Tecnoflon - Solvay · Tecnoflon® PFR compounds can be transformed into virtually any kind of...

High Performance Premixed Compounds

Tecnoflon® PFR FFKM Compounds

Tecnoflon®

Ready to Mold FFKM CompoundsFully-formulated, mixed and ready-to-mold compounds from the Tecnoflon® PFR series are available from Solvay Specialty Polymers. Premixed, conveniently sized packages are perfect for molders with any of these requirements:

• Limited small batch mixing capabilities

• Start-up or small-run production parts

• An interest in making higher end FFKM compounds without incurring a large inventory investment

• A need for absolute batch consistency and reliability

• Global specifications and customers

The expert rubber compounders at Solvay Specialty Polymers have designed a range of compounds to meet a wide variety of applications. There are three series of compounds, each based on a different PFR polymer grade:

A series• Based on Tecnoflon® PFR 94

• Excellent overall chemical resistance

X series• Based on Tecnoflon® PFR 95HT

• The material of choice when very high service temperature is needed

• Good overall chemical resistance

• Excellent water/steam resistance, up to 300 °C

L series• Based on Tecnoflon® PFR LT

• The material of choice when very low service temperature is combined with best-in-class chemical resistance

All Tecnoflon® PFR compounds are based on a peroxide curing system for ease of processing.

ApplicationsTecnoflon® PFR compounds can be transformed into virtually any kind of elastomeric sealing element such as O-rings, gaskets, valve bodies, butterfly valves, pump housings and stators, metal bonded parts, diaphragms, profiles, etc.

They can be used in mechanical seals, pumps, compressors, valves, reactors, mixers, sprayers, dispensers, quick-connect couplings, controls, instrumentation, etc. in the chemical and petrochemical industries, hydrocarbon processing, petroleum exploration and extraction, food processing, pharmaceutical and bio-analytical industries, aerospace and semiconductor manufacturing industries.

Selection CriteriaA few criteria can be used for the selection of the proper compound for the diverse possible applications:

• Operating temperature range

• Chemical resistance

• Color

• Hardness

• Physical properties

• Additional requests (FDA compliance, etc.)

For a quick overview please refer to the table on page 3.

Chemical Pharmaceutical Oil & Gas

2 \ High Performance Premixed Compounds – Product Portfolio

Compound Code Color Hardness [ShoreA] Tmin [ ̊C] Tmax [˚C] Notes Main Feature

PFR 70-BA1 Black 70 –10 230

Universal Chemical Resistance

PFR 70-WA1 White 70 –10 230 FDA/USP Class VI

PFR 70-BA4 Black 70 –10 230 FDA

PFR 75-BX2 Black 75 –10 300

High TemperaturePFR 70-WX1 White 70 –10 300 FDA/USP Class VI

PFR 75-BL1 Black 75 –40 230 Low Temperature

Compound Coding

PFR 70-BA1

Color B = Black W = White

Polymer BaseA = PFR 94X = PFR 95HTL = PFR LT

Target Hardness

Sequence NumberExample:

High Performance Premixed Compounds – Product Portfolio / 3

A SeriesA series PFR compounds show universal chemical resistance similar to PTFE, but with elastomeric properties. They offer the widest range of aggressive media sealing capabilities along with excellent compression set values.

They are suitable for most applications in temperature ranging from – 10 °C to 230 °C, offering outstanding resistance to aggressive media such as acids, caustics, ketones, aldehydes, esters, ethers, methanol, solvents, sour gases, amines, hydrocarbons, steam, hot water, ethylene and propylene oxide and mixed process streams. Moreover A series PFR compounds were specifically developed to cope with a wide range of potent active pharmaceutical ingredients (API‘s) and aggressive cleaning agents, being especially suited to withstand steam-in-place (SIP) and clean-in-place (CIP) procedures.

