A method of coating modified sulfur

A sulfur and modification technology, applied in the field of coating modified sulfur, can solve the problems of low purity of insoluble sulfur products, unstable insoluble sulfur, easy conversion into ordinary sulfur, etc., and achieves low modification cost, improved melting point and thermal stability. The effect of simple and easy-to-obtain raw materials

Active Publication Date: 2019-05-17
安徽固瑞特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to technical reasons, the insoluble sulfur products produced by domestic enterprises have problems such as low purity, high ash content, and poor heat resistance. Compared with products from foreign companies such as Flexsys, there is still a large gap
[0005] Although the performance of insoluble sulfur is outstanding, the technologies for producing insoluble sulfur both at home and abroad still have the disadvantages of high production cost, high energy consumption, serious equipment corrosion, and accidents at high pressure. At the same time, insoluble sulfur is unstable during storage and is easily converted into Ordinary sulfur and other issues
Therefore, while developing the technology of insoluble sulfur in China, in recent years, they are also seeking to develop new processes for the production of environmentally friendly and safe coated sulfur. However, most of these new processes are still in the laboratory stage and have not yet been industrialized.

Method used

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  • A method of coating modified sulfur
  • A method of coating modified sulfur
  • A method of coating modified sulfur

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 20g of silicon dioxide, 20g of talcum powder and mix with 360g of water to prepare a suspension with a concentration of 10% by mass, add 0.04g of silicon-oxygen coupling agent KH550 to treat and grind to a uniformly dispersed suspension with a particle size of 100 μm or less. Add 20g of water-based polyurethane A539 to the treated suspension and stir for 5 minutes, then add 100g of sulfur, stir for 5 minutes to obtain a mixture of coated modified sulfur, dry and dehydrate in an oven at 80°C, crush and sieve to obtain Coated modified sulfur. Take 7.5g of coated sulfur for experiment, 120 ℃ internal mixer mixing, formula 1502 styrene-butadiene rubber 100, zinc oxide 5, accelerator CZ0.6, N234 carbon black 30, the physical properties of rubber were tested according to national standards.

Embodiment 2

[0042] Weigh 10g of alumina, 10g of pottery clay and 20g of water to prepare a suspension with a concentration of 50% by mass, add 0.2g of polyvinyl alcohol to treat and grind to a uniformly dispersed suspension with a particle size below 10μm, and 1g of methyl acrylate Add to the treated suspension and stir for 120min, then add 100g of sulfur, stir for 120min to obtain a mixture of coated modified sulfur, dry and dehydrate in an oven at 88°C, crush and sieve to obtain coated modified sulfur below 200μm . Take 7.5g of coated sulfur for experiment, 120 ℃ internal mixer mixing, formula 1502 styrene-butadiene rubber 100, zinc oxide 5, accelerator CZ0.6, N234 carbon black 30, the physical properties of rubber were tested according to national standards.

Embodiment 3

[0044] Weigh 1g of aluminum silicate and mix with 9g of water to prepare a suspension with a concentration of 10% by mass, add 0.05g of polyethylene glycol to treat and grind to a uniformly dispersed suspension with a particle size below 1 μm, and mix 15g of acrylic resin anionic emulsion Add 3M-68 to the treated suspension and stir for 60 minutes, then add 100g of sulfur, and stir for 30 minutes to obtain a mixture of coated modified sulfur, dry and dehydrate in an oven at 100°C, crush, and sieve to obtain a coating of less than 100 μm Modified sulfur. Take 7.5g of coated sulfur for experiment, 120 ℃ internal mixer mixing, formula 1502 styrene-butadiene rubber 100, zinc oxide 5, accelerator CZ0.6, N234 carbon black 30, the physical properties of rubber were tested according to national standards.

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Abstract

The invention relates to a method for coating and modifying sulfur. The method comprises the following steps: mixing inorganic powder with water to prepare an inorganic powder suspension, adding a modifier, processing the suspension, grinding the obtained processed suspension, adding a coating agent emulsion to the processed inorganic powder suspension, uniformly stirring the emulsion and the suspension, adding sulfur to obtain an inorganic filler / coating agent emulsion / sulfur mixture, drying the mixture, crushing the dried mixture, and sieving the crushed mixture to obtain coated modified sulfur. The method has the advantages of simple device requirements, rapidness and high efficiency in the preparation process, environmental protection and no pollution, and realization of high sulfur release yield and no frosting of the product in the vulcanizing stage, and has good economic benefits as a rubber vulcanizing agent.

Description

technical field [0001] The invention relates to a method for coating modified sulfur, which belongs to the field of chemical products and is mainly used in industries such as rubber products such as tires. Background technique [0002] With the rapid development of my country's automobile industry, the annual output of tires is also increasing year by year. As the main vulcanizing agent of rubber, the demand for sulfur is also increasing year by year. However, the solubility of ordinary sulfur in rubber is limited, and its solubility will increase with the increase of temperature during the rubber mixing process. When the temperature decreases, it will precipitate in the form of crystals on the surface of the rubber compound and migrate to the surface of the rubber compound. That is to form the so-called "blooming" phenomenon in the production of tires and rubber products, which seriously affects the appearance of the product and reduces the adhesion of the product. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K9/04C08K9/06C08K3/06C08K3/36C08K3/34C08K3/22C08K3/30C08K3/26C08L9/06C08K13/06
CPCC08K3/06C08K3/22C08K3/26C08K3/30C08K3/34C08K3/346C08K3/36C08K9/04C08K9/06C08K9/10C08K13/06C08K2003/222C08K2003/2227C08K2003/2296C08K2003/265C08K2003/3045C08L9/06
Inventor 邵进邵彬彬江长军
Owner 安徽固瑞特新材料科技有限公司
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