MACROLIC 8238
Download Technical Data Sheet
2K Hydroxy functional resin used in industrial OEM and wood segment. Can be used for automotive paints requiring good gloss and gloss retention.
PRINCIPAL PROPERTIES
MACROLIC-8238 is hydroxyl functional acrylic copolymer designed to crosslink at room temperature with polyisocyanate.
APPLICATION
- AUTO REFINISH
- WOOD FINISH
CHARATERSTICS
- TWO PACK SYSTEM AUTO OEM OR REFINISHES COATINGS
- FAST DRYING TWO PACK COATING FOR THE INDUSTRIAL LACQUER SECTOR
- EXCELLENT FLOW & LEVELLING
- GOOD GLOSS
- BETTER OUTDOOR DURABILITY
- APPLICABLE TO METAL & PLASTIC SUBSTRATE.
- WOOD COATINGS.
PHYSICAL CONSTANTS
| Viscosity as such in Brook Field RVT SSA / S – 28, RPM – 100 at 25˚C Temperature | 20 – 30 Poise |
| Acid Value (mg KOH/gm) | 10 Max |
| Color (APHA/Pt-Co) | 20 Max |
| Hydroxyl Equivalent Weight | Approx. 590 |
| Hydroxyl Value (mg KOH/gm) | 90 - 100 |
SOLUBILITY
| Xylene | Complete Soluble |
| n-Butyl Acetate | Complete Soluble |
| Ethyl Glycol Acetate | Complete Soluble |
| Methyl Ethyl Ketone | Complete Soluble |
| n-Butanol | Complete Soluble |
| Ethyl Alcohol | Complete Soluble |
| MTO /LAWS | Not Soluble |
COMPATIBILITY
| MF – 910/268/970 | Compatible |
| UF – 8/9001 | Limited Compatible |
| Short Oil in Xylene/Toluene | Compatible |
| Long Oil in MTO/LAWS | Not Compatible |
DELIVERY FORM
| MACROLIC-8238 | 60 ± 2% in Xylene/PMA |
Reaction Ratio:
The reaction ratio is calculated from the respective equivalent weight or hydroxyl and isocyanate content of the reactants.
Conventional polyisocyanates such as Desmodur N75 and AR - 75 can be used successfully.
Catalysts:
To increase the initial rate of cure of MACROLIC-8238 60% based paints, at both ambient temperature and under lowbake conditions, the use of tin catalyst in the form of Di Butyl tin Di Laurite is strongly recommended
Solvents:
The solvents chosen for paints and lacquers based on MACROLIC-823860% should be free of water and should notcontain groups that react with isocyanates. Ester and Ketones are True solvents and aromatic hydrocarbons are used as diluentsfor this system.