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Raw materials formula for producing single-shell sulfur microcapsule

A technology of microcapsules and sulfur, which is applied in the field of raw material formulations for the preparation of single-shell sulfur microcapsules, which can solve problems such as severe equipment corrosion, poor product stability, and high energy consumption

Inactive Publication Date: 2012-11-14
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the cost of insoluble sulfur is very high, about 5 to 10 times that of ordinary sulfur, so it cannot completely replace ordinary sulfur, and the traditional production method of insoluble sulfur is to use carbon disulfide leaching to increase the content of insoluble sulfur
This method has the disadvantages of high energy consumption, serious equipment corrosion, inflammability and explosion; and the produced product has poor stability and is easy to depolymerize and reduce to ordinary soluble sulfur

Method used

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  • Raw materials formula for producing single-shell sulfur microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare the quality of each component of single-shell sulfur microcapsules as follows:

[0020] Sublimed sulfur 0.55g

[0021] Toluene diisocyanate 6.5g

[0022] OP emulsifier 0.4g

[0023] Polyvinyl alcohol 1.5g

[0024] Water 63.5g

[0025] Diethylenetriamine 3g

[0026] Ethylenediamine 1.5g

[0027] Formic acid 0.8g

[0028] The preparation method of single-shell sulfur microcapsules is as follows:

[0029] (1) Prepare 15g of 10% polyvinyl alcohol aqueous solution, then add 0.4g OP emulsifier, heat and stir to prepare the water phase;

[0030] (2) Pour 0.55 g of sublimed sulfur and 6.5 g of toluene diisocyanate into a beaker, stir for 2 min, and prepare an oil phase;

[0031] (3) Slowly add the oil phase to the water phase, stir and emulsify with FM200 laboratory high-speed shear emulsifier at 15,000 rpm for 10 minutes to obtain an emulsion, and transfer the emulsion to a four-necked flask;

[0032] (4) Connect the condensing and reflux water device, add 54....

Embodiment 2

[0036] Prepare the quality of each component of single-shell sulfur microcapsules as follows:

[0037] Sublimed Sulfur 1.5g

[0038] Toluene diisocyanate 5.5g

[0039] OP emulsifier 0.3g

[0040] Gelatin 1.5g

[0041] Water 63.5g

[0042] Diethylenetriamine 3g

[0043] Ethylenediamine 0.5g

[0044] Formic acid 0.6g

[0045] The preparation method of single-shell sulfur microcapsules is as follows:

[0046] (1) Prepare 15g of 10% gelatin aqueous solution, then add 0.3g of OP emulsifier, heat and stir to prepare the water phase;

[0047] (2) Pour 1.5g of sublimed sulfur and 5.5g of toluene diisocyanate into a beaker, stir for 2min, and prepare an oil phase;

[0048] (3) Slowly add the oil phase to the water phase, stir and emulsify with FM200 laboratory high-speed shear emulsifier at 15,000 rpm for 10 minutes to obtain an emulsion, and transfer the emulsion to a four-necked flask;

[0049] (4) Connect the condensing reflux water device, add dropwise 53.5g of an aqueous ...

Embodiment 3

[0053] Prepare the quality of each component of single-shell sulfur microcapsules as follows:

[0054] Sublimed sulfur 3.3g

[0055] Toluene diisocyanate 4.5g

[0056] OP emulsifier 0.2g

[0057] Gelatin 1.5g

[0058] Water 63.5g

[0059] Diethylenetriamine 1.5g

[0060] Ethylenediamine 1.5g

[0061] Formic acid 0.5g

[0062] The preparation method of single-shell sulfur microcapsules is as follows:

[0063] (1) Prepare 15g of 10% gelatin aqueous solution, then add 0.2g OP emulsifier, heat and stir to prepare the water phase;

[0064](2) Pour 3.3g of sublimed sulfur and 4.5g of toluene diisocyanate into a beaker, stir for 2min, and prepare an oil phase;

[0065] (3) Slowly add the oil phase to the water phase, stir and emulsify with FM200 laboratory high-speed shear emulsifier at 11,000 rpm for 10 minutes to obtain an emulsion, and transfer the emulsion to a four-necked flask;

[0066] (4) Connect the condensing reflux water device, add 53 g of an aqueous solution con...

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Abstract

The invention discloses a raw material formulation for manufacturing single lamella sulfur microcapsules, which comprises sublimed sulfur, toluene di-isocyanate, water, quadrol and diethylenetriamine. The single lamella sulfur microcapsule is prepared with the formulation by an interface polymerization method, gives off sulfur under a certain temperature and plays a role in sulfuration. The single lamella sulfur microcapsule, the mass fraction of the sulfur of which ranges from 5-53%, can be prepared by changing the matching of the raw materials.

Description

technical field [0001] The invention belongs to a raw material formula for preparing single-shell sulfur microcapsules. Background technique [0002] Vulcanizing agent, also known as crosslinking agent, can chemically interact with raw rubber during vulcanization. Through the connection of one or more sulfur atoms, a cross-linked network structure is formed between rubber molecules, so that its elasticity, hardness, stretching and other properties are greatly improved. [0003] Sulfur is the earliest vulcanizing agent used in rubber. It is not only cheap, but also has good elasticity and fatigue resistance. However, the solubility of sulfur in rubber increases with the increase of temperature, so when it is added in a large amount, part of the sulfur will precipitate on the surface of the rubber in the form of crystals after the rubber mixture is cooled, resulting in "blooming". "Blooming" not only affects the appearance of rubber products, but also reduces its surface adh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08G18/76C08G18/32
Inventor 汪树军魏斌刘红研李继开顾万东陈小乔
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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