Liquid Phenolic Resin forFriction Mixes
SG-3100C: Improving Workplace Conditions Through Dust-Free
Compounding

The SG-3100C is a new dust-free solution for compounding friction mixes that are used in the manufactureof disc brake pads and drum linings. This one, universal liquid resin may be used for either partial or full
replacement of powdered resins. Airborne dust in the workplace is detrimental in many ways. Therefore, it isrecommended to avoid or reduce dust originating from the mixing process to the absolute minimum. A buildup of dust on surfaces also poses a dust explosion hazard in the presence of a static electricity discharge.

Reducing Dust Using Liquid PhenolicResin
ASK Chemicals' liquid phenolic resin, SG-3100C,
reduces dust in the workplace without interfering with
the quality of the friction material. SG-3100C is also
indicated for nonasbestos formulations,preventing dust generated by the fiber mix that isused as an asbestos replacement.

MixingIn both cases, use a standard cylindrical plow andchopper mixer, such as a Henschel, Lödige, Eiricho Littleford Ploughshare mixer. The liquid resin isadded either under pressure through an injector
near the chopper, or alternatively without pressure
through a tube at the top of the mixer.

Pressing and Oven Curing
SG-3100C Liquid Resin Characteristics
Viscosity 20°C (cP)

Solids (%)

H2O Tol. (%)

Cure 160°C (sec)

60-95

53-59

200-550

90-120

Formulatory Guidelines
For partial replacement, substitute 30% of thepowder resin (by solids content) in the friction
formulation.
For full replacement, substitute 100% of the powder
resin (by solids content) in the friction formulation.

In the case of partial replacement, use the normal
method of hot pressing, which may or may notinclude the use of cold pressed preforms. Pressing
is followed by the standard oven curing cycle.
In the case of full replacement, cold pressing isadvised using high pressure. The oven curingschedule also needs to be revised to include an
additional holding step at 80-90°C for 1 hour tofacilitate degassing and prevent cracking or blisters
during heating.

Sample Formulations

Recommendations

The following sample formulations are indicative
only, and have not been adapted for commercial
production:

It is permissible for some material from a previous
batch to contaminate a subsequent batch if thebatches are of the same type of compound.
Otherwise, absolute cleanliness is recommended.
The encrustation of material onto the mixer wall
must be avoided. Periodic cleaning is needed.

Low-metallic Disc Brake Pad for Light Vehicle
Phenolic Resin Powder and Liquid

Kg

Steel Wool12

Wollastonite

21

Mineral fibers

12

Calcium carbonate

30

Graphite coarse synthetic

4

Friction dust

5

Barium sulphate

10

Phenolic resin powder

4.2

Phenolic resin liquid

3.2

Low-metallic Disc Brake Pad for Light Vehicle
Phenolic Resin Powder and Liquid

KgSteel Wool12

Wollastonite

21

Mineral fibers

12

Calcium carbonate

30

Graphite coarse synthetic

4

Friction dust

5

Barium sulphate

10

Phenolic resin liquid

10.7

In cold pressing, if a problem is experienced withthe structural integrity of moulded discs, a moulding
aid such as cellulose fibers can be incorporated into
the formulation.

What this means for you
ASK Chemicals' SG-3100C liquid phenolic resin for friction mixes eliminates dust in the production area,
providing a safer and healthier working environment. Contact your local sales representative to learn more.