Paisley Products N389-2900 is a red colored air drying, single component, acrylic base system suitable for general-purpose coating of printed circuit assemblies. The cured coating is readily repairable.
Country of Origin
Schedule B Code
|Properties of Liquid N389-2900|
|Density, g/cm3 per ASTM, Meth. D1475||.91 +/- .02|
|Solids Content, % by weight per Fed-St-141, Meth. 4044||35 +/- 3|
|Viscosity, centipoise per Fed-Std-141, Meth. 4287||470 +/- 20|
|Drying Time to Handle per Fed-Std-141, Meth. 4061||10 minutes|
|Recommended Coating Thickness, microns||25-75 mils|
|Recommended Curing Conditions||24 hrs @ rm. temp or 30 min. @ 76 C|
|Time Required to Reach Optimum Properties||7 days|
|Thinner, if needed (dipping & brushing)||Thinner 503|
|Recommended Stripper||Stripper 1080|
|Shelf Life at Room Temperature|| 12 months|
|Properties of Cured N389-2900 Red|
|Continuous Use Operating Range (°C)||-65 to 125|
|Thermal Shock, 50 cycles per MIL-I-46058C||Passes|
|Coefficient of Thermal Expansion – DMA||77 ppm/°C|
|Glass Transition Temperature – TMA||15°C|
|Modulus – DMA||69.5 MPa|
|Flammability, per UL 94||HB|
|Dielectric Withstand Voltage, volts per MIL-I-46058C||>1,500|
|Dielectric Constant, at 1MHz and 25°C, per ASTM-D150-65T||2.03|
|Dissipation Factor, at 1MHz and 25°C, per ASTM-D150-65T||.01|
|Insulation Resistance, ohms, per MIL-I-46058C||350 x 1012 (350T)|
|Moisture Resistance, ohms, per MIL-I-46058C||40 x 109 (40G)|
|Fungus Resistance, per ASTM-G21||Passes|
|CHANGE OF STATE||VALUE/AREA||UNIT||METHOD|
|FLASH POINT:||-1(30)|| C(°F)||TCC|
|SPECIFIC GRAVITY:||.88||H2O = 1|
|% VOLATILE BY VOLUME:||63-67||%|
|SOLUBILITY IN WATER: NEGLIGIBLE|
|FLAMMABLE LIMITS:||LEL 1.6||UEL 11.2|
|EVAPORATION RATE:||3.62||BUAC = 1|
Arno N389-2900 Application
Cleanliness of the substrate is of extreme importance for the successful application of a conformal coating. Surfaces must be free of moisture, dirt, wax, grease, and all other contaminants. Contamination under the coating will cause problems that may lead to assembly failures.
N389-2900 Red coating may be applied by brush, dip or spray.
Depending on the complexity, density and configuration of components on the assembly, it may be necessary to reduce the viscosity of N389-2900 Red with Thinner 503 in order to obtain a uniform film. Once optimum viscosity is determined, a controlled rate of immersion and withdrawal (2 to 6" per minute) will further insure even deposition of the coating and ultimately a uniform film. During the application, evaporation of solvent causes an increase in viscosity that should be adjusted by adding small amounts of Thinner 521. Viscosity in the dip tank should be regularly checked by the use of a simple measuring device such as a Zahn or Ford viscosity cup.
N389-2900 Red can be sprayed using conventional equipment. As a rule, the addition of Thinner 521 is necessary to assure a uniform spray pattern resulting in pinhole free film. The amount of thinner and spray pressure will depend on the specific type of spray equipment used. The spraying should be done under an exhaust hood so that the vapor and mist are carried away from the operator. The recommended ratio of N389-2900 Red to Thinner 521 is 1 to 1 by volume, as a starting point. The quantities may be adjusted to obtain a uniform coating.
Brushing N389-2900 Red may be brushed with a small addition of Thinner 503. Uniformity of the film depends on component density and operator's technique.
N389-2900 Red should be stored at room temperature, away from excessive heat, in tightly closed containers. This product may be stored at temperatures of 0-35°C. Avoid direct sunlight. Prior to use, allow the product to equilibrate for 24 hours at 18 to 32°C.
Liquid N389-2900 Red coatings are flammable. Do not use in presence of open flame or sparks. Avoid inhalation of vapors or spray. Use only in well-ventilated areas. Avoid contact with skin and eyes. If contact occurs, wash with soap and water. If swallowed, call physician immediately.