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Kohesi Bond KB 1631 FR-2 Two component, flame retardant epoxy for potting and encapsulating
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Product Highlights:
  • Can pass UL94V-0 flame retardant test
  • Extremely low smoke generation
  • Non-halogen filler
  • Room temperature cure
  • Convenient mix ratio of 1:1 by weight
  • Excellent resistance to fuels and water
Kohesi Bond KB 1631 FR-2 is a two component, room temperature curing epoxy system. This flame retardant epoxy generates low smoke and contains a non-halogenated filler. Although KB 1631 FR-2 cures hard at room temperature, the optimum cure schedule would be an overnight room temperature set-up followed by an addition of heat at 90°C for 2 - 3 hours. KB 1631 FR-2 offers an extensive service temperature range of -51°C to +90°C, as per UL 94V-0 specification. The flow properties make it ideal for use in potting and encapsulation applications. In addition to ease of application, KB 1631 FR-2 adheres well to a wide variety of substrates including metals, ceramics, most plastics and glass. It provides superior mechanical strength properties and dimensional stability. KB 1631 FR-2 offers phenomenal electrical insulation. It also offers excellent chemical resistance to a variety of fuels, oils, lubricants and water. Part A has a black color and Part B has an off white color. Also, it has a very convenient 1:1 mix ratio by weight. With a combination of Excellent performance, ease of use and excellent flame retardant properties, KB 1631 FR-2 is widely used in electronics , microelectronics, aerospace and various OEM applications.

Typical Applications:

  • Potting
  • Encapsulation
  • Casting

Information provided by Kohesi Bond Custom Engineered Adhesives

Vendors: Kohesi Bond is a pioneer in manufacturing over 300 grades of custom engineered adhesives, sealants, coatings, potting and encapsulation compounds. Our first-rate adhesives are tailor-fitted to meet your exact specifications and offer superior strength and performance in your application. Learn more about Kohesi Bond’s industry-ready products at kohesibond.com.

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Physical PropertiesOriginal ValueComments
Viscosity 32000 - 45000 cPPart B
 40000 - 72000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 75
Tensile Strength >= 3200 psi
Adhesive Bond Strength >= 1300 psiTensile Lap Shear, Al/Al
 
Electrical PropertiesOriginal ValueComments
Dielectric Constant 4.51
@Frequency 60 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 50.0 - 60.0 µm/m-°C
Maximum Service Temperature, Air 90.0 °C
Minimum Service Temperature, Air -51.0 °C
Flammability, UL94 V-0
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 - 3.00 hour
@Temperature 90.0 °C
Option 2
 2.00 - 3.00 hour
@Temperature 90.0 °C
Optimum Cure: overnight at 23°C plus 2 - 3 hours at 90°C
 48.0 - 72.0 hour
@Temperature 23.0 °C
Option 1
Working Life 80.0 - 150 min100 g of mixed epoxy
Shelf Life 12.0 Monthin original unopened containers

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PKOHESI961 / 249140

Specialty Compounds RTP Company

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