Dupont(tm) tefzel(r) chemical use temperature guide

Technical Information
Table 1 lists over 450 chemicals whose corrosive
Tefzel® fluoropolymer resin is a proven performer in characteristics create problems which can often be the chemical and petrochemical processing indus- solved by specifying Tefzel® fluoropolymer. The tries. It has gained notable recognition for its unique maximum use temperature for each chemical properties and design versatility which are helping service listed is suggested as a guide only. to solve some of the industry’s toughest materials Not all chemicals listed have been tested in a problems in process equipment and components.
DuPont laboratory. This guide is based on selective Like DuPont’s family of Teflon® fluoropolymer laboratory tests of representative chemicals; field resins, Tefzel® provides excellent resistance to attack applications and experience; and engineering by chemicals and solvents which can cause rapid judgments as to the suitability of Tefzel® in these deterioration of other plastics and all but the most Table 1 lists chemicals and the “upper suggested
Tefzel® is inert to strong mineral acids, inorganic use temperatures” for organic and inorganic bases, halogens and metal salt solutions. Even chemicals and plating solutions. The temperature carboxylic acids, anhydrides, aromatic and aliphatic ratings, especially for inorganic chemicals, apply hydrocarbons, alcohols, aldehydes, ketones, ethers, to aqueous and nonaqueous systems. It is recom- esters, chlorocarbons and classic polymer solvents mended that tests be conducted under actual or have little effect on Tefzel®. Very strong oxidizing simulated use conditions wherever possible to acids near their boiling points, such as nitric at high determine suitability of Tefzel® or any other mate- concentration, will however affect Tefzel® in varying rial for a specific application. It is also suggested degrees. So will strong organic bases such as amines that the equipment fabricator be consulted for In addition to its chemical resistance, Tefzel® hasexcellent mechanical strength, stiffness and abrasion resistance. This may be an important consideration for process applications where abrasive slurries The data presented in Table 2 show the effects of
often accelerate wear and degradation of alternative various representative chemicals on the properties materials. Tefzel® can also be reinforced with glass of Tefzel® as tested in DuPont laboratories.
fibers to increase the flexural modulus to 950,000psi/6,550 MPa.
Tefzel® has a broad continuous use temperaturerange from –150° to 300°F (–100° to 150°C).
Specific temperature ratings vary with equipmentdesign, thus it is important to consult withcomponent manufacturers for in-use servicerecommendations.
The DuPont Oval Logo, DuPont™, The miracles of science™,and Tefzel® are trademarks or registered trademarks ofE.I. du Pont de Nemours and Company.
Chemical Compatibility Data on DuPont™ Tefzel®
(Based on Tests of Representative Materials and Engineering Judgment)
Maximum Use
Maximum Use
Temperature
Temperature
Chemical
Chemical
A Acetaldehyde
C Calcium Bisulfate
B Barium Carbonate
Table 1 (continued)
Chemical Compatibility Data on DuPont™ Tefzel®
(Based on Tests of Representative Materials and Engineering Judgment)
Maximum Use
Maximum Use
Temperature
Temperature
Chemical
Chemical
G Gallic Acid
Table 1 (continued)
Chemical Compatibility Data on DuPont™ Tefzel®
(Based on Tests of Representative Materials and Engineering Judgment)
Maximum Use
Maximum Use
Temperature
Temperature
Chemical
Chemical
H Heptane
M Magnesium Carbonate
Table 1 (continued)
Chemical Compatibility Data on DuPont™ Tefzel®
(Based on Tests of Representative Materials and Engineering Judgment)
Maximum Use
Maximum Use
Temperature
Temperature
Chemical
Chemical
Table 1 (continued)
Chemical Compatibility Data on DuPont™ Tefzel®
(Based on Tests of Representative Materials and Engineering Judgment)
Maximum Use
Maximum Use
Temperature
Temperature
Chemical
Chemical
U UDMH-Hydrazine (50/50)
PLATING SOLUTIONS
These test results confirm the chemical resistant The test results shown in Table 2 represent the
tensile strength, elongation and weight changes after
exposures at indicated temperatures.
Actual Laboratory Tests on
Chemical Compatibility of DuPont™ Tefzel® with Representative Chemicals
Retained Properties—%
Temperature
Chemical
Strength
Acid/Anhydrides
Acetic Acid (Glacial)
Aliphatic Hydrocarbons
Mineral Oil
Aromatic Hydrocarbons
Benzene
Functional Aromatics
O-Cresol
Amines
Aniline
Chlorinated Solvents
Carbon Tetrachloride
Ethers
Tetrahydrofuran
Aldehyde/Ketones
Acetone
Table 2 (continued)
Actual Laboratory Tests on
Chemical Compatibility of DuPont™ Tefzel® with Representative Chemicals
Retained Properties—%
Temperature
Chemical
Strength
Esters
n-Butyl Acetate
Polymer Solvents
Dimethylformamide
Other Organics
Benzoyl Chloride
Acids
Aqua Regia
Halogens
Bromine (Anhy)
Bases
Ammonium Hydroxide
Peroxides
Hydrogen Peroxide
NOTES: Change in properties -15% is considered insignificant. Samples were 10–15 mil microtensile bars. TS/E and wt. gain determined
within 24 hours after removal from exposure media.
Table 2 (continued)
Actual Laboratory Tests on
Chemical Compatibility of DuPont™ Tefzel® with Representative Chemicals
Retained Properties—%
Temperature
Chemical
Strength
Salt-Metal Etchants
Ferric Chloride
Other Inorganics
Phosphoric Oxychloride
Miscellaneous
A-20 Stripper Solution
NOTES: Change in properties -15% is considered insignificant. Samples were 10–15 mil microtensile bars. TS/E and wt. gain determined
within 24 hours after removal from exposure media.
DuPont FluoroproductsP.O. Box 80713Wilmington, DE 19880-0713www.teflon.com DuPont de Nemours Int’l SA DuPont Mitsui 5–18, Sarugaku-cho 1-chome Kowloon, Hong Kong CH-1218 Le Grand-Saconnex Chiyoda-ku, Tokyo 101 Japan (852) 27341948 Mississauga, Ontario, Canada P.O. Box 263 [email protected] The information set forth herein is furnished free of charge and is based on technical data that DuPont believes to be reliable. It is intended for use by persons having technical
skill, at their own discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their
particular conditions of use present no health or safety hazards. Because conditions of product use are outside our control, we make no warranties, express or implied, and
assume no liability in connection with any use of this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential.
Nothing herein is to be taken as a license to operate under or a recommendation to infringe any patents.
CAUTION: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, see “DuPont Medical Caution Statement,”
H-50102.

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