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Bakelite Phenolic resins Powder are synthetic polymers formed as condensation products of phenols and aldehydes under acid conditions. The reaction forms novolac resins. These resins require a curing agent - often hexamethylenetetramine or hexa.It is milled into powder and re-mixed with Hexa.
Application
Bakelite Phenolic resins Powder are suited to both cold and hot compression molding for the production of a range of abrasive wheels, including those utilizing glass fabric prepregs for reinforcement.
Bakelite Phenolic resin has high heat-resistance and provides strong adhesion to grain. When compared to the other heat-resistant resins, like polyimide, phenolic resin is less expensive in cost and easier to mold
than other resins.
Specification:
| Properties | Value | Test standard |
| Curing time @150°C | 90-110s | GB/T24411-2009 |
| Flow Distance@125°C | 35-45mm | GB/T24411-2009 |
| Free-phenol | 0.5-1.5% | GB/T30773-2014 |
| hexa content | 8-10% | ZJHM-QESP-01-2015 |
| Water content | 0.5-2.0% | GB/T2683-2008 |
| Screening 200mesh/0.074mm | 99% | GB/T24411-2009 |
Packing&Storage
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