Production process of dithiocarbamate zinc salt rubber accelerator

A technology of zinc dibutyl dithiocarbamate and zinc amylidene dithiocarbamate, which is applied in the field of new green, environmentally friendly and harmless production processes, can solve chloride pollution, and cannot realize the reuse and treatment of final water. Difficulty and other problems, to achieve the effect of improving efficiency, optimizing production process, and simplifying production process

Inactive Publication Date: 2018-09-21
宜兴市鸿远精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this production process are: the by-product sodium chloride salty wastewater will be produced during the production process, which is difficult to treat and cannot realize the reuse of final water, and the product contains NaCl, which needs to be washed with a large amount of water. prone to chlorine pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of production technology that is zinc dimethyl dithiocarbamate (PZ) rubber accelerator, it comprises the following steps:

[0026] S1. Put a certain amount of water in a clean reactor, turn on the stirring cooling water, put a certain amount of zinc oxide into the reactor and stir for a period of time;

[0027] S2. Put dimethylamine in the reactor, continue to stir for half an hour after adding, add CS2 dropwise in the reactor, and control the reaction temperature below 40°C;

[0028] S3, after the reaction finishes, continue stirring for a period of time, and detect that the pH value is neutral and stop stirring;

[0029] S4. Put the slurry into a centrifuge for dehydration, drying, and crushing to obtain a finished product.

[0030] In this embodiment, the mass ratio of the required raw materials is water: zinc oxide: dimethylamine: CS 2 It is 5:1:0.55:1.87.

[0031] In this embodiment, the stirring time after adding zinc oxide is 15 minutes. The resulting ...

Embodiment 2

[0033] A kind of production technology of dithiocarbamate zinc salt type rubber accelerator, it comprises the following steps:

[0034] S1. Put a certain amount of water in a clean reactor, turn on the stirring cooling water, put a certain amount of zinc hydroxide into the reactor and stir for a period of time;

[0035] S2. Put diethylamine into the reactor, continue to stir for half an hour after adding, add CS dropwise into the reactor 2 , control the reaction temperature below 40°C;

[0036] S3, after the reaction finishes, continue stirring for a period of time, and detect that the pH value is neutral and stop stirring;

[0037] S4. Put the slurry into a centrifuge for dehydration, drying, and crushing to obtain a finished product.

[0038] In this embodiment, the mass ratio of the required raw materials is water: zinc oxide: diethylamine: CS2 is 5:1:1.8:1.87.

[0039] In this example, the stirring time after adding zinc hydroxide is 20 minutes, and the obtained rubber ...

Embodiment 3

[0041] A kind of production technology of dithiocarbamate zinc salt type rubber accelerator, it comprises the following steps:

[0042] S1. Put a certain amount of water in a clean reactor, turn on the stirring cooling water, put a certain amount of zinc hydroxide into the reactor and stir for a period of time;

[0043] S2. Put di-n-butylamine into the reactor, continue stirring for half an hour after adding, add CS dropwise into the reactor 2 , control the reaction temperature below 40°C;

[0044] S3, after the reaction finishes, continue stirring for a period of time, and detect that the pH value is neutral and stop stirring;

[0045] S4. Put the slurry into a centrifuge for dehydration, drying, and crushing to obtain a finished product.

[0046] In this example, the mass ratio of the required raw materials is water: zinc oxide: di-n-butylamine: CS2 is 5:1:1.59:1.87, and the stirring time after adding zinc hydroxide is 20 minutes. The agent is zinc dibutyldithiocarbamate....

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PUM

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Abstract

The invention provides an environment-friendly harmless new production process of a dithiocarbamate zinc salt rubber accelerator. The process comprises the following steps of S1. putting water and zinc oxide in a clean reactor and stirring; S2. putting organic amine, stirring for half hour and then adding CS2 dropwise, and controlling reaction temperature at 40DEG C or below; S3. stopping stirringwhen PH value is detected neutral; and S4. treating the paste to obtain znic dimethyldithiocarbamate (PZ), zinc diethyl dithiocarbamaate (ZDC), zinc dibutyl dithiocarbamate (BZ), 1,5-zinc sulfinyl dithiocarbamate (ZPD) and / or zinc dibenzyl dithiocarbamate (DBZ). The process optimizes the steps, and changes an original two-step method into a one-step method, thereby improving the efficiency and simplifying the production process. The processing process does not generate sodium chloride wastewater, thereby being environmentally friendly; and the product has higher performance, and zinc oxide does not contain chloride.

Description

technical field [0001] The invention relates to a new environmentally friendly and harmless production process of a zinc dithiocarbamate rubber accelerator. Background technique [0002] Rubber accelerator refers to rubber vulcanization accelerator. Rubber vulcanization is mainly carried out with sulfur, but the reaction between sulfur and rubber is very slow, so vulcanization accelerators came into being. Adding the accelerator to the rubber compound can promote the activation of the vulcanizing agent, thereby accelerating the cross-linking reaction between the vulcanizing agent and rubber molecules, and achieving the effect of shortening the vulcanization time and lowering the vulcanization temperature. According to the chemical structure, the vulcanization accelerators mainly used include sulfenamides, thiazoles, thiurams, and some guanidines, thioureas and dithiocarbamates. [0003] The existing rubber accelerator ZDC production process is mainly organic amine+NaOH+dro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C333/16C08K5/39C08L21/00
CPCC07C333/16C08K5/39C08L21/00
Inventor 吕鹏明
Owner 宜兴市鸿远精细化工有限公司
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