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silicone resin
silicone resin

LR-163 Organic Silicone Resin

Silfluo LR-163 is a flexible organic silicone resin supplied at 50% solid content in toluene-containing solvent, providing continuous heat resistance, electrical insulation, and moisture resistance in the cured film. The flexible cure profile distinguishes LR-163 from hard/brittle silicone resin grades, making it suitable for flexible mica tape, flexible varnished glass cloth, and conformal coating applications where film flexibility is required alongside thermal and electrical performance.

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Typical Technical Properties of Organic Silicone Resin LR-163


Silfluo Code:

LR-163

Appearance

Colorless to light yellow liquid, opalescence is permitted

Solid content (%)

50±1

Curing Time (200°C on copper sheet, h):

≤2

Viscosity (Flow Cup No. 4 at 25°C, s):

15-50

Thermal Aging Resistance (200°C, h):

≥300

Breakdown Strength (KV/mm,)

Standard Conditions (20±5°C):

≥ 55

Elevated Temperature (200±2°C):

≥ 30

After Humidity Exposure (24h at 20±5°C, 95±3% RH):

≥ 35

Volume

Resistance
(Ω.cm)

Standard Conditions(20±5°C)

≥ 1018

Elevated Temperature (200±2°C)

≥1011

After Humidity Exposure (24h at 20±5°C, 95±3% RH):

≥1012


Applications of Organic Silicone Resin LR-163


  • Flexible Electrical Insulation

    Used for manufacturing flexible mica tapes, flexible mica sheets, and flexible varnished glass cloth.

  • Motor and Coil Impregnation

    Used as an insulating varnish for motor coil impregnation and fiberglass sleeving coatings.

  • Electronic Encapsulation

    Applied as a conformal coating or sealant for transistors and electronic components.

  • Heat-Resistant Coatings

    Used as a binder for formulating flexible, high-temperature resistant coatings.


Use Reference of Organic Silicone Resin LR-163


  • Diluent Purity: Any diluents or solvents introduced must be anhydrous and free of acids, alkalis, amines, or other reactive compounds. Contamination will degrade adhesion, drying profile, and film properties.

  • Safe Handling and Ventilation: This product contains toluene and other flammable, volatile solvents. Explosion-proof ventilation must be maintained during processing and application. Keep away from open flames, ignition sources, and static electricity sources. Follow occupational safety practices and use appropriate personal protective equipment (PPE).

  • Recommended Solvents: Compatible and dilutable with ketones, esters, toluene, xylene, and similar solvents.


Package & Storage of Organic Silicone Resin LR-163


  • In 200kg drum.

  • Keep in cool, dry place. Avoid acid and alkali contact. Avoid direct sunlight. Transported as dangerous goods. The shelf life is 6 months(can still be used if the product is qualified after the expiration date).

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