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 design criteria.
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
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 up curing.
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
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.