Two black and a white compound, 70 and 80 ShoreA, are available, as shown in the chart on page 7. FDA and USP Class VI PFR 70-WA1 and PFR 70-BA4 are intended for repeated use in food processing equipment and to be in contact with food types I through VII Table 1 – Types of Raw and Processed Food. The base perfluoroelastomer is registered in the FDA Inventory of Effective Food Contact Substances (FCS) Notifications, being the subject of Food Contact Notification (FCN # 128).

PFR 70-WA1 post cured either 8 h at 200 °C or (8+16) h at 230 °C is in compliance with the requirements of USP Plastic Class VI as it passed the United State Pharmacopoeia (USP) Biological Reactivity test, IN VIVO. Any intermediate combination of both post-curing time and temperature is compliant too.

Compound Code Unit PFR 70-BA1 PFR 70-WA1 PFR 70-BA4

Tmin ˚C – 10 – 10 – 10

Tmax ˚C 230 230 230

Color Black White Black

Hardness ShoreA 70 70 70

Notes FDA/USP Class VI FDA

Compound Mooney ViscosityML (1+10’ at 121 ̊C) MU 35 45 39

Compound Density g/cm3 1.99 2.40 2.23

MDR arc 0.5 ,̊ 12’, 160 ̊C

ML lbf·in 0.6 1.0 0.5

MH lbf·in 26.8 33.3 23.0

ts2 s 35 26 60

t’50 s 53 46 95

t’90 s 112 94 232

MDR arc 0.5 ,̊ 12’, 150 ̊C

ML lbf·in 0.7 1.1 0.7

MH lbf·in 26.8 34.0 20.7

ts2 s 70 41 140

t’50 s 121 78 235

t’90 s 285 200 485

Mechanical Properties after Post-cure: 4 h at 230 ̊C 4 h at 230 ̊C 4 h at 230 ̊C

Modulus 100 % MPa 8.5 7.4 6.0

Tensile Strength MPa 19.4 13.8 16.0

Elongation at Break % 156 175 180

Hardness ShoreA 71 73 70

Compression Set O-ring #21470 h at 200 ̊C %

20 22 35


X SeriesX series PFR compounds provide a significantly wider operational range and superior compression set resistance than any other perfluoroelastomer. With an upper temperature limit of 300 ºC, X series compounds should be selected for the most demanding service conditions.

Thanks to their unique curing chemistry, they can offer very broad chemical resistance in a wide variety of media, including acids, caustics, ketones, aldehydes, esters, ethers, methanol, solvents, sour gases, amines, hydrocarbons, steam, hot water and mixed process streams.

A black and a white compound are available, as shown in the chart on page 9. For best acid resistance select PFR 70-WX1.

FDA and USP Class VIPFR 70-WX1 is intended for repeated use in food processing equipment and to be in contact with food types I through VII Table 1 – Types of Raw and Processed Food. The base perfluoroelastomer is registered in the FDA Inventory of Effective Food Contact Substances (FCS) Notifications, being the subject of Food Contact Notification (FCN # 126).

PFR 70-WX1 post-cured either 8 h at 200 °C or (8+16) h at 290 °C is in compliance with the requirements of USP Plastic Class VI as it passed the United States Pharmacopoeia (USP) Biological Reactivity test, IN VIVO. Any intermediate combination of both post-curing time and temperature is compliant too.

Compound Code Unit PFR 75-BX2 PFR 70-WX1

Tmin ˚C – 10 – 10

Tmax ˚C 300 300

Color Black White

Hardness ShoreA 75 70

Notes Steam at 300 °C FDA/USP Class VI

Compound Mooney ViscosityML (1+10’ at 121 ̊C) MU 110 93

Compound Density g/cm3 2.00 2.44

MDR arc 0.5 ,̊ 12’, 170 ̊C

ML lbf·in 2.6 2.7

MH lbf·in 23.9 18.2

ts2 s 49 42

t’50 s 105 83

t’90 s 307 214

Mechanical Properties after Post-cure: (8 + 16 h) at 290 ̊C (8 + 16 h) at 250 ̊C

Modulus 100 % MPa 11.3 5.6

Tensile Strength MPa 18.5 15.6

Elongation at Break % 175 280

Hardness ShoreA 76 70


20 20


46 65


L SeriesL series PFR compound shows a very low glass transition temperature (Tg) of –30 °C, a unique offer for a FFKM compound.

