Preparation of single-shell sulfur microcapsule

A technology of microcapsules and sulfur, which is applied in the field of preparation of single-shell sulfur microcapsules, can solve the problems of high toxicity, explosion, and dangerous production operations, and achieve good compatibility, prevent frosting, and simple and feasible processes

Inactive Publication Date: 2012-08-15
CHINA UNIV OF PETROLEUM (BEIJING) +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the cost of IS is 5 to 10 times that of ordinary sulfur, it cannot completely replace ordinary sulfur
In addition, the traditional production method of IS is to use carbon disulfide leaching to increase the content of IS. This method has the disadvantages of high energy consumption and serious equipment corrosion. At the same time, carbon disulfide is flammable, explosive, and highly toxic, making the production operation very dangerous.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Prepare the quality of each component of single-shell sulfur microcapsules as follows:

[0016] Sublimed sulfur 3.1g

[0017] Toluene diisocyanate 4g

[0018] Tween 21 emulsifier 0.5g

[0019] Polyvinyl alcohol 1.5g

[0020] water 64g

[0021] Diethylenetriamine 1.5g

[0022] Ethylenediamine 1g

[0023] Formic acid 0.8g

[0024] The preparation method of single-shell sulfur microcapsules is as follows:

[0025] (1) Prepare 15g of 10% polyvinyl alcohol aqueous solution, then add 0.5g of Tween 21 emulsifier, heat and stir to prepare the water phase;

[0026] (2) Pour 3.1 g of sublimed sulfur and 4 g of toluene diisocyanate into a beaker, stir for 2 min, and prepare an oil phase;

[0027] (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;

[0028] (4) Connect the condensing reflux water device, add ...

Embodiment 2

[0032] Prepare the quality of each component of single-shell sulfur microcapsules as follows:

[0033] Sublimed sulfur 4.2g

[0034] Toluene diisocyanate 4g

[0035] Tween 21 emulsifier 0.5g

[0036] Gelatin 1.5g

[0037] water 64g

[0038] Diethylenetriamine 1.5g

[0039] Ethylenediamine 1g

[0040] Formic acid 0.8g

[0041] The preparation method of single-shell sulfur microcapsules is as follows:

[0042] (1) Prepare 15g of 10% gelatin aqueous solution, then add 0.5g of Tween 21 emulsifier, heat and stir to prepare the water phase;

[0043] (2) Pour 4.2g of sublimed sulfur and 4g of toluene diisocyanate into a beaker, stir for 2min, and prepare an oil phase;

[0044] (3) Slowly add the oil phase to the water phase, stir and emulsify with FM200 laboratory high-speed shear emulsifier at 12000 rpm for 10 minutes to obtain an emulsion, and transfer the emulsion to a four-necked flask;

[0045] (4) Connect the condensing reflux water device, add dropwise 53g of an aqueo...

Embodiment 3

[0049] Prepare the quality of each component of single-shell sulfur microcapsules as follows:

[0050] Sublimed sulfur 5.3g

[0051] Toluene diisocyanate 5g

[0052] Tween 20 Emulsifier 0.4g

[0053] Polyvinyl alcohol 1.5g

[0054] Water 64.5g

[0055] Diethylenetriamine 3g

[0056] Ethylenediamine 1g

[0057] Formic acid 0.8g

[0058] The preparation method of single-shell sulfur microcapsules is as follows:

[0059] (1) Prepare 15g of 10% polyvinyl alcohol aqueous solution, then add 0.4g Tween 20 emulsifier, heat and stir to prepare the water phase;

[0060] (2) Pour 5.3 g of sublimed sulfur and 5 g of toluene diisocyanate into a beaker, stir for 2 min, and prepare an oil phase;

[0061] (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;

[0062](4) Connect the condensing reflux water device, add drop...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for single lamella sulfur microcapsules. The single lamella sulfur microcapsule is prepared by an interface polymerization method; the process thereof is simple and efficient with low cost. The single lamella sulfur microcapsule prepared by the method is melted under a certain temperature, gives off sulfur and serves as the vulcanization of rubber agent. The coating rate of the sulfur in the microcapsules can be changed by changing the mixture ratio of the raw materials. In addition, as the shell wall of the sulfur microcapsules is polymer materials, therefore, the shell wall has good compatibility with the rubber and gives attention to the thermal stability and chemical durability of the sulfur and can increase the performances of ageing-resistant, scorching and the like of rubber products.

Description

technical field [0001] The invention belongs to a preparation method of sulfur microcapsules which can be used as a rubber vulcanizing agent, in particular to a preparation method of single-shell sulfur microcapsules. Background technique [0002] The interface polymerization method is a new type of microcapsule coating technology. Its principle is that two immiscible liquid phases polymerize at the interface to form a capsule wall material, and finally the capsule wall material is coated around the capsule core material. , to prepare approximately spherical microcapsule products. [0003] At present, sulfur is still a main vulcanizing agent, but because its solubility in rubber increases with the increase of temperature, when the amount of sulfur added is large, part of the sulfur will be crystallized on the surface of the rubber after the rubber is cooled. Precipitation, resulting in "blooming". "Blooming" not only affects the appearance of rubber products, but also redu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08L21/00
Inventor 汪树军魏斌刘红研李杰何文婷李继开顾万东陈小乔
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap