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  Tank lining Compounds

Natural Rubber (NR)

 

·         Natural Rubber is widely used for chemical plant lining applications due to it’s excellent physical properties and ease of use.

·         The key parameters are:

·         Excellent Abrasion/Tear and Tensile Strength

·         Easy to bond to metal substrates

·         Moderate chemical resistance to Inorganic &Organic Acids/Alkalis/Alcohols i.e. Hydrochloric Acid/Sodium Hydroxide/Ethanol

·         Excellent Water resistance

·         Broad hardness range available

·         Useful temperature range(-60°C/+70°C)

·         Lower cost than synthetic polymers.

·         Limitations: not suitable for Oils/Greases/Very Strong Acids/Most Hydrocarbons/Ozone


Chlorosulphonated Polyethylene (CSM)

 

·         Originally developed by DuPont under their tradename Hypalon, this material is suitable for use at higher temperatures and in more aggressive chemical environments.

·         Good tear & abrasion resistance

·         Better resistance to strong acids such as Phosphoric and Hydrofluoric

·         Resistant to metal pickling solutions

·         Good oil resistance

·         Good oxidation/Ozone resistance

·         Good water resistance

·         Useful temperature range  (-25°C/+140°C)

Butyl (IIR)

 

·         Low permeability to gases, excellent water resistance combined with good chemical resistance.

·         Fair to good tear & abrasion resistance

·         Low permeability to gases

·         Excellent water resistance

·         Excellent oxidation/Ozone resistance

·         Good acid resistance

·         Useful temperature range (-50°C/125°C)


Polychloroprene (CR)

 

·         Originally developed by DuPont under their tradename Neoprene, it has some unique properties when suitably compounded:

·         Good physical properties (Tear & Abrasion)

·         Resistant to many chemicals & some oils & greases

·         Good oxidation/Ozone resistance

·         Self Extinguishing/Flame retardent

·         Broad hardness range available

·         Excellent seawater resistance

·         Useful temperature range (-40°C /+120°C)


Hard Natural Rubber (Ebonites) (NR)

 

·         Natural Rubber Ebonites offer the same excellent properties as Natural Rubber and similar limitations, but due to the very high x-link density give:

·         Much improved chemical resistance

·         Better resistance to hot acids

·         10-15 times longer swelling time than soft NR

·         Improved heat resistance (up-to 100°C)

·         Hardness range typically 60 – 85 Shore D

Ethylene Propylene Diene (EPDM)

 

·         Excellent resistance to oxidation and Ozone, coupled with good resistance to oxygenated solvents & some acids/bases.

·         Moderate/Good tear & abrasion resistance

·         Excellent oxidation/Ozone resistance

·         Excellent solvent resistance including to Esters & Ketones

·         Excellent heat resistance

·         Excellent water resistance

·         Useful temperature range (-50°C/+150°C)

·         Limitations: Not suitable for use with oils or greases

 

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