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Production process for rubber applying high-quality insoluble sulfur

A production process and high-quality technology, applied in the preparation/purification of sulfur, etc., can solve the problems of unstable linear macromolecules of insoluble sulfur, poor high temperature stability, poor dispersibility, etc., and achieve good bonding effect, high stability and dispersion. high sex effect

Active Publication Date: 2017-11-24
SHANGHAI JINGHAI ANHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, insoluble sulfur linear macromolecules are unstable, and are easily depolymerized into ordinary ring-shaped macromolecules at high temperatures.
Compared with foreign countries, the insoluble sulfur produced in China now has low content, poor dispersion and poor high temperature stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A production process of high-quality insoluble sulfur for rubber, comprising the following steps:

[0025] (1) pre-grinding: after mixing turpentine and phosphorus pentachloride, send it into a high-speed mixer and mix with ordinary sulfur to obtain mixed fine powder; the mass ratio of described turpentine, phosphorus pentachloride, and ordinary sulfur is 1.2 :0.5:100.

[0026] (2) Polymerization: Pour the mixed fine powder into the reactor, then evacuate the reactor, and flush nitrogen into it, and repeat this 5 times until the air in the reactor is completely removed, then flush into nitrogen again, and make The internal pressure of the reactor is 0.16Mpa; preheat the mixed fine powder to 130°C, then raise the temperature to 180°C while stirring at a speed of 3°C / min, keep warm for 25min, and then heat up to 180°C while stirring at a speed of 3°C / min 265°C, keep warm for 80min;

[0027] (3) Quenching: Spray the above-mentioned liquid sulfur in 0.2% pentaerythyl alco...

Embodiment 2

[0032] A production process of high-quality insoluble sulfur for rubber, comprising the following steps:

[0033] (1) pre-grinding: after mixing turpentine and phosphorus pentachloride, send it into a high-speed mixer and mix evenly with common sulfur to obtain mixed fine powder; the mass ratio of said turpentine, phosphorus pentachloride and common sulfur is 1 :0.6:100.

[0034] (2) Polymerization: Pour the mixed fine powder into the reactor, then evacuate the reactor, and flush it with argon, repeat this 4 times until the air in the reactor is completely removed, and finally flush it with argon, And make the internal pressure of the reactor 0.14Mpa; preheat the mixed fine powder to 125°C, then raise the temperature to 165°C while stirring at a speed of 4°C / min, keep warm for 30min, and then stir at a speed of 2°C / min Raise the temperature to 260°C and keep it warm for 70 minutes;

[0035] (3) Quenching: Spray the above-mentioned liquid sulfur in 0.2% pentaerythyl alcohol a...

Embodiment 3

[0040] A production process of high-quality insoluble sulfur for rubber, comprising the following steps:

[0041] (1) pre-grinding: after mixing turpentine and phosphorus pentachloride, send it into a high-speed mixer and mix with common sulfur to obtain a mixed fine powder; the mass ratio of said turpentine, phosphorus pentachloride and common sulfur is 1.5 :0.3:100.

[0042](2) Polymerization: Pour the mixed fine powder into the reactor, then evacuate the reactor, and flush nitrogen into it, and repeat this 3 times until the air in the reactor is completely removed, and then flush into nitrogen again, and make The internal pressure of the reactor is 0.16Mpa; preheat the mixed fine powder to 120°C, then raise the temperature to 170°C while stirring at a speed of 3°C / min, keep it warm for 20min, and then raise the temperature to 270℃, keep warm for 60min;

[0043] (3) Quenching: Spray the above-mentioned liquid sulfur in 0.2% pentaerythyl alcohol aqueous solution after press...

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Abstract

The invention provides a production process for rubber applying high-quality insoluble sulfur. The production process includes the steps of 1), pre-grinding namely evenly mixing turpentine with phosphorus pentachloride before sending to a high-speed mixer with general sulfur for even mixing to obtain mixed powder; 2), polymerization and preheating, namely pouring the mixed powder into a reactor which is 0.14-0.16Mpa in internal pressure under an inert environment; raising the temperature to 165-180DEG C, keeping the temperature for 20-30 minutes, raising the temperature to 260-270DEG C, and keeping the temperature for 60-80 minutes; 2), shock cooling; 4), solidification, namely performing vacuum drying and crushing and sieving; 6), oil charging, namely performing crushing and sieving, and adding a compound stabilizer on 4-aminopyridine dihydrochloride and triphenyl phosphate before oil charging. The production process is easy in raw material obtaining, simple in generation process, less in danger and low in energy consumption, the insoluble sulfur obtained in final production is high in content, high in dispersibility, high in stability and good in comprehensive performance.

Description

technical field [0001] The invention relates to the production field of insoluble sulfur, in particular to a production process of high-quality insoluble sulfur for rubber. Background technique [0002] Insoluble sulfur is a non-toxic, flammable yellow powder, named for its insolubility in carbon disulfide. It is obtained by thermal polymerization of ordinary sulfur. The number of sulfur atoms in the molecular chain is as high as 108 or more. It has the viscoelasticity and molecular weight distribution of high polymers. Therefore, it is also called elastic sulfur or polymeric sulfur. It belongs to inorganic polymer chemical raw materials. [0003] Insoluble sulfur is a linear macromolecule, insoluble in rubber and difficult to migrate, so it can effectively reduce the occurrence of blooming phenomenon; insoluble sulfur can be evenly dispersed in rubber without agglomeration, which reduces the scorch tendency of rubber semi-finished products; large insoluble sulfur The molec...

Claims

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Application Information

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IPC IPC(8): C01B17/12C08K3/06C08L21/00
CPCC01B17/12C08K3/06C08L21/00
Inventor 陈杰胡建敏
Owner SHANGHAI JINGHAI ANHUI CHEM
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