Teflon. The FACTS. Teflon PFA Coatings. Nonstick & Industrial Coatings Green Brown Green MP-310 Clear MP-610 Black

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1 PFA Coatings Primers Low-Build Topcoat High-Build Topcoat Black Green Brown Clear Green MP-310 Clear MP-610 Black Powder, Clear Powder, Ruby Red Liquid, Ruby Red Description PFA is the newest member of the DuPont family of high performance fluorocarbon coatings with excellent chemical stability, electrical properties and mechanical strength for use in high and low temperature environments. systems (up to 1300 µm, 50 mils) for linings where the ultimate chemical protection is required. Thick-film TEFLON PFA coatings have been improved for application in thicker films per coat. The application technique involves a "Spray & Bake" procedure whereby multiple coats, sprayed and baked individually, are used to achieve the desired final film thickness. The resulting finish is tough, seamless and without pinholes - perfect for applications in harsh chemical environments. The very good chemical inertness of TEFLON PFA also makes it ideal for applications where maintaining product purity is critical. The TEFLON PFA and are special filled grades with a very high resistance against water vapour permeation. In an Atlas cell test with boiling water, after 1 year of exposure no blisters, bubbles or delamination could be found, even if only applied in 350µ thickness. The TEFLON PFA products listed above represent an expanded family of products based on new, improved formulations of PFA resins. Using appropriate product combinations, coating systems are now available for use in a wide variety of applications - ranging from thin-film systems ( µm, 3-10 mils) for service involving abrasion resistance or mild chemical service, to thick-film The TEFLON PFA MP-610 is a conductive topcoat, with a surface resistivity of 10exp4-5 Ω/square when measured on aluminium panels without a primer. The PFA MP-310 gives an ultrasmooth clear finish to the coating, whereas and can also be used as a final topcoat over the filled and products in order to avoid the filler to come in contact with processing fluids or solids.

2 Atlas Cell testing Atlas cell is a test that allows estimating the resistance of a coating put in contact with a given chemical at a given temperature. The picture hereunder describes the test. The coating is applied on the inside of the panels, which close the glass pipe. A thermometer and a heating element control the temperature. As you can see, the coating is exposed to both a liquid and a vapour phase. Visual inspection is done every week. After 720 hrs (+/-1 month), the test is stopped and adhesion is tested In-use and laboratory testing are ongoing to determine the permeation resistance against a whole range of chemicals. TABLE 1: ATLAS CELL TEST RESULTS ON MEDIUM TEMPERATURE DFT TIME OF EXPOSURE BLISTERS ADHESION HCl 0.05 N 100 C >111µ (1layer) 720 hrs NONE OK HCl 0.6 N 100 C 125µ (2 layers) >744 hrs NONE OK HCl 37% 50 C 186µ (2 layers) <120 hrs Yes NOK H 2 SO 4 20% 90 C 172µ (2 layers) <240 hrs Yes NOK H 2 SO 4 20% 90 C 552µ (5 layers) >240 hrs NONE OK H 2 SO 4 95% 50 C 191µ (2 layers) >696 hrs NONE OK H 3 PO 4 85% 50 C 184µ (2 layers) >648 hrs NONE OK HNO 3 65% 50 C 183 µ (2 layers) >120 hrs Yes NOK

3 General Properties of TEFLON PFA coatings PROPERTY UNIT METHOD x X DFT µ µ µ ADHESION IMPACT FLEXIBILITY PEELING STRENGTH ABRASION Erichsen ASTM-D-2794 TM-5007-B >6.7 kg (film breaks) Not Tested Mg µ Taber (Weight loss) Taber (DFT loss) 26 mg 47 mg 10 µ HARDNESS Shore D-60 D-60 (test not adequate) SCRATCH RESISTANCE FIRST INDENTATION INDENTATION TO METAL Psi Psi TM-5023 B 2 psi 30 psi SALT SPRAY Hours ASTM B >720 hrs >720 hrs (no failure) SURFACE TENSION >22mN/m < 22 mn/m DIELECTRIC STRENGTH KV/mm ASTM D <4 psi >30 psi (coating too thick) SURFACE RESISTIVITY Ohm/square Hiresta IP MCP- > at 500V >10 13 at 500V HT250 *RADIATION RESISTANCE Megarads ASTM D Megarads: Good retention of mechanicals properties At 5 megarads, significant drop. See PFA Handbook 2 Megarads: Good retention of mechanicals properties At 5 megarads, significant drop. See PFA Handbook. THERMAL CONDUCTIVITY W/deg K. m Modulated DSC *HEAT OF COMBUSTION MJ/kg ASTM D *FLAMMABILITY - UL-94 V-0 V-0 *MELTING POINT C ASTM D SPECIFIC WEIGHT * Data given for the pure PFA fluoropolymer.

4 Chemical Compatability Data of TEFLON ETFE versus TEFLON PFA Maximum recommended in-use temperature in C Chemical ETFE PFA Acetic Acid (glacial) Acetic Anhydride Acetone Acetophenone Ammonium Hydroxide Aniline Aqua Regia Benzene Benzoyl Chloride Benzyl Alcohol Bromine (dry) n-butylacetate n-butylamine Di-n-Butylamine Tri-n-Butylamine Carbon Tetrachloride (dry) Chlorine (dry) Choloroform Chromic Acid (50%) o-cresol Cyclohexanone Dichloroethylene Dimethylaniline Dimethylformamide Dimethylsulfoxide Ethyl Acetate Freon Ferric Chloride (50%) Hydrobromic Acid (50%) Hydrochloric Acid (20%) Hydrochloric Acid (conc) Hydrofluoric Acid (35%) Hydrofluoric Acid (70%) Hydrofluoric Acid (100%) Hydrogen Peroxide (30%) Hydrogen Peroxide (90%)

5 Methyl Ethyl Ketone Methylene Chloride Mineral Oil Naptha 150 NT Nitric Acid (50%) Nitric Acid (70%) Phosphoric Acid (30%) Phosphoric Acid (85%) Phosphorous Oxychloride Phosphorous Trichloride Potassium Hydroxide (50%) Pyridine Silicon Tetrachloride 120 NT Sodium Hydroxide (50%) Sulfuric Acid (60%) Sulfuric Acid (fuming) Tetrahydrofuran TrichloroaceticAcid Toluene Zinc chloride Plating solutions These data can be found in the Chemical Resistance Guide for Plastics of Compass Publications.

6 Further information You can obtain further information on these TEFLON PFA coatings from the following persons: For Europe, Middle-East, Africa: Cecile CORDONNIER Tel: Fax: For the Americas: Paula MACRI Tel: Fax: For Asia: Fumio INOMAE Tel: Fax: The values shown in the tables of this brochure represent average experiences from numerous testing sources and are not intended to be specifications. These values will vary depending upon the individual compositions of the primers and topcoats and the systems used. Seller assumes no responsibility for results obtained or damages incurred from their use by Buyer in whole or part.