Fact Sheet
DuPont Teflon
®
Industrial Coatings
Teflon ® S Coatings 958-303 and 958-313 Description
2. Lightly grit-blast with aluminum oxide.
Teflon® S 958-303 and Teflon® S 958-313 are onecoat, solvent-based coatings specially formulated to provide a tough, durable film for dry lubrication, with excellent salt spray resistance. In addition, Teflon® S 958-313 has exceptionally good abrasion resistance. They can be cured at temperatures as low as 177°C (350°F). Refer to Table 1 for physical property data.
For carbon steel, a zinc or manganese phosphate conversion coating should be applied after grit-blast. These products also adhere well to most hard anodized aluminum surfaces.
FDA Status Teflon® S 958-303 and Teflon® S 958-313 do not comply with FDA regulations governing components of coatings for direct food contact. Table 1 Typical Properties Teflon ® S Resin-Bonded Lubricant Code
958-303
958-313
Color
Black
Black
Weight Solids, %
26.3
24.2
Volume Solids, %
Application 1. Bring coating to room temperature. Shake or agitate to reincorporate any settled material. 2. Product is supplied ready-to-spray. If thinning is desired, add a small amount of TN-8718 (n-methyl pyrrolidone NMP) with steady mixing. If faster evaporation is needed use TN-8595 or a 50:50 mixture of NMP:MIBK with care. This thinner must be added slowly with constant stirring. 3. Use conventional industrial spray equipment. 4. Recommended film thickness is 15–20 µm (0.6–0.8 mil). The heavier film build will improve salt spray corrosion resistance.
19.4
18.0
1.04 (8.7)
1.04 (8.6)
Baking
Coverage, m /L (ft /gal)*
7.8 (311)
7.2 (289)
Note: All temperatures refer to metal temperature.
Viscosity, cP
200–800
200–800
Maximum Use Temperature**, °C (°F)
260 (500)
260 (500)
1. Flash or force dry for 5 min. 2. Recommended bake for 15 min at 343°C (650°F). These products can be cured at temperatures as low as 177°C (350°F) by extending the cure time. However, the toughness and durability of the coating decreases as the cure temperature is reduced below 343°C (650°F). The color will change at the higher bakes to a brown cast, but performance will not be affected.
Density, kg/L (lb/gal) 2
2
Note: These figures are averages and may vary. * Theoretical coverage at 25 µm (1 mil) assuming 100% efficiency. ** Abrasion resistance is reduced at temperatures above 205°C (400°F).
Surface Preparation For aluminum, stainless steel, and carbon steel: 1. Clean (vapor degrease, prebake, or other).
The DuPont Oval Logo, The miracles of science®, and Teflon® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company. Use of DuPont trademarks is subject to License Agreement and qualification.
Storage and Stability ®
Teflon S 958-303 is stable for at least 18 months when stored at normal room temperature of 18–24°C (65–75°F). Teflon® S 958-313 is stable for at least 12 months when stored at normal room temperature of 18–24°C (65–75°F).
Safety Follow normal industrial safety practices for handling and applying Teflon® products. Industrial experience has clearly shown Teflon® materials can be processed and used at elevated temperatures without hazard providing adequate ventilation is
used. Ventilation should be available at baking temperatures 275°C (525°F) and above. Before using Teflon® S, read the Material Safety Data Sheet (MSDS) and the detailed information in the “Guide to the Safe Handling of Fluoropolymer Resins,” latest edition, published by the Fluoro-polymers Division of The Society of the Plastics Industry. When grit-blasting Teflon® finishes off aluminum or magnesium surfaces, the possibility of explosion exists if the fines are allowed to become heated. Good housekeeping practices, keeping the residue wet, and keeping the ventilation and dust collection systems in good working order reduces this risk.
Table 2 Typical Test Data Value Teflon® S 958-303 (Black)
Value Teflon® S 958-313 (Black)
Test
Method
Dry Film Thickness (DFT)
Electromagnetic method ASTM D1400-87
25 µm (1 mil)
25 µm (1 mil)
Film Appearance
Eye and power magnification microscope
OK
OK
Adhesion Post Water CrossHatch Adhesion Impact
Adhesive tape after boiling ASTM D335 ASTM D4145
OK(A) OK(A)
OK(A) OK(A)
80 mg 19 µm (0.8 mil)
24 mg 9 µm (0.4 mil)
Abrasion Taber Abrasion
Pencil Hardness Corrosion Atlas Cell (hours)
Salt Spray
Gloss
Weight loss after wear of two abrasive wheels DFT loss ASTM D4060-95 Load: 1,000 g Number of cycles: 1,000 Set of abrasive wheels: CS17 ASTM D3363
2B
Chemical resistance of coating ASTM B117-73 Temperature: 98°C (208°F) Test solution: 0.05 N HCl
<168 hr
<168 hr
ASTM B117-73 Test solution: 5% salt in water Temperature: 35°C (95°F)
168 hr <x <336 hr
168 hr <x <336 hr
0.2 4.5 18.4
0 3.0 13.0
ASTM 523 20° 60° 85°
For more information on Teflon® coatings: DuPont Teflon® Industrial Coatings Chestnut Run Plaza P.O. Box 80702 Wilmington, DE 19880-0702
(800) 441-7515 Fax: (302) 366-8602
www.dupont.com/teflon/coatings
Europe
Pacific
Japan
DuPont de Nemours (Belgium) A. Spinoystraat 6 B-2800 Mechelen Belgium Tel.: 33-15-441188 Fax: 33-15-441160
DuPont Australia, Ltd. 254 Canterbury Road Bayswater, Victoria 3153 Australia Tel.: 61-3-9721-5617 Fax: 61-3-9721-5690
DuPont K. K. (Teflon® Finishes) 4th Floor, Chiyoda Honsha Building 5-18 Sarugaku-cho, 1-chome Chiyoda-ku, Tokyo, 101 Japan Tel.: 81-3-5281-5888 Fax: 81-3-5281-5899
Asia DuPont China, Ltd. 26/F., Tower 6, The Gateway 9 Canton Road, Tsimshatsui Kowloon, Hong Kong Tel.: 852-2734-5459 Fax: 852-2368-3512
DuPont Korea 4/5th Floor Asia Tower #726 Yeoksam-dong, Kangnam-ku Seoul, Korea Tel.: 82-2-2222-5385 Fax: 82-2-2222-5478
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.
(1/03) 302254A Printed in U.S.A. [Replaces: H-82729-2] Reorder No.: H-82729-3