Hydroxyl Functional Polyester
REACTOL™ 1979 A is a Lawter™ polyester resin. REACTOL™ 1979 A is a low molecular weight hydroxyl functional polyester. REACTOL™ 1979 A exhibits exceptional gloss in overprints and pigmented inks. It offers good adhesion and flexibility, and low viscosity and good pigment wetting characteristics.
REACTOL™ 1979 A is compatible with nitrocellulose and cellulose esters. It can be cross-linked with melamine to form a glossy, thermoset coating with outstanding color retention.
| Property | Value | Test method / Standard |
|---|---|---|
|
Softening Point
|
88 °C
|
Ring and Ball |
|
Acid Value
|
4 mg KOH/g
|
Titration |
|
Viscosity
|
4 seconds
|
Gardner-Holdt (60 % in Ethanol), E:E, 25°C |
|
Color
|
1
|
Gardner Color |
|
OH Value
|
330 mg KOH/g
|
Value based on solid resin |
REACTOL™ 1979 A is shipped in 450 lb drums.
Shelf life from date of production is approximately 12 months. The resin should be stored at temperatures under 30°C (86°F).
If the resin is stored improperly or for a longer period of time, an increase in viscosity and cloud point is possible.
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