LCA-4 is a highly filled gyro grade epoxy adhesive that has a low coefficient of thermal expansion, good dimensional stability, and excellent chemical resistance. It is proving useful in applications requiring bonding or hermetic sealing of metal, ceramic, glass and other substrates.

RTU Product Type: Epoxy Adhesive

Application Area: Avionic Components, Gyros, Gyroscopes

Compatible Substrates & Surfaces: Ceramic, Glass, Metal

Features: Chemical Resistant, Dimensional Stability, Low Coefficient of Thermal Expansion, Low Viscosity

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Application Area
Compatible Substrates & Surfaces
Segment
Usage Instructions
  • Stir well the contents of the container each time before removing material.
  • If the contents are hard or lumpy, warm to 200°F and mix thoroughly before removing material.
  • Prolonged storage at room temperature may redult in the Adhesive LCA-4 resin crystallizing.
  • Warming to 200°F will melt the resin and restore the adhesive to its original consistency.
  • Weigh the ingredients accurately so that each amount so that each amount specified does not vary more that 5%.

Properties

Cured Properties
ValueUnitsTest Method / Conditions
Specific Gravity (at 200°F, 2 hr)1.86-ASTM D792-A
Specific Gravity (at 200°F, 8 hr)1.86-ASTM D792-A
Specific Gravity (1 hr at 140°F + 16 hr at 160°F)1.87-ASTM D792-A
Hardness (at 200°F, 2 hr)92-ASTM DI 2240
Hardness (at 200°F, 2 hr)92-Shore D
Hardness (at 200°F, 8 hr)92-ASTM DI 2240
Hardness (at 200°F, 8 hr)92-Shore D
Hardness (1 hr at 140°F + 16 hr at 160°F)92-ASTM DI 2240
Hardness (1 hr at 140°F + 16 hr at 160°F)92-Shore D
Lap Shear Strength to Aluminium (at -65°F, Cured Condition : at 200°F, 2 hr)2100psiASTM D1002
Lap Shear Strength to Aluminium (at -65°F, Cured Condition : at 200°F, 8 hr)2400psiASTM D1002
Lap Shear Strength to Aluminium (at -65°F, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)2300psiASTM D1002
Lap Shear Strength to Aluminium (at 75°F, Cured Condition : at 200°F, 2 hr)2400psiASTM D1002
Lap Shear Strength to Aluminium (at 75°F, Cured Condition : at 200°F, 8 hr)2400psiASTM D1002
Lap Shear Strength to Aluminium (at 75°F, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)2400psiASTM D1002
Lap Shear Strength to Aluminium (at 200°F, Cured Condition : at 200°F, 2 hr)2400psi-
Lap Shear Strength to Aluminium (at 200°F, Cured Condition : at 200°F, 8 hr)2500psi-
Lap Shear Strength to Aluminium (at 200°F, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)2200psi-
Flexural Strength (at 200°F, 2 hr)12000psiASTM D790
Flexural Strength (at 200°F, 8 hr)11000psiASTM D790
Flexural Strength (1 hr at 140°F + 16 hr at 160°F)11000psiASTM D790
Young's Modulus in Flexure (at 200°F, 2 hr)1.6 x 10⁶psiASTM D790
Young's Modulus in Flexure (at 200°F, 8 hr)1.5 x 10⁶psiASTM D790
Young's Modulus in Flexure (1 hr at 140°F + 16 hr at 160°F)1.6 x 10⁶psiASTM D790
Glass Transition Temperature (at 200°F, 2 hr)186°FDifferential Scanning Calorimetry
Glass Transition Temperature (at 200°F, 2 hr)184°FThermal Mechanical Analysis
Glass Transition Temperature (at 200°F, 8 hr)221°FDifferential Scanning Calorimetry
Glass Transition Temperature (at 200°F, 8 hr)205°FThermal Mechanical Analysis
Glass Transition Temperature (1 hr at 140°F + 16 hr at 160°F)203°FDifferential Scanning Calorimetry
Glass Transition Temperature (1 hr at 140°F + 16 hr at 160°F)183°FThermal Mechanical Analysis
Coefficient of Linear Thermal Expansion (between -65°F and 80°F, Cured Condition : at 200°F, 2 hr)15 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between -65°F and 80°F, Cured Condition : at 200°F, 8 hr)15 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between -65°F and 80°F, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)15 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between 80°F and 135°F, Cured Condition : at 200°F, 2 hr)21 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between 80°F and 135°F, Cured Condition : at 200°F, 8 hr)21 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between 80°F and 135°F, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)20 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between 250°F and 300°F, Cured Condition : at 200°F, 2 hr)62 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between 250°F and 300°F, Cured Condition : at 200°F, 8 hr)64 x 10⁻ ⁶/ °FASTM D831-A
