BECTRON PL 4122-37

Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium

BECTRON PL4122-37

Main features

  • Transparent Urethane-Alkyd Conformal Coating
  • 30-Minute 80 deg C Cure
  • 1 x 10^15 ohm-cm Volume Resistivity

Product Description

Bectron® PL 4122-37 E BLF FLZ is a transparent urethane-modified alkyd conformal coating for protecting printed circuit boards and electronic components. The low-viscosity varnish is formulated for room-temperature or oven curing and supports select-coat, spray, automated dipping, brushing, and hand-spray processes. The cured thin film retains flexibility and documented dielectric properties under environmental exposure. Supported applications include electronics used in automotive, marine-navigation, industrial, and corrosive-gas environments, together with hybrids, surface-mount devices, and discrete components. The 37% solids grade is intended for general coating applications.

Key features

  • 37% solids grade: The PL 4122-37 grade has a non-volatile content of 37 ± 1% under ISO 3251 conditions.
  • Flexible cure options: Documented cure schedules include 16 hours at 23°C or 30 minutes at 80°C.
  • Thin-film electrical properties: Typical cured data include 1 × 10¹⁵ ohm·cm volume resistivity and CTI 600.

Applications / Suitable for

  • Printed circuit boards exposed to automotive, marine-navigation, industrial, or corrosive-gas environments
  • Hybrid electronic assemblies
  • Surface-mount devices and discrete components
Product Family

BECTRON PL 4122-37

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TDS, SDS & Technical Documents

Technical Specifications

Thermal Properties
Temperature Resistance
Temperature resistance is the maximum temperature that the material or product can withstand for a period of time. The temperatures listed should be considered as guidelines for an operating temperature of about 30 minutes. Typically, the material can withstand much longer times at temperatures about 20°C lower and can withstand much higher temperatures for short, intermittent times.
134 ˚C
Electrical Properties
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material. Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property. As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
112 kV/mm
Permittivity
In electromagnetism, the absolute permittivity, often simply called permittivity and denoted by the Greek letter ε, is a measure of the electric polarizability of a dielectric.
3.5 F/m
Chemical Properties
Water Absorption
1.5 %

Additional Information

Technical properties

As-supplied / before-processing properties

Typical as-supplied or mixed-state values unless otherwise stated. These values are not sales specifications.

Property Value Unit Method / condition
Non-volatile content 37 ± 1 % ISO 3251; 1.5 g, 2 h at 130°C
Flow time 40 ± 3 s DIN EN ISO 2431, 4 mm cup at 23°C
Approximate viscosity 50 mPa·s Associated with 4 mm cup flow time
Density 0.86 ± 0.01 g/cm³ DIN EN ISO 2811-2 at 23°C
Shelf life 6 months At 23°C
Dust-dry time 0.25 h At 23°C
Touch-dry time 1 h At 23°C
Cure options 16 h at 23°C; 0.5 h at 80°C N/A Air cure or batch-oven cure
Technical properties

After-processing / final-state properties

Typical final-state values under the stated system and test conditions. These values are not sales specifications.

Property Value Unit Method / condition
Service temperature -50 to 105 °C Documented range
Shrinkage 16 % CQP014-1
Heat-aging weight loss 11 % ASTM C792
Staining No staining N/A ASTM D925 on common substrates

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