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The MILEX™ Family of products are based on a high performing, flexible
phenolic technology that enables effective and efficient achievement
of proper caliper to ensure predictable, stable and durable performance
over the lifespan of a brake pad or disc. Each different phenolic
resin system was designed to achieve critical performance indices
and is available at different viscosities.
The RN series are novolak type phenolic resins modified by special elastomers.
This series consists of a grouping of acrylic rubber modified resin in addition
to the RS-2210MB grade, a silicon rubber modified resin. This series is recognized
worldwide for its thermal shock and chemical resistant properties. In addition,
this particular series possesses anti-brake noise and vibratory qualities.
The XL series is composed of phenol aralkyl resins, of which there are three different
grade levels. The XL line is known for its stable friction and abrasion, excellent
heat and chemical resistance and anti-noise and vibratory qualities.
The RX series features one-grade level. The RX line is the company's most flexible
friction technology developed to date. RX possesses the same characteristics and
properties as XL, which are stable friction and abrasion, heat and chemical resistance
and anti-noise and vibratory qualities.
Each formulation of the binder resin possesses a core set of characteristics,
which include:
• flexibility
• strong heat resistance
• low water absorption
• shock and crack resistance
These characteristics yield significant benefits and results in a higher performing
braking system. The binder resin's flexibility reduces vibratory lurch during
braking, while its strong heat resistance yields good friction and lower wear
and tear. In addition, the friction material's thermal shock resistance facilitates
the production of crack free brake pads and ensures that they remain crack free
for a longer period over the life of the brake pads.
The properties of MILEX resins yield superior brake pads that
reduce noise, vibration and harshness (NVH). All phenolic resin
formulations are developed in accordance with Mitsui Chemicals'
unique product methodology that enables effective and efficient
achievement of proper caliper and composite formulation. The
advantage of incorporating the MILEX material into a brake design
is that the phenolic resin aids in the provision of a non-abrasive
vibratory sensation free surface finish, which is very important
in the performance of the brake system. Additionally, its superior
performance at elevated temperatures and excellent moldability:
• aids in brake
noise reduction
• yields good friction
• significantly lowers
vibratory lurch
• reduces system wear
and tear
The benefits of this friction material to OEMs is shorter molding time and
costs due to faster curing, significant NVH reduction and crack-free
brake pads and discs. The phenolic resin is also compatible with
all brake pads especially NAO.
The following charts provide insight into the general, practical
and molding properties of the MILEX family of modified phenolics.
General Properties
Table 1: RN Series
Table 2: XL Series
Table 3: RX Series
Practical Properties
Table 4: Practical properties of MILEX™ Phenolic Resin
Friction Material Heat Resistance
For a graphical depiction of the heat resistant properties of MILEX Phenolic Resin
at 350°C in addition to information on the composition of the moldings, press
condition and post curing condition.
Table 5: Ratio of Weight Decrease
For a graphical depiction of MILEX Phenolic Resin over 350°C in addition
to the information on the curing and testing conditions.
Table 6: Resin
Friction Material Molding Properties
For information on the molding frequency and amplitude angle of
all formulations of MILEX Phenolic Resin.
Table 7: Curelastometer
Storage Modulus of Resin
For information on the storage molding and test conditions, please view the chart
below.
Table 8: Resins
Contact the product manager to learn more about
our line of MILEX Phenolic Resin used in brake systems.
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