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Methyl ethyl ketone peroxide curing agent safety tips
Jun 26, 2018

Methyl ethyl ketone peroxide curing agent safety tips

Methyl ethyl ketone peroxide (MEKP) is a highly active, thermally unstable substance. Improper storage, transport, and handling may cause the product to self-accelerate and may also occur:

Explosive decomposition

Decomposing flammables, burning rapidly

The product precipitated from the solvent and exploded in the event of a collision or shock

Reacts violently with pollutants

Corrosion and chemical burns

01-Explosive decomposition

Organic peroxides decompose by heat and give off heat. When the ambient temperature is too high, the heat generated by decomposition does not release to the environment, and heat accumulates, and self-accelerating decomposition occurs.

 

The self-accelerating decomposition temperature (SADT) of qualified MEKP curing agents is greater than 50°C and can be safely stored and transported at room temperature (SADT = Self Accelerating Decomposition Temperature).

 

MEKP undergoes self-accelerating decomposition in a closed container, which can cause thermal explosion with the release of heat and the generation of large amounts of gas. The following figure shows the explosive decomposition of 5 kg MEKP curing agent.

 


02-Decomposing flammables, burning rapidly

 

High-quality methyl ethyl ketone peroxide curing agent has a higher flash point (greater than SADT) and is not flammable. Methyl ethyl ketone peroxide product without distillation dehydration has butanone residues and a relatively low flash point. The flash point of qualified methyl ethyl ketone peroxide curing agents is generally higher than 35 °C.

 

The low-quality product with added methanol has a low flash point (methanol flash point = 12°C), which greatly increases the product's risk and does not meet the safety standards.

 

Once the methyl ethyl ketone peroxide curing agent ignites, the burning rate is extremely fast. The following figure feels the violent burning of 1 gram MEKP sample

 


03-Explosion in case of collision or shock

 

Pure methyl ethyl ketone peroxide is sensitive to mechanical impact or friction and explosive (according to foreign reports, ISIS used pure methyl ethyl ketone peroxide to make explosives for democratic attacks). In order to ensure product safety, it is necessary to add a safe solvent As a desensitizer and to control the total active oxygen content to less than 10%.

 

High-quality methyl ethyl ketone crosslinking curing agents uses high-boiling point solvents such as phthalate esters and fatty esters for desensitization, and is not explosive under normal storage and handling conditions.

 

Methyl ethyl ketone peroxide is insoluble in water. Product delamination occurs due to temperature changes, methanol volatilization, and other Before the shock of impact or impact. The following figure will experience the explosiveness of the next drop of pure MEKP. Is there a sense of sight for explosives!

 


 

 

 


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