Phenol Formaldehyde Resin Powder with Low Free Phenol for Friction Materials
Phenol Formaldehyde Resin F6712 is produced by condensing a molar excess of phenol to formaldehyde in the presence of an acid catalyst. This produces a thermoplastic resin. To cure this resin, a hardening agent is used, HMTA (or hexa). Under heat and pressure, it yields ammonia and formaldehyde as methylene groups to cure the resin, hence the term “two-step,” because of the two formaldehyde additions. A novolak phenolic resin has an infinite shelf life under normal storage conditions.Cured phenolic resin provides the rigidity necessary to maintain structural integrity and dimensional stability even under severe conditions.
1. Bonding Strength
The primary use of phenolic resin is as a bonding agent. Phenolic resin effortlessly penetrates and adheres to
the structure of many organic and inorganic fillers and reinforcements, which makes it an ideal candidate for
various end uses.
2. High Temperature Performance
A key characteristic of thermoset phenolic resin is its ability to withstand high temperature under mechanical
load with minimal deformation or creep. In other words, cured phenolic resin provides the rigidity necessary to
maintain structural integrity and dimensional stability even under severe conditions.
3. Chemical Resistance
Phenolic resins accommodate the harsh exposure of severe chemical environments. The inherent nature of
phenolic resin provides an impervious shield to protect a variety of substrates from the corrosive effects of
chemicals. Laboratory tests confirm minimal degradation from many chemicals after prolonged exposure,
often at elevated temperatures.
4. Low Smoke and Toxicity
Burning phenolic resin typically generates hydrogen, hydrocarbons, water vapor, and carbon dioxide. Phenolic resin produces a relatively low amount of smoke at a relatively low level of toxicity.
5 . High Carbon and Char Yield
Phenolic resins demonstrate higher char yields than other plastic materials when exposed to temperatures
above their point of decomposition. In an inert atmosphere at high temperatures (600° - 2,000°F, 300 -
1,000°C), phenolic resin will convert to a structural carbon known as vitreous carbon. In many ways, this
material behaves similar to ceramic and may actually contribute to structural integrity when exposed to fire
Phenol Formaldehyde Resin F6712 is recommended for Friction Materials.
Curing time @150°C
the package is paper-plastics bag in 25KGS each one
The storage life of this product is several months in a cool and dry place in original closed bags