Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- CASE Ingredients Functions
- Technologies
Features & Benefits
- CASE Ingredients Features
- Distinguishing Features
Films based on Phenodur PR 401 are almost colorless. The Phenodur grades suitable for combination with epoxide resins are PR 217, PR 285, PR 401, PR 722, PR 723 and PR 897.
Applications & Uses
- Applications
- Properties and Uses
Can coating
After stoving, combinations of 20 - 40 % Phenodur PR 401 and 80 - 60 % Beckopox EP 307 or EP 309 (each calculated on the solids content) yield high-adhesion, chemically resistant films with good flexibility for the internal and external coating of cans, tubes and other packaging containers used in the food and luxury commodity industries.
Chemically resistant protective coatings
Phenodur PR 401 can be used as sole binder in high resistant stoving enamels. The stoved films are comparatively brittle and can only be used on rigid substrates. Polyvinyl butyrals can be employed as plasticizing agents. The main products suitable for combination with epoxide resins is Phenodur PR 401. Since plastification reduces the general resistance of the stoving enamel coatings against chemicals, the mixing ratios have to be adjusted according to the resistance and film qualities required. Epoxide resin combinations with a predominant phenolic resin constituent have proved successful for coatings exposed to acid agents. Good film flexibility and resistance to alkalis are achieved by using rather large amounts of epoixide resin. Systems being employed for protective coatings of this type can be pigmented with inert fillers and pigments. In multi layer coatings, the first coats applied are not fully cured, but dried at relatively low temperatures only. The coating system as a whole is cured together with the last coat applied (e.g. 30 min/180 - 210 °C). Coatings based on this principle are used for chemical resistant interior linings of vessels, apparatus and pipelines in the chemical and allied industries.
- Processing
Preparing the resin solution and diluents
The phenolic resin solutions are mixed with the other resin solutions at room temperature. Glycol ethers, esters, diacetone alcohol and higher ketones are suitable as solvents. Aromatic hydrocarbons can be used as thinners. Phenodur PR 401/epoxide resin combinations can also be influenced to a considerable degree in their film properties by a preliminary precondensation process. The precondensation of the two components in their solution has to be carried out in closed containers, under reflux condenser and constant agitation. At a temperature of 110 - 120 °C this reaction is completed after about 2 hours. Precondensation in this way effects flow properties and lacquer stability.
Stoving conditions
Depending on the application and film thickness, stoving condition lie between the limits of 30 to 10 minutes at 180 to 210 °C. Higher temperatures may cause a loss of flexibility. For relatively thin films, as applied for can coating, 10 to 15 min/190 - 200 °C is sufficient.
Catalysis
The use of acid cataysts as Additol XK 406 is recommended.
Properties
- Physical Form
- Typical Properties
Value | Units | Test Method / Conditions | |
Iodine Color Number | max. 2 | — | — |
Density (20°C) | approx. 1.03 | g/cm³ | — |
Non-Volatile Matter | 70 - 74 | % | — |
Dynamic Viscosity | 200 - 1000 | mPa.s | — |
Flash Point | 34 | °C | — |
Technical Details & Test Data
- Dilutabilty
solvent naphtha
methoxypropyl acetate
white spirit
ethyl acetate
acetone
methoxypropanol
methyl ethyl ketone
ethanol
methyl isobutyl ketone
butanol
cyclohexanon
xylene
butyl acetate
unlimited dilutability
unlimited dilutability
very limited or no dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
unlimited dilutability
Packaging & Availability
- Country Availability
- Regional Availability
Storage & Handling
- Shelf Life
- 2 years
- Storage and Handling
At temperatures up to 25 °C storage stability packed in original containers amounts to at least 730 days.