What is Rubber Accelerator ZDEC?

Rubber accelerator ZDEC, full name Zinc Diethyl Dithiocarbamate, is a widely used chemical additive in the rubber industry. ZDEC is a white powdery substance soluble in organic solvents such as benzene, chloroform, and carbon disulfide. It has a melting point of approximately 174°C and a density of 1.41 g/cm³. While it exhibits good stability, storing it in a cool, dry place away from direct sunlight and ignition sources is recommended.

Rubber accelerator ZDEC plays an indispensable role in the rubber industry as a crucial component in the rubber vulcanisation process. Its primary function is to accelerate the vulcanization process of rubber by catalyzing the reaction between sulfur and rubber molecules, forming cross-linked structures that enhance the mechanical properties, elasticity, and resistance to heat, aging, and chemical corrosion of rubber. Rubber accelerator ZDEC, with its fast curing speed, water solubility, broad compatibility with various rubber polymers, and low toxicity, has found widespread application in the field of latex products.

Reasons for its application in latex systems:

Adaptation to aqueous environments: ZDEC’s water solubility facilitates easy dispersion and promotion in latex products.
Dispersion and hydrophilicity: As a water-based accelerator, ZDEC exhibits good dispersion and hydrophilic properties, aiding in uniform distribution within latex.
Fast curing speed: The rapid curing speed of ZDEC suits the production requirements of latex products that need quick vulcanization.
Enhancement of rubber performance: ZDEC contributes to improving the mechanical properties, elasticity, and heat resistance of latex products.
Wide rubber compatibility: ZDEC is compatible with various rubber polymers, including natural rubber, styrene-butadiene rubber (SBR), butyl rubber, and nitrile rubber.

Product data:

Chemical name: Zinc Diethyl Dithiocarbamate (Zinc diethyl dithiocarbamate)
CAS NO.: 14324-55-1
Appearance: White powder
Solubility: Soluble in organic solvents such as benzene, chloroform, and carbon disulfide
Melting point: Approximately 174°C
Density: 1.41 g/cm³
Storage conditions: Cool, dry place, away from direct sunlight and ignition sources

Inspection standards and methods:

Chemical composition and purity inspection:
Standard: GB/T 24213-2009 “Rubber additives Zinc diethyl dithiocarbamate Analysis method”
Method: Using acid, titration, and spectrophotometry to determine the content of zinc diethyl dithiocarbamate in ZDEC.
Appearance and particle characteristic inspection:
Standard: GB/T 6667-2008 “Inspection method for appearance and particle characteristics of rubber additives”
Method: Visual inspection of appearance, microscopic examination of particle uniformity, size, and shape.
Solubility and solvent residue inspection:
Standard: GB/T 6666-2008 “Inspection method for solvent residue of rubber additives”
Method: Dissolving ZDEC samples, evaporating solvents, and using gas chromatography to detect the residual amount of organic solvents.
Melting point determination:
Standard: GB/T 33591-2017 “Determination method for the melting point of rubber additives”
Method: Using a melting point tester, recording temperature changes to determine the melting point of ZDEC.
Density determination:
Standard: GB/T 4472-2011 “Plastics, rubber, and their additives Density determination method”
Method: Using density determination equipment such as a specific gravity bottle to measure the density of ZDEC samples.
Toxicity and safety assessment:
Standard: GB/T 31270-2014 “Method for toxicity and safety evaluation of rubber additives”
Method: Conducting animal experiments, cell culture experiments, and evaluating the acute toxicity, subacute toxicity, and toxicity to human cells of ZDEC.