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Viton® made with APA > Technical Info
Viton® consists of essentially four different "families" of polymers:
| A |
A, AL |
General purpose sealing: Automotive, Aerospace fuels & lubricants |
Dipolymers of VF2/HFP |
~66% |
| B |
B, BL, GBL-S* |
Chemical Process plant, Power Utility Seals & Gaskets |
Terpolymers of VF2/HFP/TFE |
~68% |
| F |
F, GF-S |
Oxygenated Automotive fuels. Concentrated aqueous inorganic acids, water, steam |
Terpolymers of VF2/HFP/TFE |
~69-70% |
| Viton® Extreme™ |
TBR-S, ETP-S |
Automotive & Off-Road - High pH lubricants, greases, & Coolants.
Oil Exploration/Production - Drilling Muds, Sour Wells.
Special sealing requirements - solvents, coatings, ultra harsh environments (ETP-S) |
Copolymers of TFE/Propylene and Ethylene/TFE/PMVE |
~66% |
*The new types of Viton® Made with Advanced Polymer Architecture are indicated by an 'S'.
Specialty versions of A, B, and F types are available in which HFP is replaced with a specialty monomer to improve low-temperature flexibility. These are LT types: GLT-S, GBLT-S, and GFLT-S. These types are made using Advanced Polymer Architecture.
These new types demonstrate the following improvements:
In performance:
- Improved sealing force retention and longer seal life
- Improved compression set
- Improved resistance to hot water and acids
- Improved low temperature sealing
In processing:
- Better mold flow and extrusion
- Faster curing
- Improved demolding at elevated temperatures and a much lower sticking
- Lower mold fouling
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Viton® Extreme™ fluoroelastmers combine the excellent thermal resistance of Viton® with the unique resistance to chemicals and to environments that have historically exceeded the performance of conventional fluoroelastomers.
Viton® Extreme™ TBR is a new TFE/Propylene copolymer that uses APA technology and a revolutionary bisphenol cure site compared to existing TFE/Propylene. TBR has inherent base resistance, and it provides lower volume swell in hydrocarbons and improved processing.
Viton® Extreme™ ETP is an upgrade from ETP-900 with significantly improved processing and end-use properties. It is inherently resistant to base attack caustic solutions, amines, and hot water. In aggressive environments where TFE/Propylene or FKMs are not an option, ETP is the best of both worlds. |
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