DAI-EL

Daikin’s DAI-EL fluoroelastomer and perfluoroelastomer products provide excellent high temperature and aggressive fluids resistance in sealing and fluid transport applications for automotive, oil and gas, aerospace, chemical process, small engine, and other harsh sealing environments. Daikin’s global technical and manufacturing resources support new developments and application of DAI-EL, each designed to meet specific OEM (end user) and fabricator (processor) requirements. In the Americas, as well as in Asia and Europe, Daikin partners with you to provide the best fluoroelastomer product solutions available in the world today.


DAI-EL: Selection Guide

Selecting a fluoroelastomer grade is often a difficult exercise in balancing performance requirements, processing considerations, and cost. To help you overcome this challenge, DAI-EL has created a selection guide with pertinent information and detailed recommendations. Whether you have a specific processing method and performance property in mind or are interested in exploring where different properties might take you, the DAI-EL selection guide is a powerful tool at your disposal. For additional information and product recommendations, please contact the DAI-EL technical service team.

DAI-EL Selection Guide


DAI-EL: Fluid Resistance Guide

Fluoroelastomers and perfluoroelastomers offer superior acid, base, chemical, and fuel resistance compared to other types of rubber. However, significant performance differences exist within these product families. To assist you in determining which grades are most suitable for your operating environment, Daikin has created a chemical resistance guide. This guide details expected performance including volume swell data in harsh operating conditions. While comprehensive, this guide is not exhaustive so for additional information please contact the DAI-EL technical service team.

DAI-EL Resistance Guide


Effect of Fluorine Content

The fluorine content of a DAI-EL grade affects many things, especially low temperature properties and fluid resistance. In general, the lower the service temperature and volume swell of a compound, the better. However, as the chart below depicts, when selecting a fluoroelastomer there is generally a tradeoff between the two properties. For low temperature operating conditions, consider selecting a DAI-EL low temperature or copolymer grade. For sealing against aggressive fluids or other media, consider a 71% fluorine terpolymer or even a perfluoroelastomer.


Bisphenol Curable Copolymers

Daikin bisphenol curable copolymers are 66% fluorine content copolymers of hexafluoropropylene and vinylidene fluoride. These products exhibit the best heat resistance and lowest compression set among the DAI-EL family. They are particularly suited for O-ring and oil seal applications in high-heat environments. Daikin offers injection and compression molding grades, extrusion grades, metal adhesion grades, and compression set resistant grades. Most DAI-EL copolymers are supplied as cure incorporated precompound but specifically labeled base polymers (BP) are available. These require the addition of a bisphenol curing agent and an accelerator.

For product information including descriptions and tech data sheets, please expand any of the tables below.

G-EXP Series

* = Technical Datasheet Coming Soon

G-EXP Series Mooney Viscosity Molding Method Defining Characteristics
G-EXP-002 33 Injection Very high tensile strength
G-EXP-004 42 Transfer & Compression Easier demolding of seals and complex parts
G-EXP-005 30 Injection Very fast cure
G-EXP-006 26 Injection Extended cure time
G-EXP-008 20 Injection Very high ultimate elongation
G-EXP-009 23 Injection Lowest compression set
G-EXP-010* 20 Injection Extended cure time
G-EXP-011 30 Injection Very low crosslink density, high elongation
G-EXP-014 40 Transfer & Compression Low compression set
G-EXP-016* 24 Injection Extended cure time
G-EXP-018 50 Calendering & Compression Demold seals and complex shapes without tearing and better dynamic flex life
G-EXP-019* 41 Transfer & Compression General purpose grade with a moderate cure
G-EXP-021* 22 Injection & Transfer Excellent mold flow
G-EXP-033 33 Transfer & Compression Low compression set
G-EXP-040 48 Transfer & Compression General purpose grade with a fast cure
G-EXP-042 60 Transfer & Compression Very high crosslink density
G-EXP-043* 36 Transfer & Compression High tensile strength
G-EXP-044* 46 Transfer & Compression Very fast cure
G-EXP-048 42 Transfer & Compression Demold seals and complex shapes without tearing and better dynamic flex life
G-EXP-053* 27 Injection Very fast cure

This chart compares the G-EXP family of DAI-EL precompounds in terms of their Mooney viscosity, cure time and crosslink density. If you do not see a suitable precompound on this chart, please contact us and we will develop one to meet your requirements.

