Powder Phenolic Resins in theFriction Industry
The Benefits of SG-3378 in Friction

Powder phenolic resins are commonly utilized as the primary binder in most friction linings, pads, or elements.
By taking advantage of the phenolic resin technology, the formulator can manipulate the final properties of afriction element.
Epoxy-modified phenolic powder resin brings some unique features to friction elements, contributed to theintrinsic characteristics of epoxy resin. The following list are some benefits:• Improved toughness• Superior adhesion to glass/steel fiber• Shorter stopping distance• Improved static moment• Higher compressibility• Higher friction coefficientSG-3378 Properties

The epoxy-modified powder phenolic resin,
SG-3378, can assist with formulating brake pads
with a short stopping distance. SG-3378 is ideal foruse in disc pads for light vehicles, SUVs, 4x4s, andracing cars. It can also be used in the formulation ofrailway shoes for heavy axle load.

This resin must be stored away from heat sources
and moisture.

SG-3378 Characteristics
SG-3378 portrays a combination of characteristics
provided by phenolic resin and epoxy resin, including
improved flexural strength/toughness and a “softer”
binder matrix while retaining high heat resistance.

SG-3378 powder has a medium flow, medium
hexamine level, fine particle size and medium
cure rate.
GradeFlow

Hexamine

Cure Time 160°C

SG-3378

27-32 mm

8.8-9.2 %20-40 Sec

SG-3378 Degradation Temperature
Data
Starting degradation temperature

200°C

10% Weight loss temperature

454°C

30% Weight loss temperature

550°C

Formulatory Guidelines
SG-3378 is ideal for use in, but not limited toSG-3378 can also be used in conjunction with• Disc brake pads for light vehicles• Disc brake pads for high speed cars
• Heavy-freight rail brake blocks• Tractor brake linings• SG-3130 unmodified powder in disc brake pads,

Starting Formulations

Tractor Brake Lining

heavy-freight rail blocks, or tractor linings• Phosphorous-modified phenolic powder resin indisc brake pads for racing cars

The following starting formulations are shown
expressly for the purpose of demonstrating the broad
formulatory approaches that apply, and are notadapted for commercial production.
Semi-Metallic Disc Brake Pad for 4x4
Parts by WeightParts by Weight
Glass fiber

3.5

Steel fiber

9

Calcium carbonate

13Barytes

10

Brass powder

3Kevlar

0.3

Zinc oxide

1Graphite

10

Antimony trisulphide

3Coke

8

Calcined alumina

4

Antimony trisulphide

8

Friction dust

4

Magnesium oxide

0.8

Wollastonite

10

Friction dust

5Graphite

6

Nitrile rubber powder

3

Recycled rubber

3

Barytes

13

Nitrile rubber powder

4

Calcium carbonate

5.9

SG-3378

16.5

Mica

6

Carbon black2

Copper powder

2

Kevlar

5SG-3378

10

Mineral wool

10

Steel fiber

28

Metallic Disc Brake Pad for SUV
Parts by WeightSteel fibers

30

Iron powder

20

Graphite

15

Barytes

21.5

Friction dust

5SG-3378

8.5

What this means for you
ASK Chemicals' SG-3378 offers unique benefits as the binder in disc brake pads, rigid brake linings,
and heavy-freight rail blocks. If friction elements with ashorter stopping distance and greater transverse
strength are required, it can be achieved with SG-3378. Please contact your ASK Chemicals sales
representative for additional information regarding SG-3378.