Various types of rubber additives function summary

Vulcanizing agent
Vulcanizing agent is a substance that can cross-link with rubber, so it is also called cross-linking agent. Vulcanizing agent is the most important type of rubber compounding agent.

Accelerator
It refers to the substance that can shorten the vulcanization time and lower the vulcanization temperature after being added to the rubber.  

Activator
It is the substance which can increase the activity of accelerator, reduce the amount of accelerator and shorten the vulcanization time after adding into the rubber material, and it is also called accelerator auxiliary.

Antioxidant
Raw rubber or rubber products in the process, storage or use, will be affected by heat, oxygen, light and other environmental factors and gradually undergo physical and chemical changes, so that its performance deterioration and loss of value, this phenomenon has become the "aging" of rubber.

Plasticizer
Rubber molecules can be separated, thereby reducing its glass transition temperature and the unvulcanized rubber melt viscosity and vulcanized rubber hardness of the substance known as plasticizers. In the past they were also called "softeners".

Adhesives
Synthetic rubber adhesives, usually including butylbenzene, nitrile, chlorobutyl, butyl, butyl pyrene, polyisobutylene, polysulfide and silicone and other eight categories of synthetic rubber.

Rubber and Metal Adhesives
It is a kind of stuff used for rubber and metal bonding. It can be used for rubber and metal bonding, also can be used for rubber and plastic, fiber fabric bonding.

Plasticizer
It is a substance that enhances the plasticizing effect of raw rubber and shortens the plasticizing time by chemical action.

Foaming agent
Chemicals used in polymer materials such as rubber and plastic to make sponge-like products.

Binding agent
A chemical substance that is added directly to the rubber material along with other additives when mixing the rubber material, and is used to combine the two materials at the vulcanization temperature, and does not directly produce physical adsorption or chemical bonding between the materials, but promotes the adhesive action. Therefore, they are also called additive direct bonding agents.

Tackifier
Adhesion promoter just in the multi-layer rubber products processing process to increase the surface viscosity of the rubber material, so as to facilitate the adhesive processing between the rubber layer, the interface to produce physical adsorption, belongs to the processing aids.

Coupling agent
Is a class of substances with amphoteric structure, part of their molecules can be reacted with inorganic surface chemical groups, the formation of chemical bonding; the other part of the group is pro-organic nature, and organic molecules can be a chemical reaction or produce a strong intermolecular role, so that the two properties of the materials are very different from the solid combination, improve the dispersion of inorganic fillers in the polymer matrix, improve the filler It can improve the dispersion state of inorganic filler in the polymer matrix and improve the mechanical properties and usability of the filled polymer materials.

Homogenizer
The main function of the homogenizer is to solve the problem of different solubility parameters, different viscosity and different polarity polymer blending, and make it mixing uniformly.

Dispersant
Adsorbed at the liquid-solid interface, thus significantly reducing the interfacial free energy of the liquid-solid interface, so that the dispersed solid powder can be uniformly dispersed in the liquid, and no longer reaggregate the substance.

Isolating agent
A substance that reduces the adhesion between two interfaces that are in contact with each other.

Colorant
Substances added to plastic, rubber, and fiber products to give them color, collectively called colorants.

Desiccant
Rubber products (e.g., sealing strips, hoses, etc.) are vulcanized continuously at high temperature and normal pressure, and air bubbles are often generated in the finished product due to the presence of moisture in the compound.

Lubricant
A substance that effectively improves the fluidity of a rubber compound. It is divided into two types: internal lubrication and external lubrication.

Initiator
Substances that can be decomposed to produce free radicals under certain conditions. Generally, compounds containing unsaturated bonds are added to certain initiators.

Emulsifier
It is a substance that can make two or more immiscible (or partially immiscible) liquids form a stable dispersion system - emulsion.

Defoamer
The main ingredient is calcium oxide with fine particle size (above 320 mesh). The mechanism is that calcium oxide combines with trace water in the compound during mixing and vulcanization to produce calcium hydroxide, which prevents rubber products from foaming when vulcanized at high temperature, so it is called antifoaming agent.

Deodorizer
Rubber deodorizer is also known as rubber odor masking agent, rubber deodorizer, rubber deodorizer, etc.

Mold release agent
The function of release agent is to separate the cured products from the mold smoothly, so as to get the smooth and flat products, and to ensure that the mold can be used for many times.

Rubber external mold release agent
A substance used to prevent rubber products from sticking to the surface of the mold and to make them come out of the mold smoothly without tearing.

Rubber internal release agent
The internal release agent is added to the production according to the percentage of the raw material, while the external release agent is sprayed into the mold cavity after the original liquid is diluted according to a certain ratio.