● About Phenolic Resins
▶ Features of Phenolic Resin Cured Materials
- Structure : A net-like three-dimensional cross-linking structure from heat curing
- Heat resistance : Highest level (minimum) of heating loss in general purpose resins
- Residual carbon : Residual carbon ratio is the highest level out of general purpose resins, suitable for carbon materials
- Flame resistance : Difficult to burn, produces little smoke when burned
- Chemical resistance : Excellent acid/solvent resistance, weak against alkalis
- Mechanical properties : High strength, high hardness
- Binding strength : Binds under high temperatures and high stress, suited to reinforcing flexible/low strength materials
- Brittle : Too hard, brittle, and cure shrinkage, film forming is normally difficult
- Coloring / Discoloration : Changes from yellowish brown to reddish brown to blackish brown (primarily oxidative discoloration)
▶ Precautions when Handling Phenolic Resins
- Dissolved resin (resol) : Increased viscosity/coloration by deterioration with age (refrigerated storage)
- Powdered resin/granulated resin : Blocking from moisture absorption, fusion (sealed storage, low temperature storage)
- When using the product, please check the material safety date sheet (MSDS) and the precautions on the product's label.
- When handling the product in a specialized manner, take the appropriate safety measures for the application or method.
- When disposing of the product or container, dispose of it appropriately according to the Waste Disposal Act, Air Pollution Control Act, and other laws listed on the MSDS.
- The content listed in the catalog was created based on technical information and testing methods that DIC believes to be reliable at the time, but this content is not a guarantee of results in the customer's own usage conditions or of non-infringement of intellectual property rights. Customers should fully research, test, and verify the product before use.
- Regulation-related: Monomer
| Phenol | Formaldehyde |
|---|
Permissible Concentration
(Japan Society of Occupational Safety)
(ACGIH) | 5 ppm (19 mg/m3 skin)
TWA 5 ppm | 0.1/max; 0.2 ppm
0.12/max; 0.24 mg/m3
0.3 ppm |
Industrial Safety and Health Act | Labeled substance
0.1% or higher | Labeled substance
0.1% or higher |
PRTR*1 | Class 1 designated chemical substance | Class 1 designated chemical substance
Specific class 1 designated chemical substance |
Ordinance on Prevention of Hazards due to Specified Chemical Substances | Class 3 substance | Class 2 substance |
Poisonous and Deleterious Substances Control Law | Deleterious substance | Deleterious substance |
Fire Service Act | Designated combustible
Combustible solid | Designated combustible
Combustible liquid (formalin)
Combustible solid (paraform) |
PRTR = Chemical Substances Control Law
● Major Applications
▶ Products Related to Automobiles/Steel/Iron :
Phenolic resin is widely used in applications related to automobiles and steel/iron because of characteristics that possess excellent heat resistance and durability.
For automotive applications, DIC stocks resins for friction materials including resins for clutch facings and resins for brakes.
For applications related to steel and iron, DIC has developed phenolic resins suitable to production of refractory materials which are essential in the high temperature production of steel, iron, cement, and glass.
▶ Molded Composite Material Products :
Phenolic resin is used in many impregnation processing applications including filters, separators, coatings, and laminates because of its characteristics of excellent heat resistance and mechanical strength.
In recent years FTP using phenolic resin has been gather attention because of demands for flame-retardant materials. DIC offers phenolic resins that support many kinds of FRP production methods.
▶ Environmentally-friendly Products :
DIC is involved in developing resins that are friendly to the environment, and we are developing low-free phenol resins by reducing the phenol monomers that remain in resol phenolic resins that had been technically difficult in the past.
And a portion of conventional resol phenolic resins have taken a solvent diluted form from their insolubility in water.
The PHENOLITE PE Series is environmentally friendly and the resin, which can express the same abilities as solvent diluted types, has been made aqueous dispersible.
▶ Housing-related Products :
In insulation resins for glass wool and rock wool and wood processing resins for plywood, particle board, and laminated wood, DIC is developing environmentally-friendly phenolic resins appropriate to the needs of the age for resistance to severe weather conditions by adding new synthesizing techniques to our accumulated technologies cultivated over the years.