SYNTHALAT A 077 is a polyisocyanate-curing acrylic resin primarily used in two-pack coatings, which are air- and oven-drying in combination with aliphatic polyisocyanates. It offers good mechanical properties, resistance to chemical attack, and weathering. Here's a breakdown of its characteristics and properties:
Characteristics:
- Supplied as: A = 60% in shellsol A, B = 60% in xylene
- Hydroxyl value: 80-100
- Hydroxyl content: Approximately 2.6% (relative to non-volatile content)
- Flow time in seconds (50% in Shellsol A): 50-60
- Viscosity (as supplied): 1300-2300 mPas
- Gardner colour value: A (50% in Shellsol A) < 2, B (as supplied) < 2
- Non-volatile content: 60 +/- 1%
- Flash point: A: Approximately 40°C, B: Approximately 24°C
- Density: A: 0.983 g/ml, B: 1.01 g/ml
Pigmentation: Any neutral pigments or fillers are suitable for pigmentation with SYNTHALAT A 077. However, basic pigments and pigments containing soluble metal compounds may affect curing and shorten the pot life of coating batches once mixed.
Mixing Ratio with Polyisocyanates: Based on an equivalent reaction of the reactive groups (NCO : OH = 1 : 1), the recommended mixing ratio with polyisocyanates is calculated using the provided formula.
Solubility/Dilutability: SYNTHALAT A 077 can be thinned with various solvents, including ethyl acetate, butyl acetate, xylene, etc. Only non-aqueous solvents and those containing no hydroxyl groups may be used.
Compatibility: SYNTHALAT A 077 exhibits compatibility with various other products, as listed in the compatibility table. It is compatible with Synthalat A 045, A 055, A 065, A 060, A 085, A 088 "MS," A 090, A 135, A 141 HS, A 150, A 1613, A 1633, A 1653, Synthoester HD-080, HD 170 HS, NC chips E 510, and others.
Shelf-life: When properly stored, SYNTHALAT A 077 has a shelf life of at least one year.