Rubber Compounding Ingredients

Activators accelerators ingredients and fillers inorganic compounds mainly metal oxides zinc oxide hydrated lime organic acids normally in combination with metal oxides stearic oleic stearic oleic alkaline substances will increase ph of rubber usually increases cure.

Rubber compounding ingredients. Depending on the. Ingredients in rubber compound is a large group of components including curing agents accelerators and vulcanization activators antioxidants plasticizers fillers and special additives blowing agents dyes etc. Rubber compounding ingredients ingredients in rubber compound. Even natural rubber can have its very good physical traits enhanced by putting in other ingredients in the mixture.

These are starting point rubber compounding formulations for providing guide lines only and should be confirmed by laboratory trials. An antidegradant is a compounding ingredient added into a rubber compound to retard the deterioration caused by oxidation ozone light or combination of these. Some accelerators are curing agents at the same time sulfur donors. The list of ingredients in phr parts per hundred rubber called rubber compound recipe.

It is expected that modifications may be necessary to produce satisfactory commercial products. The objectives of rubber compounding may be essentially defined as providing optimised performance and processability generally at minimum cost by the incorporation of non rubber ingredients. Hence antioxidants are added to protect the rubber against oxygen attack while antiozonants are added to protect the rubber against ozone attack. Not only can we improve an elastomer s physical strengths by compounding other ingredients into the mixture of elastomer and sulfur but also we can improve other characteristics and even create some that do not naturally occur.

The most common compounding ingredients added into the rubber are vulcanizing agents vulcanization accelerators activators for the accelerators fillers processing aids softeners antidegradants and other miscellaneous ingredients for specific purposes. Optimised performance in this context refers not only to mechanical properties but also for example resistance to bacteria or particular chemicals.