Coefficient of Linear Thermal Expansion (between 250°F and 300°F, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)64 x 10⁻ ⁶/ °FASTM D831-A
Weight Change (after 24 hr immersion in water, Cured Condition : at 200°F, 2 hr)-0.01%ASTM D590-A
Weight Change (after 24 hr immersion in water, Cured Condition : at 200°F, 8 hr)-0.01%ASTM D590-A
Weight Change (after 24 hr immersion in water, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)-0.01%ASTM D590-A
Weight Change (after 24 hr immersion in water + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.01%-
Weight Change (after 24 hr immersion in water + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)-0.01%-
Weight Change (after 24 hr immersion in water + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)-0.01%-
Weight Change (after 24 hr immersion in methanol + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.003%-
Weight Change (after 24 hr immersion in methanol + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0%-
Weight Change (after 24 hr immersion in methanol + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)0.008%-
Weight Change (after 24 hr immersion in toluene + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.002%-
Weight Change (after 24 hr immersion in toluene + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0.002%-
Weight Change (after 24 hr immersion in toluene + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)0%-
Weight Change (after 24 hr immersion in HCFC 141b + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.002%-
Weight Change (after 24 hr immersion in HCFC 141b + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0.002%-
Weight Change (after 24 hr immersion in HCFC 141b + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)0%-
Weight Change (after 24 hr immersion in acetone + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.015%-
Weight Change (after 24 hr immersion in acetone + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)-0.006%-
Weight Change (after 24 hr immersion in acetone + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)-0.008%-
Weight Change (after 24 hr immersion in n - hexane + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.01%-
Weight Change (after 24 hr immersion in n - hexane + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)-0.003%-
Weight Change (after 24 hr immersion in n - hexane + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)0.008%-
Weight Change (after 24 hr immersion in chloroform + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)0.127%-
Weight Change (after 24 hr immersion in chloroform + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0.007%-
Weight Change (after 24 hr immersion in chloroform + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 16 hr at 160°F)0.243%-
Linear Shrinkage upon Cure (at 200°F, 2 hr, Condition : at room temperature, apparent shrinkage, dimensions of speciemen : mold)0.2--
Dielectric Constant (at 77°F, at 1 kHz, Cured Condition : at 200°F, 2 hr)5.37--
Dielectric Constant (at 200°F, at 1 kHz, Cured Condition : at 200°F, 2 hr)5.69--
Dissipation factor (at 77°F, at 1 kHz, Cured Condition : at 200°F, 2 hr)0.004--
Dissipation factor (at 200°F, at 1 kHz, Cured Condition : at 200°F, 2 hr)0.007--
Volume Resistivity (at 77°F, Cured Condition : at 200°F, 2 hr)37 x 10¹⁴ohm-cm-
Volume Resistivity (at 200°F, Cured Condition : at 200°F, 2 hr)0.4 x 10¹⁴ohm-cm-
Storage Temperature85°F-
Recommended Mixing and Handling Parameters
ValueUnitsTest Method / Conditions
AdhesiveLCA-4--
ActivatorBA-5--
Activator required per hundred of adhesive (parts by weight)4.5--
Viscosity of Mixed Adhesive (at room temperature)5300poise-
Viscosity of Mixed Adhesive (at 160°F)130poise-
Work Life (at room temperature)60minutes-
Pot Life (at room temperature)100minutes-

Packaging & Availability

Regional Availability
  • Global
Packaging Information
  • Adhesive LCA-4-4/BA-5 and LCA-4/BA-9 are available in quart and four fluid once kits
  • Adhesive LCA-4/BA-9 is available in One-Stock kits

Storage & Handling

Shelf Life
min. 2 years
Storage Information

The shelf life of these materials are greater than two years when stored in unopened containers at an average temperature below 85°F.