technical field [0001] The present invention relates to a flocculant that can be used in the field of inorganic filler montmorillonite to enhance the mechanical properties of rubber technical background [0002] The rubber industry plays a pivotal role in the national economy and people's lives, and the world consumes millions of tons of rubber every year. However, the strength of pure rubber is very low, far from meeting practical requirements, and most rubber products must be reinforced with reinforcing agents. For a long time, carbon black and white carbon black have occupied an absolute dominant position as reinforcing agents for the existence and development of the rubber industry, and their consumption accounts for about 30% of the raw rubber consumption, and the annual consumption in my country alone reaches hundreds of thousands of tons . However, because the apparent density of carbon black and white carbon black is very small, it is easy to generate flying during ...

Claims

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Application Information

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IPC IPC(8): C08K5/16C08C1/16C08K3/34
Inventor 徐燕莉鲁先振
Owner BEIJING UNIV OF CHEM TECH
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