Rubber Polymers – There are numerous grades of base polymers that vary in properties and cost.
Select the right polymer for your application because rubber does not have a universal, one-sizefits-all
Fillers – Are available in two types: reinforcing, such as carbon black, and non-reinforcing, such
as calcium carbonate. They help provide durability and performance in rubber compounds, as
well as reduce the cost of raw materials.
Plasticizers – They improve the rubber’s flow during processing and enhance filler dispersion.
Tackifiers – Provide short- and long-term tack in the compound that causes two layers to stick
together with mild pressure.
Process Aids – As the name implies, these chemicals improve the compound’s processability.
Internal Lubricants – Are mixed into the compound to keep the compound from sticking to
process equipment and to lower heat build up.
Protectants – Include antioxidants that slow deterioration caused by contact with oxygen,
antiozonants that slow deterioration caused by contact with ozone, and waxes, as well as metal deactivators and flame-retardants.
Accelerators – Hasten the chemical reaction and optimize the cross-linking reaction to speed
Activators – Strengthen accelerator performance and activate the vulcanization process.
Curatives – Sulfur, sulfur donors and other chemicals that cause cross-linking to occur.
Colorants – Are dispersions that eliminate cross-contamination of dry pigments, enhance color
consistency across batch lots, reduce costs and increase product quality.
Blowing Agents – Produce gas by chemical or thermal action when added to a rubber compound
in the manufacture of foamed or sponge products.
Bonding Agents – Adheres rubber to metal or other surfaces.
Vulcanizing Agents – These agents provide the chemical necessary for converting rubber or
related polymers into a more durable rubber-elastic material end product.