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Raw material formula for producing sulfur microcapsules using melamine resins

A technology of melamine resin and microcapsules is applied in the field of raw material formulation of sulfur microcapsules, which can solve the problems of dangerous operation, equipment corrosion, high price, etc.

Inactive Publication Date: 2012-05-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production method of insoluble sulfur (IS) has disadvantages such as dangerous operation, high energy consumption, and serious corrosion of equipment.
In addition, the price of IS is very expensive. First, it is several to ten times that of ordinary sulfur, which is not conducive to the wide application of IS. Currently, IS is only used in the production of radial tires.

Method used

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  • Raw material formula for producing sulfur microcapsules using melamine resins
  • Raw material formula for producing sulfur microcapsules using melamine resins
  • Raw material formula for producing sulfur microcapsules using melamine resins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The quality of each component of the prepared single-shell sulfur microcapsules is as follows:

[0012]

[0013] The preparation method of single-shell sulfur microcapsules is as follows:

[0014] (1) Add 5.0g of melamine and 9.6g of 37% formaldehyde solution to a four-necked flask, add dropwise 10% sodium carbonate solution, adjust the pH to 8.5-9, keep at 60℃ and stir for 30min to prepare the melamine resin prepolymer body;

[0015] (2) Prepare 40.1g aqueous solution containing 0.5g polyvinyl alcohol, add 0.5g OP-10 surfactant, heat and stir to prepare an aqueous solution;

[0016] (3) Add 5.1 g of sublimed sulfur to the aqueous solution, shear and disperse it for 5 minutes with a shear emulsifier at 10000 rpm to obtain a sulfur dispersion suspension, and transfer the suspension and the melamine resin prepolymer to a four-necked flask in;

[0017] (4) Turn on the condensing reflux water device, add formic acid to adjust the pH to 5-6, stir at 350rpm, heat up to 60°C, and cure...

Embodiment 2

[0021] The quality of each component of the prepared single-shell sulfur microcapsules is as follows:

[0022]

[0023] The preparation method of single-shell sulfur microcapsules is as follows:

[0024] (1) Add 6.8g of melamine and 13.2g of 37% formaldehyde solution to a four-necked flask, add 10% sodium carbonate solution dropwise, adjust the pH to 8.5-9, stir and react at 60°C for 30min to prepare melamine resin prepolymer;

[0025] (2) Prepare 50.1g aqueous solution containing 0.5g gelatin, add 0.1g sodium dodecyl sulfonate surfactant, heat and stir to prepare an aqueous solution;

[0026] (3) Add 5.2 g of sublimed sulfur to the aqueous solution, shear and disperse it for 3 minutes with a shear emulsifier at 7500 rpm to obtain a sulfur dispersion suspension, and transfer the suspension and the melamine resin prepolymer to a four-necked flask in;

[0027] (4) Put on a condensing reflux water device, add formic acid to adjust the pH to 5-6, stir at 350rpm, heat up to 60°C, and cure t...

Embodiment 3

[0031] The quality of each component of the prepared single-shell sulfur microcapsules is as follows:

[0032]

[0033] The preparation method of single-shell sulfur microcapsules is as follows:

[0034] (1) Add 3.2g of melamine and 6.8g of 37% formaldehyde solution to a four-necked flask, add 10% sodium carbonate solution dropwise, adjust the pH to 8.5-9, stir and react at 60°C for 30min to prepare melamine resin prepolymer;

[0035] (2) Prepare an aqueous solution containing 0.5 g of gelatin, add 0.075 g of sodium dodecyl sulfonate surfactant, heat and stir to prepare an aqueous solution;

[0036] (3) Add 5.1 g of sublimed sulfur to the aqueous solution, shear and disperse it for 5 minutes with a shear emulsifier at 10000 rpm to obtain a sulfur dispersion suspension, and transfer the suspension and the melamine resin prepolymer to a four-necked flask in;

[0037] (4) Turn on the condensing reflux water device, add formic acid to adjust the pH value to 5-6, stir at 450rpm, heat up to ...

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Abstract

The invention discloses a prepration method and a raw material formula for producing sulfur microcapsules using melamine resins, comprising sublimed sulfur, melamine, 37% formaldehyde solution, formic acid, gelatin or polyvinyl alcohol, sodium dodecyl sulfate or OP-10 surfactant and 10% sodium carbonate solution. The formula is used for preparing the sulfur microcapsules with single shells by in-situ polymerization. The coating shells are smelted to release sulfur at certain temperature; therefore, the sulfur microcapsules can vulcanize rubbers.

Description

Technical field [0001] The invention belongs to a raw material formula of sulfur microcapsules that can be used as a rubber vulcanizing agent, and particularly relates to a raw material formula of sulfur microcapsules with a melamine resin as a shell material. Background technique [0002] As an important chemical raw material, sulfur is widely used in many fields such as agriculture, medicine, catalysts, rubber, gunpowder, building materials, matches, wine making and sugar making. The biggest use of sulfur is to make sulfuric acid. It is also used more in the sugar industry and chemical fiber industry. In addition, it is also widely used in fine chemicals such as insoluble sulfur, vulcanized oil, sulfur-coated urea, and sulfur for sterilization. In addition, sulfur is still a major rubber vulcanizing agent, but because its solubility in rubber increases with temperature, when the addition amount is large, part of the sulfur will be in the form of crystals in the rubber after the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/32C08K9/10C08K3/06C08L21/00
Inventor 汪树军李杰刘红研魏斌杨桃刘洁
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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