LB - 3500 UV moisture dual curing three proofing paint (three proofing adhesive)

LB - 3500 is a one component, high solid, UV and moisture curable modified polyurethane acrylate laminating product, which can be cured by moisture in the shadow area that cannot be illuminated by UV light. Coated on printed circuit board (PCB), electronic components bonding fixed protection, all kinds of electronic components and solder joints. The protective film has excellent chemical resistance, surface hardness, flexibility and moisture resistance. The product contains fluorescent indicator, which can be displayed under ultraviolet lamp and is easy to detect. Low odor, suitable for machine spraying.

Typical use

The electronic circuit is bonded, fixed, waterproof, moisture-proof, mildew proof, anti-corrosion, anti-aging, improves the insulation strength, and isolates contact points from air to air.

Properties of glue solution:

Appearance: colorless to light green with fluorescent transparent liquid, no mechanical impurities

Viscosity (25 ℃, NDJ - 1 rotational viscometer) / mPa . s： 250～300cps ( 25 ℃ rotary viscometer ) Applicable temperature range: - 40℃～＋135℃

Performance index of cured product

Curing: surface dry 1 - 5sec ( ＞600mJ / cm2 @ 365nm )； Practical work > 168hr ( 25℃、65 % humidity ) Water absorption ( 24h , 25℃ )/%: ＜0 . 5 glass transition temperature ( Tg )/ ℃： 80

shear strength / MPa : Elongation at break > 10 /% ： 120

Film thickness ( um ): twenty-five - 150 hardness / Shao D: 60

Coefficient of thermal expansion ( PPM / ℃； GB1036 - 89） 56

Electrical performance:

Dielectric constant (1MHz; GB1693 - 81）： 3 . 2 dielectric strength (kV) / mm； GB507 - 86): 55 surface resistivity /Ω ：7 . three × 1015 volume resistivity (ohm - cm； GB1410 - 89）3 × one thousand and fifteen

usage method

The product is sensitive to light. In the process of storage and operation, it is necessary to control the exposure of various light sources such as sunlight, UV light and other artificial lighting sources;

When using, it is better to clean the coated surface, remove surface impurities, oil stains and other pollutants to obtain the expected coating effect;

Manual brushing, mechanical spraying, mechanical dip coating and other coating methods can be used;

Curing: UV curing, the typical wavelength is 365 nm, the line power is more than 100 W / The film after UV curing should be dry, and the film without UV irradiation needs 2 cm moisture curing ~ It takes 168 hours for the film to reach the best performance in 3 days.

Storage method and shelf life

Store in dark, cool and dry place for 5 days - The shelf life at 20 ℃ is 12 months.

matters needing attention

This product is safe and non-toxic after curing, but before curing, try to avoid contact with skin. If it splashes into eyes, use plenty of water quickly.

statement

The technical data involved in this paper are typical values, which are not used as product acceptance standards and are only for reference. The above data are obtained under laboratory standard conditions and are considered to be reliable. However, due to different working conditions, different surface conditions and curing conditions, it is normal for the actual performance data to have some changes. Storage conditions, transportation and other factors will affect the stability, physical and mechanical properties of the adhesive. Leber is not responsible for the results obtained by anyone using methods beyond our control. It is suggested that users should carry out experiments according to the data provided in this paper before formal use.