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Master Bond adhesives

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Kohesi Bond KB 1631 HTC-1 Two component, cryogenically serviceable epoxy for bonding and sealing
Categories: Polymer; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Product Highlights:
  • Superior thermal conductivity
  • Low coefficient of thermal expansion (CTE)
  • Thixotropic Paste
  • Superior dimensional stability
  • Exceptional electrical insulation properties
  • Capable of passing NASA low outgassing
Kohesi Bond KB 1631 HTC-1 is a two component epoxy system suitable for bonding and sealing. It has a 100:60 (Part A: Part B) mix ratio by weight. It offers stellar thermal conductivity and is capable of passing NASA low outgassing test. This epoxy system readily cures at room temperature and can achieve faster cures at elevated temperatures. The optimal cure schedule is an overnight room temperature set-up followed by a heat cure at 70°C - 90°C for 3 - 5 hours. KB 1631 HTC-1 can withstand severe thermal shocks and cycling even at cryogenic temperatures. It offers an extensive service temperature range of 4K (-269.15°C) to +200°C. It has outstanding physical strength properties and low coefficient of thermal expansion (CTE). KB 1631 HTC-1 adheres well to a wide variety of substrates including metals, ceramics, most plastics and glass. In addition to superior electrical insulation, dimensional stability and thermal conductivity, KB 1631 HTC-1 also offers excellent chemical resistance to a variety of acids, bases, fuels, oils and water. Part A and Part B have an off-white color. Owing to its Excellent performance and vacuum compatibility KB 1631 HTC-1 is widely used in electronics, semiconductor, cryogenic and major OEM applications.

Typical Applications:

  • Bonding
  • Sealing

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 45000 - 90000 cPPart B
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 80
Tensile Strength >= 8200 psi
Tensile Modulus >= 500000 psi
Adhesive Bond Strength >= 1900 psiTensile Lap Shear, Al/Al
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+14 ohm-cm
Dielectric Strength 450 V/mil
@Thickness 0.317 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 15.0 - 20.0 µm/m-°C
Thermal Conductivity 1.50 - 1.60 W/m-K
Maximum Service Temperature, Air 200 °C
Minimum Service Temperature, Air -269 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 - 3.00 hour
@Temperature 90.0 °C
Option 2
 3.00 - 5.00 hour
@Temperature 70.0 - 90.0 °C
Optimum Cure: overnight at 23°C plus 3 - 5 hours at 70°C - 90°C
 48.0 - 72.0 hour
@Temperature 23.0 °C
Option 1
Working Life 30.0 - 65.0 min100 g of mixed epoxy
Shelf Life 12.0 Monthin original unopened containers
 
Descriptive Properties
ViscosityThixotropic PastePart A
 Thixotropic PasteMixed

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PKOHESI962 / 249141

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