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Method for producing bilayer film sulfur microcapsule

A technology of microcapsules and double-layer membranes, which is applied in the field of raw material formulation of sulfur microcapsules, and can solve the problems of flammability, high energy consumption, and explosiveness of carbon disulfide

Inactive Publication Date: 2012-05-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of high energy consumption and serious corrosion of equipment. At the same time, carbon disulfide is flammable, explosive and highly toxic, making the production operation very dangerous.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare the quality of each component of bilayer membrane sulfur microcapsule as follows:

[0026] Sublimed sulfur 0.4g

[0027] Urea 2g

[0028] 37% formaldehyde solution 4g

[0029] Triethanolamine 0.3g

[0030] Tween 85 0.5g

[0031] Gelatin 2g

[0032] Toluene diisocyanate 5g

[0033] water 70g

[0034] Formic acid 0.4g

[0035] Diethylenetriamine 1.5g

[0036] Ethylenediamine 1g

[0037] The preparation method of bilayer membrane sulfur microcapsule is as follows:

[0038] (1) Mix 2g of urea and 4g of 37% formaldehyde solution evenly, pour it into a four-necked flask equipped with a condenser, add 0.3g of triethanolamine to adjust the pH value of the solution to 9, and then at a temperature of 50°C, stir Under the condition of speed of 1500rpm, react for 2 hours to prepare urea-formaldehyde prepolymer;

[0039] (2) Pour 0.4g of sublimated sulfur and 5g of toluene diisocyanate into a beaker and stir for 5min to prepare an oil phase; add 0.5g of Tween85 to...

Embodiment 2

[0045] Prepare the quality of each component of bilayer membrane sulfur microcapsule as follows:

[0046] Sublimed Sulfur 2g

[0047] Urea 3g

[0048] 37% formaldehyde solution 6g

[0049] Triethanolamine 0.3g

[0050] Tween 85 0.6g

[0051] Gelatin 2g

[0052] Toluene diisocyanate 5g

[0053] water 70g

[0054] Formic acid 0.4g

[0055] Diethylenetriamine 1.5g

[0056]Ethylenediamine 1.5g

[0057] The preparation method of bilayer membrane sulfur microcapsule is as follows:

[0058] (1) Mix 3g of urea and 6g of 37% formaldehyde solution evenly, pour into a four-necked flask equipped with a condenser, add 0.3g of triethanolamine to adjust the pH value of the solution to 9, then at a temperature of 50°C, stir Under the condition of speed of 1500rpm, react for 2 hours to prepare urea-formaldehyde prepolymer;

[0059] (2) Pour 2g of sublimed sulfur and 5g of toluene diisocyanate into a beaker and stir for 5 minutes to prepare an oil phase; add 0.6g of Tween85 to 20g of...

Embodiment 3

[0065] Prepare the quality of each component of bilayer membrane sulfur microcapsule as follows:

[0066] Sublimated Sulfur 4g

[0067] Urea 2.5g

[0068] 37% formaldehyde solution 5g

[0069] Triethanolamine 0.3g

[0070] Tween 61 0.5g

[0071] Gelatin 2g

[0072] Toluene diisocyanate 5g

[0073] water 70g

[0074] Formic acid 0.5g

[0075] Diethylenetriamine 2g

[0076] Ethylenediamine 1g

[0077] The preparation method of bilayer membrane sulfur microcapsule is as follows:

[0078] (1) 2.5g urea and 5g 37% formaldehyde aqueous solution are mixed uniformly, pour in the four-neck flask that condenser is housed, add 0.3g triethanolamine to adjust the pH value of solution to 9, then at a temperature of 50°C, Under the condition of stirring speed of 1300rpm, react for 2 hours to prepare urea-formaldehyde prepolymer;

[0079] (2) Pour 4g of sublimed sulfur and 5g of toluene diisocyanate into a beaker and stir for 5 minutes to prepare an oil phase; add 0.5g of Tween61 t...

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Abstract

The invention discloses a raw material formulation for manufacturing double layer film sulfur microcapsule. The formulation consists of sublimed sulfur, toluene diisocyanate, water, ethylenediamine, diethylene triamine, urea and formaldehyde. The formulation prepares the double layer film sulfur microcapsule through an interfacial polymerization method, wherein the core material of the microcapsule is sublimed sulfur, while the first layer of sheathing material is the interfacial polymerization product polyurea of ethylenediamine, diethylene triamine and toluene diisocyanate and the second layer of sheathing material is urea resin. The double sheathing layers have the advantages of improving compactness during wrapping the core material. Moreover, the sulfur microcapsule prepared by the formulation causes relatively less environmental pollution and has simple process, safe operation and low cost; therefore, the microcapsule can be used as a rubber vulcanizing agent.

Description

technical field [0001] The invention belongs to a raw material formula of sulfur microcapsules which can be used as a rubber vulcanizing agent, in particular to a raw material formula of double-layer membrane sulfur microcapsules. Background technique [0002] The preparation method of microcapsules is: first disperse the wrapped material into fine particles, and then use the fine particles as the core to deposit film-forming materials on the surface. The microcapsules formed in this process are called microcapsules. The substance wrapped inside the microcapsule is called the capsule core, which can be solid, liquid or gas; the coating film outside the microcapsule formed by the film-forming material is called the wall material, usually natural and modified polysaccharides, gums, proteins , various liposomes and synthetic high polymers, etc. The choice of wall material depends on the nature and use of the capsule core. The particle size of the microcapsules is generally 1-1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08L61/24C08L75/02C08L21/00C08G18/32C08G18/76C08G12/12
Inventor 汪树军魏斌刘红研李杰何文婷
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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