Its chemical resistance, superior to A-series compounds, makes the L compounds an outstanding combination of high-end properties.

PFR 75-BL1 is suitable for most applications in temperature ranging from – 40 °C to 230 °C, offering outstanding resistance to aggressive media such as hot organic and inorganic acids, caustics, amines (especially hot amines, i.e. at temperature higher than + 70 °C), ketones, aldehydes, esters, ethers, alcohols, fuels, solvents, sour gases, hydrocarbons, steam, hot water, formate solutions and mixed process streams.

Compound Code Unit PFR 75-BL1

Tmin ˚C – 40

Tmax ˚C 230

Color Black

Hardness ShoreA 75

Compound Mooney ViscosityML (1+10’ at 121 ̊C) MU

Compound Density g/cm3 2.00

MDR arc 0.5 ,̊ 12’, 160 ̊C

ML lbf·in 1.7

MH lbf·in 28.0

ts2 s 34

t’50 s 70

t’90 s 281

Mechanical Properties after Post-cure:(1 + 4) h at 230 ̊C

Modulus 100 % MPa 5.9

Tensile Strength MPa 17.8

Elongation at Break % 219

Hardness ShoreA 78


27


Chemical Resistance OverviewCompound Code PFR 70-BA1 PFR 70-WA1 PFR 70-BA4 PFR 75-BX2 PFR 70-WX1 PFR 75-BL1

Raw Polymer PFR 94 PFR 94 PFR 94 PFR 95HT PFR 95HT PFR LT

Inorganic Acids A A A B A A

Organic Acids A A A B B A

Alkalis A A A B B A

Amines (RT) A A A A A A

Hot Amines (> 70 ̊C) B B B C C A

Steam A A A A A A

Ketones A A A A A A

Esters A A A A A A

Ethers A A A A A A

Aldehydes A A A A A A

Alcohols A A A A A A

Hydrocarbons A A A A A A

Sour Gas A A A A A A

Lubricants A A A A A A

Symbol Volume Swell (%)

A < 10 % B 10 – 30 % C 30 – 50 %


Low T Flexibility Thermal ExpansionFollowing the definition of linear coefficient of thermal expansion: L = L0 · (1 + α · ∆T), the average value between 80 and 250 °C is as follows:

α = 3.5 · 10-4 1/K

Dielectric constant and loss factor at 50 Hz frequency. Volume and surface resistivity were measured applying 100 V direct tension.

Polymer Unit L Series A Series X Series

DSC

Tg Onset °C –38 – 8 – 7

Tg Midpoint °C – 32 – 1 – 1

Retraction Curve (ASTM D1329)

TR10 °C – 30 – 2 – 1

TR30 °C –25 2 3

TR50 °C – 21 4 6

TR70 °C – 16 7 9

Specific Heat

T ( ˚C)

Specific Heat (J/g)

Black Compounds White Compounds

50 0.98 0.83

100 1.05 0.86

150 1.12 0.91

Dielectric Constant ε´ 3.50

Loss Factor tan(δ) 0.030

Surface Resistivity RS (Ω) 5.0·1016

Volume Resistivity RV (Ω·cm) 6.1·1016

GasPermeability (T = 30 ̊C)

(cm3(STP) · mm/m2 · atm · d)

Nitrogen 250

Oxygen 450

Helium 5400

Electrical Properties

Gas Permeation Rate

Miscellaneous PFR PropertiesIn general, the following properties can be considered as typical or average values measured on a few typical PFR compounds.


Processing GuideCompound Storage and Shelf LifeTecnoflon® PFR compounds can be stored up to 6 months in a cool and dry area. Refrigeration is recommended to extend shelf life.

