Applications:  Recommended for piston seals, rod seals, wipers, O-rings and anti-extrusion devices for all types of light, medium and heavy-duty hydraulic cylinders requiring higher extrusion resistance.
Applications:  Recommended for piston seals, rod seals, wipers and O-rings for all types of light, medium and heavy-duty hydraulic cylinders, shock absorbers, bellows & diaphragms, bonded parts, and energy management applications that require compatibility with water-based fluids.
Download the brochure
Applications:  Recommended for piston seals, rod seals, wipers and O-rings for all types of light, medium and heavy-duty hydraulic cylinders, shock absorbers, bellows & diaphragms, bonded parts, and energy management applications such as polymer springs and bumpers.
Download the brochure

High Performance Systems Demand High Performance Materials
Parker’s Resilon® Polyurethane is the established industry leader in high performance hydraulic sealing systems. Resilon Polyurethane is a proprietary PPDI-based TPU formulation specifically suited for injection molding of both large and small articles while retaining superior high temperature performance. 

Specific advantages of Parker Resilon formulations over conventional polyurethanes include excellent flex resistance, superior dynamic properties, and good cut and tear resistance at the temperature limits for polyurethane materials.  Resilon Polyurethanes can operate at temperatures approaching 275°F (135°C) versus MDI-based compounds which are limited to around 212°F (100°C).  Parker has customized several Resilon formulations for specific sealing challenges.  

Thermoplastic polyurethanes (TPUs) have been an industry standard for dynamic sealing in hydraulic applications for the past 30+ years.  Today, design engineers have an array of commercially available polyurethane materials to choose from depending on performance expectations and application requirements.  

Thermoplastic polyurethanes share common characteristics making this class of material a leading choice for high pressure, dynamic sealing applications.  These characteristics include:

  • High bond strength
  • Wear resistance
  • Thermal stability
  • Hydrolytic stability
  • Compression set resistance
  • Resiliency

 

Material Selection
When selecting from the wide range of material options that Parker offers, there are several considerations to be made:
  • Typical Physical Properties give a broad picture of a material's performance
  • Chemical Compatibility matches the sealing material with the system fluid and operating environment
  • Thermal Capabilities and Extrusion Resistance define limits of application parameters
  • Friction and Wear help to determine the performance and life of the seal package

Typical Physical Properties                         4301A90  
Hardness, Shore A, pts. 92
Modulus @ 100%, psi 1958
Ultimate Tensile Strength, psi 7188
Elongation, % 548
Rebound, % 41
Compression Set %, 70 hrs @ 212°F 36.5
Tg, DSC, °C  -35.6
Temperature Range, °F   -35 to +225

Most recently, we have launched Resilon 4350 -- surpassing the high temperature performance of the current standard bearer, Resilon 4300.  Resilon 4350 increases the normal operating window from 230°F to 250°F for continuous use in many applications while other critical performance attributes such as wear resistance, extrusion resistance, glass transition temperature, and rebound remain best in class.   All of this adds up to a new solution for seal designers as they push the envelope in temperature extremes.  Watch the video to see comparative test results.  

Resilon 4300
Engineering Your Success
©2018, Parker Hannifin Corporation
Engineered Polymer Systems Division
www.parker.com/eps
Ph: 800 233 3900
Email:  eps-ccare@parker.com
Resilon 4301
Resilon 4304
Resilon 4350
Polyurethane melts at high temperatures and loses its ability to seal.
Contact Us
Need design assistance? Download the Design Action Request form and fill it out with your application requirements.   E-mail the form to eps-ccare@parker.com,  or call us at 801 972 3000  to speak with an Application Engineer.



         Download the Design Action Request Form
Resilon®  Polyurethane                        
Engineered Polymer Systems Division
2220 South 3600 West
Salt Lake City, UT 84119

Phone 801 972 3000
Email: eps-ccare@parker.com
www.parker.com/eps



Typical Physical Properties                         4300A90  
Hardness, Shore A, pts. 90
Modulus @ 100%, psi 1674
Ultimate Tensile Strength, psi 8021
Elongation, % 638
Rebound, % 61
Compression Set %, 70 hrs @ 212°F 30.9
Tg, DSC, °C -41.6
Temperature Range, °F -65 to +275
At Parker, we excel in our mission to develop high performance polyurethanes that provide our customers with increased productivity from longer seal life and extended maintenance schedules for extreme environments.  

Highest Performance and Quality Available
Thermoplastic polyurethane materials are prepared by reacting three basic components:  diols or polymeric polyols, diisocyanates, and chain extenders. Different combinations of these ingredients yield TPUs customized for specific performance requirements.  Most TPUs in use today are polymerized with one of three diisocyanates, each yielding different performance characteristics. Learn more about  PPDI, MDI and TODI base formulations here.

Parker's commitment to offering the highest quality sealing material is unsurpassed in the industry.  Our in-house material development and compounding capabilities give us the ability to maintain control over all variables during the manufacturing process to achieve optimal and consistent physical properties from our thermoplastic materials.
 

Resilon® Polyurethane 4300 Formulations            

Typical Physical Properties                         4304D60  
Hardness, Shore D, pts. 55
Modulus @ 100%, psi 2949
Ultimate Tensile Strength, psi 6896
Elongation, % 871
Rebound, % 46
Compression Set %, 70 hrs @ 158°F 38.7
Tg, DSC, °C  -30.5
Temperature Range, °F -65 to +275
So how do designers go about selecting the optimal seal material for an application when there are so many to choose from?  A useful resource for gathering and conveying critical application requirements is Parker's   Design Action Request form.  

Download the Design Action Request Form and then consult with one of our knowledgeable Application Engineers to design a sealing system to match your requirements.

Need Assistance?  We Can Help.

Material selection is a daunting task, for sure, but can be done in a systematic manner with guidance from the sealing and material experts at Parker.  Give us a call at 801 972 3000 or send us an e-mail to consult with our Application Engineers.

Typical Physical Properties                         4350A90  
Hardness, Shore A, pts. 90
Modulus @ 100%, psi 1870
Ultimate Tensile Strength, psi 8340
Elongation, % 570
Rebound, % 62
Compression Set %, 70 hrs @ 212°F 26.3
Tg, DSC, °C -44.1
Temperature Range, °F -65 to +300
Applications:  Recommended for piston seals, rod seals, wipers and O-rings for all types of light, medium and heavy-duty hydraulic cylinders, shock absorbers, bellows & diaphragms, bonded parts, and energy management applications requiring continuous operating temperatures to 250°F and brief excursion temperatures to 300°F .
Contact Us
Contact us to request information or for assistance with seal design and material selection to optimize your system's performance.