Usually refers to the liquid or solid product obtained by the action of phenol or its homologues (such as cresol, xylenol) and formaldehyde. Depending on the type of raw material used, the ratio of phenol to aldehyde, and the type of catalyst, two different types of thermoplastic and thermosetting resins can be produced. Thermoplastic phenolic resin (novolak resin) only melts when heated and cannot become insoluble or infusible. But after adding curing agent (such as hexamethylenetetramine), it can be converted into thermosetting, using trifunctional or difunctional phenols as raw materials, the amount of phenol (mol) exceeds the amount of aldehyde (mol) and acid catalyst Generated below. Thermosetting phenolic resin (thermosetting phenolic resin) becomes insoluble and infusible after being heated. Phenolic resin is acid, alkali and heat resistant.
Segment storage method
Precautions for storage  Store in a cool, ventilated warehouse. The storage temperature should not exceed 37 ℃. Keep away from fire and heat. Keep container tightly closed. should be kept away from oxidizer, do not store together. Equipped with the appropriate variety and quantity of fire equipment. The storage area should be equipped with leakage emergency treatment equipment and suitable containment materials.
——  The product is a thermoplastic phenolic resin formed by polycondensation of phenol and formaldehyde in an acidic medium. It can be dissolved in ethanol and added 6-15% of urotropine to become thermosetting.
Formed at 150 ℃, has a certain mechanical strength and electrical insulation properties.
——Mainly used for molding powder, grinding wheel, friction plate, light bulb bonding, asbestos products, insulation board, decorative board.
The main purpose
Used as a tackifying resin for neoprene adhesives and as a vulcanizing agent for butyl rubber. Store in a cool, ventilated warehouse, away from fire and heat sources.
Nature and stability
1. Stable and stable
2. Forbidden substances strong oxidants
3. Conditions to avoid contact] Heat
4. Polymerization hazards do not polymerize