phenolic resin

We have three type of phenolic resin in all.Following is the describle and specification. First one is common phenolic resin,it isnovolak structure,mainly used in moulding compound ,insulating plate and binder with common specific. Second oneis modified phenolic resin by cashew shell oil.There are obvious improve in the toughness of modified resin.It is friction performance rather good,the carbide make upof the surface in the course of friction have the feature of softness,soughness and not easy to drop.It can make thecomponent and heat state of the friction material appearance equaly.At the same time,it is pliabilityis good in high temperature.Normally used in high temperaure resistance material and friction material. Third one is narrow distribution of small molecules phenolic resin.The moldcular weightis about 1000-4000,it is a high-performance resin.Generally speaking,the higher of molecular weight,the higher of softening point,melt viscosity,machenical strength and it is relative function.But it is processing(flowing,soaking of filler,permeanbility and solubility)bad.So appropriate distribute the narrow small molecular is a key to keep the stable of phenolic resin is feature.This type of resin used in high comsumption insluating parts ,such as electrical,meter. The main charcteristic of the 3type phenolic resin as follow: 1. common type appearance: flake, color: opaque,slight cream softeningpoint:89-95°c gathering speed:35-45 s water:≤2.5% free phenol:≤5.6% 2. modified phenolic resin by cashew shell oil appearance: color:rosin or dark brown softeningpoint:88-92°c gathering speed:39-42 s water:≤2.5% free phenol:≤5.6% 3.high-performance resin appearance: color:transpanent or translucent softeningpoint:82-95°c gathering speed:about 40s water:≤1.6% free phenol:≤5% We can adjust the above resin is gathering speed to 30s according different requirements.The softening point can be to 82°c.The lower of softening point,the longer of flow and curing time.