MACROLIC 7331
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High Solid Acrylic resin providing fast drying with high solid and excellent hardness
PRINCIPAL PROPERTIES
MACROLIC 7331 is a hydroxyl function acrylic copolymer designed to crosslink at room temperaturewith polyisocyanate.
APPLICATION
- AUTO REFINISH
CHARATERSTICS
- High Gloss
- Good Hardness
- Good leveling properties
- Excellent Chemical and Application properties
- Good Pot life
- Excellent Adhesion
PHYSICAL CONSTANTS
| Viscosity as such in Brook Field RVT SSA /S – 3, RPM – 12 at 25°C Temperature | 46 – 98 Poise |
| Acid Value (mg KOH/gm) | 12 Max |
| Color (APHA/Pt-Co) | 20 Max |
| Hydroxyl Equivalent Weight | Approx. 560 |
| Hydroxyl Value (mg KOH/gm) | 95 - 105 |
SOLUBILITY
| Xylene | Complete Soluble |
| Toluene | Complete Soluble |
| n-Butyl Acetate | Complete Soluble |
| Butyl Cellosolve Acetate | Complete Soluble |
| C-9 | Complete Soluble |
| Ethyl Acetate | Complete Soluble |
| n-Butanol | Limited Soluble |
| MTO /LAWS | Not Soluble |
DELIVERY FORM
| MACROLIC – 7331 | 70 ± 2% in Xylene/Butyl Acetate |
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 7331 70% 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 -7331 70% 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.