Types Of Elastomers

N.R ( Natural Rubber ) :  

Normal working Temp. – 45 to 100 c. This is the rubber widely used which has  good physical properties like Tensile, Elongation, Excellent Resilience, Abrasion Resistant, Good Rebound, Tear Resistant, Good adhesion to metal, with Excellent Elastic properties.

S.B.R. ( Styrene Butadiene Rubber ) :  

Normal working temp. – 45 C to 110 C. This general purpose Polymer has good Resistant to dilute organic and inorganic acids. Resistant to non polar  solvent, Alcohol and brake fluids. Advantage of this polymer is dynamic Fatigue Resistant, Abrasion Resistant, High heat built up, Water resistant.

   IIR ( Butyl Rubber )    CIIR ( Chloro Butyl ) BIIR ( Bromo Butyl )  

Normal working temp. – 40 C to 145 C . These polymers consist of isobutylene with small amount of isoprene. Theses polymers provides a low degree permeability to gases and good resistant to Ozone, Whether, acids, Glycol based Fluids. good resistant to Steam and Heat resistant. 

N.B.R ( Acrylonitrile Butadiene Rubber ) :

Normal Working Temp. -40 C to 125 C. This polymer is well known as Nitrile. They are difference based on  ACN content. Nitrile has excellent resistant to most of petroleum products, fuels and oils and broad balance of high and low temperature . 

It has excellent resistant to compression set , good Resilience, Tear and Abrasion Resistant. As ACN increases , Resistant to Oils, Gasoline, Grease, Mineral oils, Vegetable oils, improved. Also physical properties increases Tensile, Hardness, Gas permeability, Heat resistant, Abrasion resistant improves.  

HNBR ( Hydrogenated Nitrile Rubber ) :

Normal working temp. – 25 C to 150 C. HNBR polymer containing little or more  hydrogenation. Polymer have improved  properties depends upon on the degree of hydrogenation. 

Polymer has outstanding resistant to Oxidation, Heat, Ozone,
Weather, Resistant to Sulphur containing oils, Amines, Fuels, Greases, Aliphatic hydrocarbons and industrial chemicals. With good Mechanical properties.  

NEOPRENE. C.R. ( Chloroprene Rubber ) :

Normal working temp. – 65 C to 250 C. This polymers is well known as NEOPRENE. This multi purpose synthetic rubber has proven performance in thousand of applications because of chlorine content so chief characteristic of the polymer is an Flame proof. Excellent ageing properties in Whether and Ozone. Excellent Flex crack resistant. Excellent water resistant, Good resistant to parafenic and Nepthenic Oils, Alkalis, Acids.

EPR. EPDM.
( Ethylene Propylene  Diene Rubber ) :

Normal working temp. - 40 C to 140 C. This polymer is terpolymer of ethylene, propylene and some Diene as the termonomer.

This  polymer retains excellent resistant to Ozone, Whether, Sunlight,  Degradation and Heat resistant. Superior resistant to Water,  Steam, Dilute alcohols, Alkalis, Ketones and polar organic media. Not recommended to use with petroleum oils or Fuels.  

ACM ( Polyacrylic Rubber ) :

Normal working temp. – 25 C to 175 C. Acrylic elastomer are copolymer based on two major components of Ethyl acrylate and Butyl acrylate with monomers. 

The lake of double bonds, ACM have excellent resistant to Oxidation, Ozone, Sunlight, Weather and Heat. Excellent resistant to corrosion, Hydrocarbon oils, Mineral oils. Not recommended to use with Water,  Steam, Acids and Alkalis.  

CSM ( Chlorosulphonated  Polyethylene ) :

Normal working temp. – 20 C to 150 C. This polymer is well known as HYPALON. THE PROPERTIES OF Hypalon have highly resistant to attack of Oxygen, Oxidation, Ozone, Weather, Heat and good Flame resistant. Also have good swelling resistant to Hot water, Steam, Acids ( mineral and organic), Alcohol, Alkalis, Gasolene.  

Q ( Silicon Rubber ) :

Normal working temp. – 75 C to 300 C. This high molecular weight poly organo siloxanes has substitute group of  methy and vinyl on the polymer chain. 

This polymer have high thermal Resistant and very good resistant to attack by Oxygen, Ozone, Sunlight, and wide temperature range. 

It has poor Tear and Abrasion resistant. This polymer often used for medical products and for Die – electric properties.  

FKM ( Flurocarbon Rubber ) :

Normal working temp. – 20 C to 250 C. This polymer is well known as  VITON. VITON are used for a vast range of sealing applications due to its broad spectrum of Chemicals And Oil media and wide range of temperature. 

VITON exhibits excellent resistant of Mineral oils, Fuels, Steam, Alcohol Aliphatic and Aromatic hydrocarbons, Alkalis. finds wide applications in automotive parts and parts in a variety of heavy - duty equipment.

FVQM ( Flurosilicon Rubber ) :

Normal working temp. – 45 C to 250 C. Combines the good  low and high temperature properties of silicon, but much better resistant to a variety of Fluids.  

U ( URETHANE ) :

Urethane rubber has excellent wear resistance and mechanical  properties including an extremely high degree of hardness and elasticity. 

The raw material is translucent and easily colorable even with fine colors without affecting its strength. If therefore finds a variety of uses including being the material in various belts, and packings.