Top Rubber Accelerator ZDEC(EZ) Manufacturer(Factory)
Name: Accelerator ZDEC(ZDC, EZ)
Chemical name: Zinc diethyldithiocarbamate
CAS NO:14324-55-1
EINECS:238-270-9
Molecular weight: 361.90
Boiling point 330.6°C
Flash Point 204°(400°F)
MDL NO: MFCD00064798
Appearance: White or off-white powder
Relative density: 1.45~1.51
Melting point: 179~181°C
Insoluble in water. Soluble in benzene carbon disulfide and organic liquids.
Vapour Pressure 0.007Pa at 25°C
Storage conditions under inert gas (nitrogen or Argon) at 2-8°C.
Sensitivity 4: no reaction with water under neutral conditions
Appearance solid
Stability: dust can form an explosive mixture with air
Toxicity: toxic, irritating to skin and eyes.
Used as an accelerator for latex, reference dosage 0.5-1.0 parts. Also used as a modifier for hot melt pressure sensitive adhesive and hot melt adhesive. Due to the production of harmful nitrosamines, it can be replaced by dibenzyl zinc disulfide carbamate (DBZ).
Hazardous material symbols: Xn -Harmful substances 
N – Environmentally hazardous items: 
Hazardous Materials Transportation Number: UN 3077 9/PG 3
HS Code: 38121000
Hazard Class: 6.1
Upstream raw materials: Diethylamine, Zinc Sulfate, Diethyl disulfide.
Production Principle
Sodium diethyldithiocarbamate is produced by condensation of diethylamine and carbon disulfide in an alkaline solution at pH=8 at a temperature lower than 150°C. It is then compounded with zinc sulfate or zinc chloride to obtain the accelerator ZDEC. And then with zinc sulfate or zinc chloride complex decomposition reaction, to get the accelerator ZDEC.
Production Process（Two-Step Process）
In the condensation reaction pot, sodium hydroxide was dissolved in water to form 15% sodium hydroxide solution, and then diethylamine ice and carbon disulfide were added, and the condensation was carried out under stirring, and the temperature of the reaction was controlled below 15℃. The reaction temperature was controlled below 15℃. After 6h, when the pH value was about 8, the condensation reaction was finished, and the sodium diethyldithiocarbamate was obtained by filtration. Add 3-5 times of water to the reaction solution, and add about 10% zinc sulfate solution under stirring to produce zinc diethyldithiocarbamate precipitate. After centrifugal dewatering, washing, drying, crushing and screening, the accelerator ZDEC is obtained. zinc chloride or zinc oxide can also be used in the decomposition reaction.
Quality Stanrand
|
Item |
Powder |
|
Appearance |
White powder |
|
Initial M.P. ℃≥ |
174.0 |
|
Loss on drying % ≤ |
0.50 |
|
Zinc content % |
17.0-19.0 |
|
Residue on 150μm sieve % ≤ |
0.10 |
|
Soluble Zinc Content % ≤ |
0.01 |
Usage
Used as natural rubber and synthetic rubber ultar-fast accelerator, is also a universal latex accelerator, and ammonium dithiocarbamate compared to the activity is poor, but the operation of the safety has been improved. (Add a small amount of fatty acids can improve the mechanical properties of vulcanized rubber, in 10-135 ℃ when the speed of vulcanization is very fast, vulcanization temperature increases, vulcanization flatness is narrow, easy to produce over-sulfur, so the vulcanization temperature should not be more than 125 ℃, containing the product of the rubber with the addition of a small amount of accelerator TMTD, accelerators (MBTS)DM, anti-scorch agent or antioxidant MB, can improve the storage performance of the rubber and delay the vulcanization of the starting point. If it is used with ammonium dithiocarbamate or amine accelerators, the speed of vulcanization can be greatly improved. Also used as a latex non-water-soluble accelerator, the stability of the latex has little effect, generally with water-soluble accelerators (such as ammonium or sodium salt of dithiocarbamic acid) or with other insoluble accelerators (such as zinc salt of other dithiocarbamates) and used to improve the speed of vulcanization is a thiazole and sulfonamide accelerators are good active agents, containing accelerators MBT, TMTD, or MBT(M) and TMTD and used in the Butyl rubber material has a strong activation effect, can greatly shorten its vulcanization time, can also be used for EPDM rubber, but the activation effect is not as strong as for butyl rubber. In the latex for the second thiazole accelerator accelerator, the aging performance of the products obtained is good in the product does not pollute, does not change color, so it is suitable for white or bright-colored products, transparent products. Mainly used in the manufacture of latex products, can also be used in the manufacture of medical products, adhesive tape and self-curing products. The general dosage is 0.1%~1.0% in dry glue material and 0.5%~1.0% in latex material.
Product dosage
When ZDEC is used as the primary accelerator in NR latexes, 1 part ZDEC to 2.5 parts sulfur is a good starting point. 1.5 parts ZDEC to 1 part ZMBT to 2.5 parts sulfur is a good starting point for NR or SBR-based styrofoam applications. In NR and SBR, ZDEC can often be used in conjunction with thiazole and sulfonamide accelerators in an amount of 0.1-0.4 parts. In EPDM rubber applications, ZDEC is often combined with other dithiocarbamate accelerators to minimize frosting, with the dosage depending on the specific application.
Several Reliable Manufacturers for Rubber Accelerator ZDEC in China
Qingdao Rayway Chemical Co.,Ltd.
Qingdao Rayway Chemical Co.,Ltd. is a professional manufacturer of some rubber accelerators including ZDEC, ZMBT, ZDBC, TMTD, and TBzTD Etc. Among them, ZDEC is the most advantageous product, it has the largest production output, high quality, high-cost performance, and fully meets the product quality standards. Many factories use it, including Top Glove, Arpico, Intco Medical, Xingyu Gloves, Midas Safety Etc.
Puyang Willing Chemical Co., Ltd.
Willing New Materials could produce more than 50 kinds of rubber chemicals, using green production technology with 50,000MT/Year capacity, we are one of the biggest rubber chemicals manufacturers with the richest products chosen in China. ZDEC is also an advantageous product. And their production process is a two-step production process.
Anyang LIYUAN New Material Technology Co., Ltd.
Henan Liyuan Group is located in Tongye Town, Yindu District, Henan Province, and is one of the top 100 industrial enterprises in Henan Province. Anyang Liyuan New Material Technology Co., Ltd. was established in 2017 and is a wholly-owned subsidiary of Liyuan Group with a registered capital of 45 million yuan. The annual output is 1,500 tons of monobenzylamine, 3,000 tons of dibenzylamine, 3,000 tons of rubber accelerator TBZTD, 500 tons of rubber accelerator ZBEC, and 1,500 tons of rubber accelerator ZDEC. It has first-class production equipment and testing equipment, advanced technology, and high quality The staff team and perfect quality control system guarantee high quality.