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Formula of raw materials for producing sulfur microcapsule capable of being used as rubber vulcanizing agent

A microcapsule and sulfur technology, applied in the field of raw material formulation of sulfur microcapsules, can solve the problems of inflammability and explosion, inability to produce rubber products, expensive insoluble sulfur, etc., achieving simple and feasible process, preventing "blooming, and avoiding early vulcanization". effect of the problem

Inactive Publication Date: 2012-08-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, insoluble sulfur is leached by carbon disulfide in production, which makes the operation very dangerous, flammable and explosive. In addition, insoluble sulfur is very expensive, so it cannot be widely used in the production of various rubber products.

Method used

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  • Formula of raw materials for producing sulfur microcapsule capable of being used as rubber vulcanizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The quality of each component of the prepared single-shelled sulfur microcapsules is as follows:

[0018] Sublimed Sulfur 14.9g

[0019] Urea 15.1g

[0020] 37% formaldehyde solution 30.1g

[0021] Sodium dodecyl sulfonate 0.15g

[0022] Gelatin 1.5g

[0023] Water 43.6g

[0024] Triethanolamine 0.5g

[0025] Formic acid 0.71g

[0026] The preparation method of single-shell layer sulfur microcapsules is as follows:

[0027] (1) 15.1g of urea and 30.1g of 37% formaldehyde solution were added to the four-necked flask, triethanolamine was added dropwise, the pH value was adjusted to 8-9, and the reaction was stirred at 70° C. for 1h to prepare a urea-formaldehyde resin prepolymer;

[0028] (2) prepare an aqueous solution containing 1.5g of gelatin, add 0.15g of sodium dodecyl sulfonate surfactant, and heat and stir to prepare an aqueous solution;

[0029] (3) sublimation sulfur is added in the aqueous phase solution, with shearing emulsifying machine with 10000rpm ...

Embodiment 2

[0034] The quality of each component of the prepared single-shelled sulfur microcapsules is as follows:

[0035] Sublimed Sulfur 14.9g

[0036] Urea 10.1g

[0037] 37% formaldehyde solution 20.2g

[0038] Sodium dodecyl sulfonate 0.1g

[0039] Gelatin 1.5g

[0040] Water 43.6g

[0041] Triethanolamine 0.5g

[0042] Formic acid 0.71g

[0043] The preparation method of single-shell layer sulfur microcapsules is as follows:

[0044] (1) 10.1g of urea and 20.2g of 37% formaldehyde solution were added to the four-necked flask, 0.5g of triethanolamine was added dropwise, the pH value was adjusted to 8-9, and the reaction was stirred at 70° C. for 1h to prepare a urea-formaldehyde resin prepolymer;

[0045] (2) prepare an aqueous solution containing 1.5g of gelatin, add 0.1g of sodium dodecyl sulfobenzene surfactant, and heat and stir to prepare an aqueous solution;

[0046] (3) sublimation sulphur is added in the aqueous phase solution, with shear emulsifying machine with 10...

Embodiment 3

[0051] The quality of each component of the prepared single-shelled sulfur microcapsules is as follows:

[0052] Sublimed Sulfur 15g

[0053] Urea 5.0g

[0054] 37% formaldehyde solution 9.9g

[0055] Sodium dodecyl sulfonate 0.15g

[0056] Gelatin 1.5g

[0057] water 45g

[0058] Triethanolamine 0.5g

[0059] Formic acid 0.71g

[0060] The preparation method of single-shell layer sulfur microcapsules is as follows:

[0061] (1) 5g of urea and 9.9g of 37% formaldehyde solution were added to the four-necked flask, 0.5g of triethanolamine was added dropwise, the pH value was adjusted to 8-9, and the reaction was stirred at 70° C. for 1h to prepare a urea-formaldehyde resin prepolymer;

[0062] (2) prepare an aqueous solution containing 1.5g of gelatin, add 0.15g of sodium dodecyl sulfobenzene surfactant, and heat and stir to prepare an aqueous solution;

[0063](3) sublimation sulphur is added in the aqueous phase solution, with shear emulsifying machine with 10000rpm ro...

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Abstract

The invention discloses a formula of raw materials for producing a sulfur microcapsule capable of being used as a rubber vulcanizing agent, which consists of sublimed sulfur, urea, 37% of formaldehyde solution, gelatin or polyvinyl alcohol, formic acid, triethanolamine and water. The formula can be used for preparing a sulfur microcapsule product by the in-situ polymerization method, and sulfur can be released by melting a coating layer at certain temperature, thereby playing the role of vulcanizing rubber.

Description

technical field [0001] The invention belongs to a raw material formula for producing sulfur microcapsules which can be used as a rubber vulcanizing agent. Background technique [0002] Sulfur is the most commonly used vulcanizing agent for rubber. The solubility of sulfur in different rubbers is different. At the same time, temperature has a great influence on the solubility of sulfur, which leads to the easy ejection of sulfur during the rubber mixing process, which affects the quality of rubber products. [0003] Insoluble sulfur is an important rubber vulcanizing agent to solve the "spray box" phenomenon on the surface of the rubber compound. It has chemical inertness and physical inertness, and has good distribution stability in the compound. The phenomenon of early scorch occurs, and it can be widely used in the adhesive compound of tire carcass compound and skeleton material without polluting the mold, improving the appearance quality of light-colored products and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08G12/12C08K3/06C08L21/00
Inventor 汪树军李杰刘红研熊文峰张莉莉徐艳武
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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