 

G-300 Series

 

G-300 Series Mooney Viscosity Molding Method Defining Characteristics
G-310LBP 23 Injection Low cost base polymer
G-310MBP 36 Transfer & Compression Low cost base polymer
G-310HBP 47 Transfer & Compression Low cost base polymer
G-384 42 Compression Low cost, general purpose grade
G-700 Series
G-700 Series Mooney Viscosity Molding Method Defining Characteristics
G-701HBP 100 Compression Base polymer
G-701BP 41 Compression Base polymer
G-701 41 Compression General purpose grade
G-702 41 Compression Lower crosslink density for complex shapes
G-704BP 30 Transfer & Injection Base polymer
G-704 30 Transfer & Injection Metal adhesion
G-741A 40 Compression Very high tensile strength
G-755CBP 25 Extrusion & Calendering Base polymer
G-755BP 29 Extrusion & Calendering Base polymer
G-755 25 Extrusion & Calendering Smooth, uniform extrusions
G-7000 Series
G-7000 Series Mooney Viscosity Molding Method Defining Characteristics
G-7200BP 24 Injection Base polymer
G-7200EBP 21 Injection Base polymer
G-7210BP 28 Injection Base polymer
G-7251 20 Injection Best mold flow
G-7261 22 Injection Extended cure time
G-7262 23 Injection Easier demolding of complex shapes
G-7300EBP 35 Injection & Compression Base polymer
G-7320BP 38 Injection & Compression Base polymer
G-7329 34 Injection Suitable for complex parts with good metal adhesion
G-7351E 35 Injection May be used in compliance with FDA 21 CFR 177.2600
G-7371 34 Extrusion & Calendering Low compression set
G-7400BP 46 Injection & Compression Base polymer
G-7451 40 Injection & Compression Low compression set
G-7452 42 Injection & Compression Lower crosslink density for complex shapes
G-7800BP 86 Compression Base polymer
G-7801 66 Compression Very fast cure

Bisphenol Curable Terpolymers

Daikin bisphenol curable terpolymers are terpolymers of hexafluoropropylene, vinylidene fluoride and tetrafluoroethylene. Their fluorine content ranges between 66% and 71%. Like the bisphenol curable copolymers, they are available as both base polymer and precompound. These polymers are ideal for applications that require resistance to fuel mixtures and solvents, such as fuel hoses and seals used in chemical processing. Compared with copolymers, cure times tend to be a little longer and compression sets a little higher, and with the exception of DAI-EL G-671 and G-EXP-025, low temperature flexibility is not as good due to higher fluorine content. Injection and compression molding grades, extrusion grades and lower temperature grades are available.

G-EXP Series
G-EXP Series Mooney Viscosity Fluorine Content Defining Characteristics
G-EXP-025 27 66% Suitable for injection molding; TR-10 of -20°C
G-EXP-045 40 70% Very fast cure
G-EXP-056 40 70% Improved ultimate elongation
500 Series
500 Series Mooney Viscosity Fluorine Content Defining Characteristics
G-501N 64 69% Base polymer
G-501NK 74 68% Diamine curable base polymer
G-551 48 69% Suitable for compression and transfer molding
G-558 34 69% Suitable for calendering and extrusion
600 Series
600 Series Mooney Viscosity Fluorine Content Defining Characteristics
G-603 31 71% Suitable for compression and transfer molding
G-607BP 43 66% Base polymer
G-621 50 71% Suitable for compression and transfer molding
G-663BP 27 66% Base polymer suitable for injection molding
G-671 35 66% Suitable for compression and transfer molding with good low temperature properties
G-684BP 44 70% Base polymer

Peroxide Curable Copolymers

Daikin peroxide curable copolymers have 66% fluorine content. These products have better acid resistance and overall mechanical properties than bisphenol cured copolymers. However, there is some reduction in heat and compression set resistance for peroxide curable copolymers. Injection and compression molding grades and improved mold flow grades are available. Post curing can be omitted for these polymers.

800 Series
800 Series Mooney Viscosity Molding Method Defining Characteristics
G-801 37 Transfer & Compression General purpose grade with good water and acid resistance
G-802 20 Injection Higher ultimate elongation than G-801
8000 Series
800 Series Mooney Viscosity Molding Method Defining Characteristics
G-8002 25 Injection Best mold flow

Peroxide Curable Terpolymers

Daikin peroxide curable terpolymers have between 69% and 71% fluorine content. They have better acid resistance, solvent resistance, and overall mechanical properties than bisphenol cured copolymers. As with peroxide cured copolymers, some reduction in heat and compression set resistance is normal compared with bisphenol cured grades. Compression and injection molding, low compression set and lower temperature grades are available. Post curing can be omitted for these polymers.

900 Series
900 Series Mooney Viscosity Fluorine Content Defining Characteristics
G-901 48 71% Suitable for compression and transfer molding
G-902 19 71% Suitable for injection molding
G-912 56 71% Low compression set
G-952 40 69% Suitable for compression and transfer molding. Good balance of fluid resistance and low temperature flexibility
G-962 24 67% Suitable for injection molding with good low temperature properties
G-964 46 67% Suitable for compression and transfer molding with good low temperature properties
9000 Series
9000 Series Mooney Viscosity Fluorine Content Defining Characteristics
G-9062 23 71% Suitable for injection molding with excellent mold flow
G-9074 42 71% Suitable for injection molding with higher ultimate elongation than G-9062

Low Temperature Peroxide Curable

Daikin’s low temperature peroxide curable polymers have improved low temperature performance, mechanical properties, flex resistance, acid resistance and flex cracking resistance compared with bisphenol cured copolymers. As with other peroxide cured polymers, some reduction in heat and compression set resistance is seen compared with bisphenol cured polymers. Injection and compression molding, fluid resistant grades are available. Post curing can be eliminated for these polymers.

