Datasheet

ManualsBrandsElectrolube ManualsChemicalsModified Alkyd Conformal Coating Spray 200 ml

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DCA

Modified Alkyd Conformal Coating (SCC3)

DCA is a flexible, transparent and unique modified alkyd conformal coating specifically designed for the

protection of electronic circuitry. It has been formulated to meet the highest defence standards in both Europe

and the United States. It holds approvals including the British Ministry of Defence (MOD) DEF-STAN 59/47

Issue 4, and Underwriters Laboratories UL746E-QMJU2.

 Can be cured at ambient or elevated temperatures; optimum properties achieved by heat curing

 Heat-cured coating is resistant to many solvents used within aerospace and automotive industries

 Suitable for use at temperature extremes; very wide operating temperature range

 Can be reworked using specialist removal product, Electrolube CCRG

Approvals RoHS-2 Compliant (2011/65/EU): Yes

UL746E-QMJU2: Approved File Number: E138403

DEF-STAN 59/47 (Issue 4): Yes

IPC-CC-830: Meets approval

NATO Stock Numbers: 6850996642823 (DCA05L)

6850992530057 (DCA200H)

Liquid Properties Appearance: Clear Pale Straw

Density @ 20°C (g/ml): 0.97 (Bulk), 0.78 (Aerosol)

VOC Content: 63% (Bulk) 73% (Aerosol)

Flash Point: 27°C (Bulk), <23°C (Aerosol)

Solids content: 37% (Bulk), 27% (Aerosol)

Viscosity @ 20°C (mPa s): 180 - 250 (Bulk)

Touch Dry: 50 - 55 minutes

Recommended Curing Schedule*: 2 Hours @ 20°C followed by:

2 - 24 Hours @ 90°C to 120°C

*(Maximum Solvent Resistance Achieved @ 120°C; Ambient Curing Schedule: 24 Hours @ 20-25°C)

Coverage @ 25 µm: 14.8m² per litre (Bulk), 2.16m² (200ml Aerosol)

Cured Film Coating Colour: Colourless

Operating Temperature Range: -70°C to +200°C

Flammability: UL94 V-1

Thermal Cycling (IPC-CC-830): Meets approval

Coefficient of Expansion: 90ppm

Dielectric Strength: 90 kV/mm

Dielectric Constant: 3.95 @ 1 MHz

Insulation Resistance: 1 x 10

Ohm (DEF-STAN 59/47)

Dissipation Factor (@1 MHz, 25°C): 0.037

Moisture Resistance (IPC-CC-830): Meets approval

Summary of content (5 pages)

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Page 1 DCA Modified Alkyd Conformal Coating (SCC3) DCA is a flexible, transparent and unique modified alkyd conformal coating specifically designed for the protection of electronic circuitry. It has been formulated to meet the highest defence standards in both Europe and the United States. It holds approvals including the British Ministry of Defence (MOD) DEF-STAN 59/47 Issue 4, and Underwriters Laboratories UL746E-QMJU2.
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Page 2 Description Packaging Order Code Shelf Life DCA Conformal Coating 200ml Aerosol 1 Litre Bulk 5 Litre Bulk DCA200ML DCA01L DCA05L 36 Months 48 Months 48 Months Conformal Coating Thinners 1 Litre 5 Litre Bulk DCT01L DCT05L 36 Months 36 Months Conformal Coating Removal Gel 1 Litre Bulk CCRG01L 36 Months Directions for Use DCA can be sprayed, dipped or brushed. The thickness of the coating depends on the method of application (typically 25-75 microns).
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Page 3 Viscosity Change with Temperature - DCA Viscosity (mPa s) 250 200 150 100 50 0 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Temperature (⁰C) Viscosity Chart - DCA:DCT Viscosity (mPa s) 250 200 150 100 50 0 1:0 20:1 10:1 5:1 2:1 1:1 1:1.5 1:2 1:2.5 1:3 Mix Ratio - DCA:DCT Spraying - Aerosol When applying DCA in aerosol form care must be taken to ensure the can is not shaken before use. Shaking the can will introduce excessive air bubbles and will give a poor coating finish.
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Page 4 To ensure penetration of the coating beneath the components and in confined spaces, spray the assembly from all directions to give an even coating. After spraying, the boards should be placed in an air-circulating drying cabinet following the curing schedule highlighted on page 4/5. Dip Coating Ensure that the coating material in the container has been agitated thoroughly and has been allowed to stand for at least 2 hours for all the air bubbles to disperse.
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Page 5 Commercial Most commercial users will gain satisfactory performance from this coating by curing for two hours at 90°C after the two-hour ambient cure. This will give limited resistance to solvents. Military If the assemblies are to be used under conditions of high temperature or be exposed to extremes of thermal cycling, the coating should be cured for 12 hours at ambient followed by 24 hours at 90°C. For maximum solvent resistance cure at 2 hours at ambient following by 24 hours @ 120°C.