What are Inhibitors?

Inhibitors are substances that slow or stop the rate of a chemical reaction or a biological process. There are different types of inhibitors and each works in a different way.

Some common types of inhibitors are

Enzyme inhibitors: Inhibit the function of enzymes. Many medicines are enzyme inhibitors. For example, aspirin reduces pain and inflammation by inhibiting an enzyme responsible for prostaglandin synthesis.

Reaction inhibitors: Slow the rate of chemical reactions. For example, antioxidants inhibit reactions to prevent cellular damage caused by free radicals.

Cellular inhibitors: Prevent cells from growing or multiplying. Many drugs used in cancer treatment are cellular inhibitors.

What is a Pre-Vulcanisation Inhibitor?

Apre-vulcanisation inhibitor is an additive that delays the start of the vulcanisation process in rubber compound. Vulcanisation is a chemical reaction in which rubber chains bind together, hardening and strengthening the rubber. Pre-vulcanisation inhibitors are used to facilitate the processing and shaping of rubber compound.

Some common types of pre-vulcanisation inhibitors are

• Dithiocarbamates: The most common type of pre-vulcanisation inhibitors. It is used to facilitate the processing of rubber paste and to control the vulcanisation time.
• Guanidine derivatives: Less toxic than dithiocarbamates and provide rubber compounds with better processing properties.
• Aromatic amines: A special type of pre-vulcanisation inhibitors that protect against vulcanisation at higher temperatures.

Inhibitors (Pre Vulcanisation)

Inhibitors: Substances used to slow down or stop chemical reactions. In rubber production, inhibitors are used to prevent pre-vulcanisation (hardening).

Pre-Vulcanisation Preventer (PVP)

Chemical additives that prevent undesirable hardening of the rubber compound. PVPs are an important part of rubber production and directly affect the quality and performance of rubber products.

Working Principle of OVPs

SCPs work by forming a barrier that prevents rubber molecules from reacting with each other. This barrier protects the processability and formability of the rubber compound.

Usage Areas of ÖVPs

• Natural rubber and synthetic rubber production
• Tyre and plastic production
• Rubber based adhesives and sealants

Benefits of ÖVPs

• Prevents pre-vulcanisation
• Maintains the processability and mouldability of the rubber compound
• Improves the quality and performance of rubber products

Classification of OVPs

• Reactive OVPs: React with rubber molecules to form a barrier.
• Non-Reactive OVPs: Forms barrier without reacting with rubber molecules.

SCP Selection

The correct choice of SCP depends on the type of rubber compound, the desired properties and the production process.