PFR compounds can be readily processed by means of conventional elastomer processing methods such as compression, transfer and injection-molding. Alternatively they can be extruded into hoses or profiles and subsequently cured in an autoclave. Tecnoflon® PFR compounds behave similarly to Tecnoflon® peroxide-cured fluoroelastomer compounds: standard process equipment for FKMs is suitable for PFR compounds.

Pre-forming (by extrusion)When processing Tecnoflon® PFR compounds by means of compression molding into O-rings, pre-forming (i.e. the shaping of the uncured compound in the form of a cord) is recommended. This optimizes the manufacturing process as well as enhances the seal performance. Additionally accurate compound preforming reduces the amount of flash, resulting in less process waste and improved efficiency.

It is recommended that the preforming be carried out by means of conventional elastomer screw extruders with L/D ratio of approximately 15. Extrusion parameters must be fine-tuned according to compound properties and apparatus design; for lower viscosity compounds such as the A and L series, 50°C for the die and 30°C for the barrel are recommended. On the other hand, for higher viscosity compounds like the X series, higher temperatures (70°C for the die and 50°C for the barrel) are suggested. The operating conditions, when set properly, will result in a smooth and constant profile. Particular care must be taken to prevent excessive heat buildup in the compound, which will result in scorching.

MoldingVulcanization of the compounds is most commonly carried out in compression-molding presses. The process conditions depend on the compound, the press and the tool design as well as on the item geometry. However the A and L series compounds can be effectively molded at 160°C, while 170 °C is the optimal curing temperature for the X series compounds. Curing time depends mainly on item size and geometry: for instance the larger the cross-section, the longer the curing time.

Post CureThe post-cure step is needed for all FFKMs in order to complete the cure, eliminate impurities and strengthen filler-polymer interactions.

Post-cure parameters are related to oven type. Therefore optimal conditions must be tuned to the system in use. As starting point, the following is recommended:

• A and L series: 4 h at 230°C

• BX series: 8 hours rise from RT to 290°C followed by 16 hours at 290°C

• WX series: 8 hours rise from RT to 250°C followed by 16 hours at 250°C


Frequently Asked QuestionsAre PFR gums still available?

Yes, PFR gums are still available. PFR compounds are designed for users who choose not to mix the compounds by themselves.

In what form is the material provided?

The compound is in the form of rubber slabs.

How is the compound packaged?

The compound is packaged in vacuum-sealed envelopes for a total of 1.0 kg and sealed in a cardboard box.

Is pre-forming available?

Not at this time.

What is the lead time for standard compounds?

In most cases the lead time is two weeks upon the acceptance of a purchase order.

Is stocking available?

Higher volume compounds may be stocked on a case-by-case basis.

Can special compounds be mixed to meet specific customer formulations?

Yes, this is possible on a case-by-case basis.


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Safety Data Sheets (SDS) are available by emailing us or contacting your sales representative. Always consult the appropriate SDS before using any of our products.

Neither Solvay Specialty Polymers nor any of its affiliates makes any warranty, express or implied, including merchantability or fitness for use, or accepts any liability in connection with this product, related information or its use. Some applications of which Solvay’s products may be proposed to be used are regulated or restricted by applicable laws and regulations or by national or international standards and in some cases by Solvay’s recommendation, including applications of food/feed, water treatment, medical, pharmaceuticals, and personal care. Only products designated as part of the Solviva® family of biomaterials may be considered as candidates for use in implantable medical devices. The user alone must finally determine suitability of any information or products for any contemplated use in compliance with applicable law, the manner of use and whether any patents are infringed. The information and the products are for use by technically skilled persons at their own discretion and risk and does not relate to the use of this product in combination with any other substance or any other process. This is not a license under any patent or other proprietary right.

All trademarks and registered trademarks are property of the companies that comprise the Solvay Group or their respective owners.© 2017, Solvay Specialty Polymers. All rights reserved. D 10/2016 | R 11/2017 | Version 1.2 Brochure design by ahlersheinel.com

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