HumiSeal 1B12

HumiSeal 1B12Acrylic Conformal CoatingSystem DescriptionA low viscosity, fast air drying, single component, general purpose conformal coating for printed circuitassemblies. Particularly suited for impregnating coil and for coating ferrite cores. Can be soldered througheasily or chemically removed.Properties of Liquid HumiSealDensity, (g/cm 3 ) per ASTM, Meth. D1475 0.87 ± 0.02Solids Content, % by weight per Fed-Std-141, Meth.4044 20 ± 3Viscosity, centipoise per Fed-Std--141, Meth. 4287Viscosity, centipoise per Fed-Std-141, Meth.4287Flashpoint, 0 C ( 0 F) per ASTM, Meth. D56VOC ( grams / liter )Drying Time to Handle per Fed-Std-141, Meth.4061Recommended Curing ConditionsTime Required to Reach Optimum PropertiesThinner, if needed (dipping & brushing)(spraying)Pot Life at Room TemperatureShelf Life at Room TemperatureProperties of Cured HumiSealThermal PropertiesContinuous Use Operating Range 0 C-65 0 C to +125 0 CThermal Shock, per MIL-I-46058CPassesSolderabilityGoodCoefficient of Thermal Expansion - DMA56ppm / 0 CGlass Transition Temperature - TMA32 0 CYoung‘s Modulus - DMA1400 psi30 ± 540 max.-170110 minutes24 hrs @ RT or 30 min.@ 76 0 C7 daysThinner 503Thinner 52112 months12 monthsPhysical PropertiesClarityBuild per Dip, mils, per ASTM,Meth.D823Flexibility, per MIL-I-46058CWeather ResistanceElectrical PropertiesDielectric Withstand Voltage, volts per MIL-I-46058CDielectric Breakdown Voltage, volts, per ASTM, Meth. D149Dielectric Constant, at 1MHz and 25 0 C, per ASTM-D150-65TDissipation Factor, at 1MHz and 25 0 C, per ASTM-D150-65TInsulation Resistance, ohms, per MIL-I-46058CMoisture Resistance, ohms, per MIL-I-46058CTransparent0.5Very GoodVery Good>1,50060002.80.01250 x 10 1230 x 10 9Chemical PropertiesMain ConstituentAcrylicFungus Resistance, per ASTM-G21PassesResistance to ChemicalsFairValues are not intended for use in preparation of specifications.Revision 20-05-08

APPLICATIONCleanliness of the substrate is of extreme importance for the successful application of a conformalcoating. Surfaces must be free of moisture, dirt, wax, grease and all other contaminants. Contamination underthe coating will cause problems, which may lead to assembly failures.HumiSeal coatings may be applied by brush, dip or spray.DippingDepending on the complexity, density and configuration of components on the assembly, it may benecessary to reduce the viscosity of HumiSeal 1B12 with HumiSeal Thinner 503 in order to obtain auniform film. Once optimum viscosity is determined, a controlled rate of immersion and withdrawal (2 to 6" perminute) will further insure even deposition of the coating and ultimately a uniform film. During the application,evaporation of solvent causes an increase in viscosity, which should be adjusted by adding small amounts ofThinner 521. Viscosity in the dip tank should be regularly checked by the use of a simple measuring devicesuch as a Zahn or Ford viscosity cup.SprayingHumiSeal Type 1B12 can be sprayed using conventional spraying equipment. As a rule, the addition of Thinner521 is necessary to assure a uniform spray pattern resulting in pinhole free film. The amount of thinner andspray pressure will depend on the specific type of spray equipment used. The spraying should be done underan exhaust hood so that the vapour and mist are carried away from the operator. The recommended ratio ofHumiSeal Type 1B12 to HumiSeal Thinner 521 is 1 to 1 by volume, as a starting point. The quantities may beadjusted to obtain a uniform coating.BrushingHumiSeal Type 1B12 may be brushed with a small addition of HumiSeal Thinner 503. Uniformity of the filmdepends on component density and operator's technique.StorageHumiSeal Type 1B12 should be stored at room temperature, away from excessive heat, in tightly closedcontainers. HumiSeal products may be stored at temperatures of œ18-38°C (0-100°F). Avoid direct sunlight.Prior to use, allow the product to equilibrate for 24 hours at 18-32°C (65-90°F).CautionThe solvents in Type 1B12 are flammable. Do not use in presence of open flame or sparks. Avoid inhalation ofvapours or spray. Use only in well-ventilated areas. Avoid contact with skin and eyes. If contact occurs, washwith soap and water. If swallowed, call physician immediately. Refer to MSDS before use.Technical support coatings: Europetechsupport@humiseal.comSales: Europeansales@humiseal.comHumiseal Europe2C Albany Park, Frimley Road,Camberley, Surrey,GU16 7PHPhone +44 (0) 1276 691100Fax +44 (0) 1276 691227Web: www.humiseal.comAll technical data in this bulletin is based on test results and is believed to be correct. However, since the end use of HumiSeal materials (and the mannerof storing and handling them) is beyond our control, we make no warranty-expressed or implied as to the fitness of use, results to be obtained from or effectsof use with respect to these materials. Their use shall be solely by the judgment of and at the risk of the user notwithstanding any statement in thisbulletin. © Copyright 1992 CHASE CORPORATION.Revision 20-05-08