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High resistance to aggressive automotive fluids including modern low-SAPS engine oils and biofuels.
Excellent thermal stability with continuous service capability up to 200 °C in air.
Superior compression set resistance, ensuring long-term sealing performance under dynamic conditions.
Good processability on standard rubber processing equipment, including extrusion and injection molding.
Low gas permeability, especially effective for fuel and refrigerant containment applications.
Automotive fuel system components: fuel rails, injectors, and high-pressure hose linings.
Under-hood sealing solutions: valve cover gaskets, turbocharger seals, and EGR system components.
Industrial fluid handling: chemical pump diaphragms and metering valve seats.
Aerospace hydraulic and pneumatic seals requiring extended service life at elevated temperatures.
Oil & gas downhole tools and wellhead equipment exposed to sour gas (H₂S) and hydrocarbon media.
| Chemical Type | Fluoroelastomer (FKM), vinylidene fluoride–hexafluoropropylene–tetrafluoroethylene terpolymer |
| Product Form | Uncured gum stock in bale form (typically 2–5 kg) |
| Appearance | Light tan to pale amber, smooth surface, non-tacky elastomeric solid |
| Primary Applications | Dynamic and static seals in demanding automotive, aerospace, and industrial environments |
| Key Features | High fluorine content (~68 wt%), low compression set, excellent chemical resistance |
| Benefits | Extended service life, reduced maintenance frequency, compliance with OEM fluid compatibility requirements |
| Curing System Compatibility | Designed for bisphenol-cured formulations; compatible with standard FKM accelerator packages |
| Processing Temperature Range | Optimal processing: 60–100 °C (uncured); vulcanization: 160–180 °C |
Q1: What distinguishes Tecnoflon T 938 from other FKM elastomers in terms of processing and cure profile?
A: Tecnoflon T 938 is a low-viscosity, peroxide-curable fluoroelastomer designed for enhanced processability—particularly in injection molding and extrusion. It offers a balanced scorch safety and rapid cure development, enabling high productivity without compromising final crosslink density or thermal stability.
Q2: Is Tecnoflon T 938 suitable for applications requiring resistance to aggressive chemicals such as amines, ketones, or polar solvents?
A: Yes—Tecnoflon T 938 delivers exceptional resistance to a broad spectrum of aggressive media, including aliphatic and aromatic hydrocarbons, chlorinated solvents, and many polar organic compounds. Its performance against strong amines and ketones is notably superior to standard FKM grades due to its optimized fluorine content and copolymer architecture.
Q3: Can Tecnoflon T 938 be used in dynamic sealing applications at elevated temperatures?
A: Absolutely—Tecnoflon T 938 maintains excellent compression set resistance and mechanical integrity under continuous service up to 200 °C, and short-term exposure up to 230 °C. Its robust network structure supports reliable performance in demanding dynamic seals, such as those found in automotive turbocharger hoses or aerospace fluid systems.
Q4: How does Tecnoflon T 938 perform in formulations containing common fillers and processing aids?
A: Tecnoflon T 938 exhibits good compatibility with standard FKM fillers (e.g., carbon black, calcium carbonate) and common processing aids. It responds well to typical peroxide systems and co-agents, allowing flexible formulation design while maintaining consistent dispersion and minimal viscosity increase during mixing.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