LT Series
LT Series Mooney Viscosity Fluorine Content Defining Characteristics
LT-252 35 66% Flexible to -25°C with better fuel resistance compared to other LT grades
LT-302 44 64% Flexible to -30°C and suitable for compression and transfer molding
LT-303L 14 65% Flexible to -30°C and suitable for injection molding or blending with higher viscosity grades
LT-304 26 65% Flexible to -30°C with improved heat and compression set resistance

Base Resistant Elastomers

For some oil and gas and automotive applications the base resistance of fluoroelastomer (FKM) products is not sufficient. FEPM rubber has excellent base and amine resistance but has poor low temperature flexibility, poor fuel resistance, and slow cure speed compared to FKM. DAIKIN has developed new 62% fluorine content polymers which combine the processing advantages of FKM with amine resistance comparable to FEPM. These grades are peroxide curable and post curing can be eliminated if desired. For more information, please contact the DAI-EL technical service team today.

GBR Series
GBR Series Mooney Viscosity Molding Method Defining Characteristics
GBR-6002 25 Injection Base resistant grade with -12°C TR-10
GBR-6005 60 Transfer & Compression Base resistant grade with -12°C TR-10

Perfluoroelastomers

Operating environments in the aerospace, oil & gas, chemical processing, transportation and semiconductor manufacturing industries are becoming increasingly harsh. At the same time, global competitive pressures require minimizing maintenance downtime and warranty costs. There is simply no room for failure of critical sealing components. That’s why design, process and maintenance engineers specify DAI-EL perfluoroelastomer for the toughest sealing applications. They know that seals made of DAI-EL perfluoroelastomer are more resistant to aggressive chemicals and high temperatures than any other elastomer on the market today. That means longer intervals between seal changes, reduced risk of leakage, a safer operating environment and higher productivity. DAI-EL is proud to introduce three perfluoroelastomer base polymers in addition to many compounds that satisfy OEM specifications. For more information, please contact the DAI-EL technical service team.

Property GA-15 GA-105 GA-500
Low Temperature X
Ultra Clean X X
200°C Service X X
300°C Service X
FFKM
FFKM Mooney Viscosity Max Service Temp Continuous/Peak Defining Characteristics
GA-15 25* 200°C
220°C
Peroxide cured base polymer with glass transition temperature of -20°C
GA-105 60* 200°C
220°C
Super clean peroxide cured base polymer with minimal metal ion contamination
GA-500 80** 300°C
320°C
Super clean imidazole or triazine cured base polymer with minimal metal ion contamination & best chemical resistance

* Mooney viscosity at 100°C (ML 1+10 @ 100°C)
** Mooney viscosity at 170°C (ML 1+20 @ 170°C)


Specialty Elastomers

Daikin offers a pair of specialty fluoroelastomer products for unique applications where FKM or FFKM won’t suffice.

DAI-EL G-101 is a liquid fluoroelastomer and an excellent processing aid and hardness modifier. Adding a few parts per hundred rubber to a bisphenol cured copolymer compound results in smoother extrusions and moderate reduction in hardness, modulus, and tensile strength while improving elongation significantly.

DAI-EL T-530 is the first thermoplastic fluoroelastomer. Although it performs as an elastomer below its melting point, above its melting point it flows like a thermoplastic material.

Specialty Elastomers
Grade Defining Characteristics
G-101 Fluorinated rubber-type plasticizer. Liquid above 70°C. 500 Poise @ 60°C
T-530 Thermoplastic elastomer, melt processable. No compounding or cross-linking required. MFR 22 @ 250°C. USP Class VI Certification

Cri-Tech Custom Compounding

Founded in 1977, Cri-Tech is the leader in full service formulation development and custom compounding of high performance elastomers, thermoplastics and specialty products. Cri-Tech operates a 55,000 square foot state of the art mixing facility with separate carbon black and ultra-low contamination “clean” mixing lines. Quality leads the way at Cri-Tech with systems that ensure 100% traceability of the raw materials used in each batch and computerized scale and mixer control. Process and QC data are collected in a single, searchable database for trend analysis and root cause identification. The plant has internal mixers with over 8 million pounds of capacity and has broadened its product offering and material expertise into high performance thermoplastics with the addition of an Inconel twin-screw compounding line sized for both development and specialty production supply.

While Cri-Tech’s internal focus is on quality, their external focus is on you. They tailor their services to match both your material performance and delivery requirements.