Pre-dispersion masterbatch used as rubber ultra-fast accelerator ZDMC and preparation method of pre-dispersion masterbatch

A technology of pre-dispersed masterbatches and accelerators, which is applied in the field of rubber ultra-speed accelerator ZDMC pre-dispersed masterbatches and its preparation, which can solve the problems affecting the quality of rubber products and the health of operators, dust pollution, uneven dispersion, etc. , to achieve the effect of avoiding dust flying, improving quality and convenient ingredients

Inactive Publication Date: 2016-10-12
NINGBO ACTMIX POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since zinc dimethyl dithiocarbamate is in powder form, it will stick together at room temperature. When it is used as an accelerator, there will be problems of uneven dispersion and dust pollution in the rubber mixing process, which will affect the quality and operation of rubber products. worker's health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The rubber overspeed accelerator ZDMC pre-dispersed masterbatch of embodiment one, by weight, the composition of the masterbatch is: 80 parts of zinc dimethyl dithiocarbamate, 7.5 parts of EPDM rubber, two 3 parts of ethylene propylene rubber, 0.5 parts of ethylene-vinyl acetate copolymer, 4 parts of naphthenic oil, 1 part of stearic acid, 1 part of triethanolamine, 3 parts of a mixture of saturated and unsaturated fatty acid zinc soap. The preparation method of this master batch, comprises the following steps:

[0017] (1) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0018] (2) Put each raw material into an internal mixer or an open mixer, knead at a temperature of 80-90 °C for 10-15 minutes, and discharge at a temperature of 85-90 °C to obtain a rubber compound;

[0019] (3) Feed the rubber compound obtained after mixing to the extruder. The temperature control area of ​​the extruder is divided into sev...

Embodiment 2

[0020] The rubber overspeed accelerator ZDMC pre-dispersed masterbatch of embodiment two, by weight, the composition of the masterbatch is: 80 parts of zinc dimethyl dithiocarbamate, 12 parts of nitrile rubber, naphthenic oil 3 parts, 1 part of stearic acid, 1 part of triethanolamine, 3 parts of a mixture of saturated and unsaturated fatty acid zinc soap. The preparation method of this master batch, comprises the following steps:

[0021] (1) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0022] (2) Put each raw material into an internal mixer or an open mixer, knead at a temperature of 80-90 °C for 10-15 minutes, and discharge at a temperature of 85-90 °C to obtain a rubber compound;

[0023] (3) Feed the compound obtained after mixing to the extruder. The temperature control area of ​​the extruder is divided into seven sections from the feed inlet to the discharge outlet. The temperature of the first section is ...

Embodiment 3

[0024] The rubber overspeed accelerator ZDMC pre-dispersed masterbatch of embodiment three, by weight, the composition of the masterbatch is: 75 parts of zinc dimethyl dithiocarbamate, 13 parts of EPDM rubber, two 4 parts of ethylene propylene rubber, 1 part of ethylene-vinyl acetate copolymer, 3 parts of naphthenic oil, 1 part of stearic acid, 1 part of triethanolamine, 2 parts of a mixture of saturated and unsaturated fatty acid zinc soap. The preparation method of this master batch, comprises the following steps:

[0025] (1) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0026] (2) Put each raw material into an internal mixer or an open mixer, knead at a temperature of 80-90 °C for 10-15 minutes, and discharge at a temperature of 85-90 °C to obtain a rubber compound;

[0027] (3) Feed the compound obtained after mixing to the extruder. The temperature control area of ​​the extruder is divided into seven sectio...

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Abstract

The invention discloses a pre-dispersion masterbatch used as a rubber ultra-fast accelerator ZDMC. The pre-dispersion masterbatch used as the rubber ultra-fast accelerator ZDMC consists of the following components in parts by weight: 75-82 parts of zinc dimethyldithiocarbamate, 10-14 parts of a rubber carrier, 2-6 parts of naphthenic oil, 1 part of stearic acid, 1 part of triethanolamine, and 2-5 parts of a mixture of saturated and unsaturated fatty acid zinc soap. The zinc dimethyldithiocarbamate is prepared into the pre-dispersion masterbatch, so that the original activity of the zinc dimethyldithiocarbamate can be guaranteed effectively. The pre-dispersion masterbatch cannot be caked at room temperature, and batching is convenient and accurate, when the pre-dispersion masterbatch is used as an ultra-fast accelerator in the follow-up process, dust flying is avoided in a rubber melting process, a working environment of an operator can be improved, the use level of the accelerator is reduced, and the utilization rate of the zinc dimethyldithiocarbamate is increased; the pre-dispersion masterbatch has relatively low Mooney viscosity at the relatively low temperature of 50 DEG C, and has good dispersibility in rubber, and the quality of a rubber product can be improved.

Description

technical field [0001] The invention relates to the technical field of rubber additives and its preparation, in particular to ZDMC pre-dispersed masterbatch particles of a rubber overspeed accelerator and a preparation method thereof. Background technique [0002] Zinc dimethyldithiocarbamate (ZDMC for short) is white powder, soluble in dilute lye, carbon disulfide, benzene, acetone and methylene chloride, slightly soluble in chloroform, insoluble in ethanol, carbon tetrachloride, acetic acid Ethyl ester, almost insoluble in water, but has good wettability in water. ZDMC is often used as a rubber accelerator. The vulcanization speed of ZDMC in rubber is very fast and the vulcanization time is short. It is an ultra-fast accelerator. The addition of thiuram and thiazole accelerators can delay the initial vulcanization and improve processing safety. Alkaline accelerators can activate it, and a small amount of ZDMC can be used as a secondary accelerator of thiol or thiuram acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/08C08L91/00C08K5/39C08K5/09C08K5/17C08K5/098
CPCC08L23/16C08L2205/02C08L2205/025C08L2205/035C08L23/0853C08L91/00C08K5/39C08K5/09C08K5/17C08K5/098
Inventor 连千荣
Owner NINGBO ACTMIX POLYMER
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