Method for increasing dispersity of rubber vulcanization accelerator TMTD (Tetramethyl Thiuram Disulfide)

A technology of rubber vulcanization and accelerator, applied in the field of improving the dispersibility of rubber vulcanization accelerator TMTD, can solve the problems of great influence on the quality of rubber products, non-dispersion of rubber processing enterprises, quality problems of rubber products, etc., and achieve physical and chemical properties and vulcanization reaction. Good, the amount of dust is reduced, and the effect of overcoming the excellent particle strength

Active Publication Date: 2017-06-23
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, TMTD granulation generally adopts the direct granulation method of semi-finished products. Direct granulation is to knead TMTD semi-finished products with water in a certain proportion, extrude them through a granulator, dry them in a fluidized bed, and get finished products after vibrating screen treatment. After the finished product is placed for a period of time, the strength of the particles will harden, and it will be difficult to disperse. In the process of rubber processing, the mixing time will be long, and the scorch time period will cause problems in the quality of rubber products.
[0006] Due to the TMTD granules produced by the original direct granulation method, after a period of time, the granule strength will gradually harden, causing rubber processing enterprises to always appear non-dispersed or unevenly dispersed during use, which has a negative impact on the quality of rubber products. The impact is relatively large, and customers complain constantly, which seriously affects the development of this product in the market

Method used

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  • Method for increasing dispersity of rubber vulcanization accelerator TMTD (Tetramethyl Thiuram Disulfide)
  • Method for increasing dispersity of rubber vulcanization accelerator TMTD (Tetramethyl Thiuram Disulfide)
  • Method for increasing dispersity of rubber vulcanization accelerator TMTD (Tetramethyl Thiuram Disulfide)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select the raw materials according to the following table, and put all the additives into the kneader according to the ratio of 1.5% of the total amount of dry TMTD powder and water. Extrude uniform cylindrical pellets with a diameter of 1.5 ± 0.1 mm. Then dry in the range of 100-130°C by fluidized bed blast, separate the granules and powder with a vibrating screen, and pack the finished granules directly, and return the powder to the kneader for re-kneading with the next batch.

[0023]

[0024] 4 groups of samples were taken out from each batch, and compared by placing them at intervals for a period of time, it can be seen that only the strength of the particles added with MOA-9 hardly changed, and the others all hardened. The experimental results are shown in the table below.

[0025]

Embodiment 2

[0027] Select raw materials according to the following table: TMTD powder, water, MOA-9, MOA-9 is added according to the ratio of 1.0% of the total amount of dry TMTD powder and water, put into the kneader for kneading, after kneading evenly, add The granulator is used to extrude uniform cylindrical granules with a diameter of 1.5±0.1mm from the orifice plate of the machine head through screw conveying. Then dry in the range of 100-130°C by fluidized bed blast, separate the granules and powder with a vibrating screen, and pack the finished granules directly, and return the powder to the kneader for re-kneading with the next batch. Four groups of samples were taken out and placed at intervals for a period of time. It can be seen that the strength of the particles added with MOA-9 is uniform and hardly changes after being placed for a long time.

[0028]

Embodiment 3

[0030] Select raw materials according to the following table: TMTD powder, water, MOA-9, MOA-9 is added according to the ratio of 1.2% of the total amount of dry TMTD powder and water, put into the kneader for kneading, after kneading evenly, add The granulator is used to extrude uniform cylindrical granules with a diameter of 1.5±0.1mm from the orifice plate of the machine head through screw conveying. Then dry in the range of 100-130°C by fluidized bed blast, separate the granules and powder with a vibrating screen, and pack the finished granules directly, and return the powder to the kneader for re-kneading with the next batch. Four groups of samples were taken out and placed at intervals for a period of time. It can be seen that the strength of the particles added with MOA-9 is uniform and hardly changes after being placed for a long time.

[0031]

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Abstract

The invention relates to the technical field of production of rubber vulcanization accelerators, and in particular to a method for increasing the dispersity of a rubber vulcanization accelerator TMTD (Tetramethyl Thiuram Disulfide). The method for increasing the dispersity of the rubber vulcanization accelerator TMTD takes TMTD powder as a treatment object and is characterized by comprising the following steps of adding the TMTD powder into a kneading machine, then adding water and MOA-9 (Fatty Alcohol Polyoxyethylene Ether), adding a mixture into a pelletizer for pelletizing after uniformly kneading, then drying, separating particles and powder by using a vibrating screen, and using the separated particles as finished products. According to the method for increasing the dispersity of the rubber vulcanization accelerator TMTD, disclosed by the invention, the operation is simple, the granulation rate is high, the strength is uniform, the dispersity of TMTD particles in rubber can be effectively improved, and the problems that the particle strength is too hard, dispersion of granular products during a rubber machining process is non-uniform, the dispersion is difficult and the like are solved.

Description

[0001] (1) Technical field [0002] The invention relates to the technical field of rubber vulcanization accelerator production, in particular to a method for improving the dispersibility of the rubber vulcanization accelerator TMTD. [0003] (2) Background technology [0004] Rubber vulcanization accelerator TMTD is an excellent second accelerator for thiazole accelerators. It can also be used in combination with other accelerators, usually in combination with accelerator MBT. The situation is basically similar to the vulcanization of butyl rubber. Mainly used in the manufacture of tires, inner tubes, rubber shoes, medical supplies, cables, industrial rubber products, etc., as a super-accelerator for natural rubber, synthetic rubber and latex, as natural rubber, butadiene rubber, styrene-butadiene rubber, and isoprene rubber aftereffect accelerator. Due to the fact that the finished product after TMTD granulation is placed for a period of time in actual production, the partic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K5/40
CPCC08K5/40C08K9/08
Inventor 徐清华
Owner SHANDONG SUNSINE CHEM
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