LCA-9 is a filled gyro grade adhesive having an exceptionally low coefficient of thermal expansion. It exhibits excellent adhesion to aluminum and beryllium and has good chemical resistance.

RTU Product Type: Epoxy Adhesive

Application Area: Avionic Components, Gyros, Gyroscopes

Compatible Substrates & Surfaces: Aluminum, Metal

Features: Chemical Resistant, Good Adhesion, Low Coefficient of Thermal Expansion

Technical Data Sheet
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Identification & Functionality

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Usage Instructions

Mix, at room temperature, 100 parts by weight of Adhesive LCA-9 with 4.50 parts by weight of Activator BA-5. Mix well until homogenous. Cure as recommended.

NOTE:

  • Stir well the contents of the Adhesive LCA-9 container before use. If the contents contain crystals or are lumpy, warm to 200°F and mix thoroughly until homogenous before removing material. Prolonged storage at room temperature or low temperatures may cause the resin to solidify. Warming to 200°F will melt the resin and restore the adhesive to its original consistency.
  • Before mixing, BE SURE that both the adhesive LCA-9 and activator BA-5 are at room temperatures.
  • Weigh ingredients accurately so that each amount specified does not vary by more than 5%.
  • Activator BA-9 (BA-5 without color and thickener) may be used at a ratio of 4.2 parts of BA-9 to each 100 parts of adhesive. The cured properties are the same but the color of the cured adhesive is tan.

 

Properties

Physical Form
Cured Properties
ValueUnitsTest Method / Conditions
Specific Gravity (at 200°F, 2 hr)1.72-ASTM D792-A
Specific Gravity (at 200°F, 8 hr)1.72-ASTM D792-A
Specific Gravity (1 hr at 140°F + 24 hr at 160°F)1.72-ASTM D792-A
Hardness (at 200°F, 2 hr)93-ASTM DI 2240
Hardness (at 200°F, 2 hr)93-Shore D
Hardness (at 200°F, 8 hr)93-ASTM DI 2240
Hardness (at 200°F, 8 hr)93-Shore D
Hardness (1 hr at 140°F + 24 hr at 160°F)93-ASTM DI 2240
Hardness (1 hr at 140°F + 24 hr at 160°F)93-Shore D
Lap Shear Strength to Aluminium (at -65°F, Cured Condition : at 200°F, 2 hr)2900psiASTM D1002
Lap Shear Strength to Aluminium (at -65°F, Cured Condition : at 200°F, 8 hr)2700psiASTM D1002
Lap Shear Strength to Aluminium (at -65°F, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)2200psiASTM D1002
Lap Shear Strength to Aluminium (at 75°F, Cured Condition : at 200°F, 2 hr)2200psiASTM D1002
Lap Shear Strength to Aluminium (at 75°F, Cured Condition : at 200°F, 8 hr)2200psiASTM D1002
Lap Shear Strength to Aluminium (at 75°F, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)2800psiASTM D1002
Lap Shear Strength to Aluminium (at 200°F, Cured Condition : at 200°F, 2 hr)1700psi-
Lap Shear Strength to Aluminium (at 200°F, Cured Condition : at 200°F, 8 hr)1800psi-
Lap Shear Strength to Aluminium (at 200°F, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)2900psi-
Bond Strengthh to Aluminium (at 77°F after 6 months at 300°F, Cured Condition : at 200°F, 2 hr)2200psiASTM D1002
Flexural Strength (at 200°F, 2 hr)16000psiASTM D790
Flexural Strength (at 200°F, 8 hr)18000psiASTM D790
Flexural Strength (1 hr at 140°F + 24 hr at 160°F)13000psiASTM D790
Young's Modulus in Flexure (at 200°F, 2 hr)1.91 x 10⁶psiASTM D790
Young's Modulus in Flexure (at 200°F, 8 hr)1.70 x 10⁶psiASTM D790
Young's Modulus in Flexure (1 hr at 140°F + 24 hr at 160°F)1.40 x 10⁶psiASTM D790
Glass Transition Temperature (at 200°F, 2 hr)183°FDifferential Scanning Calorimetry
Glass Transition Temperature (at 200°F, 2 hr)162°FThermal Mechanical Analysis
Glass Transition Temperature (at 200°F, 8 hr)216°FDifferential Scanning Calorimetry
Glass Transition Temperature (at 200°F, 8 hr)219°FThermal Mechanical Analysis
Glass Transition Temperature (1 hr at 140°F + 24 hr at 160°F)200°FDifferential Scanning Calorimetry
Glass Transition Temperature (1 hr at 140°F + 24 hr at 160°F)192°FThermal Mechanical Analysis
Loss in Weight (after ageing six months at 300°F, Cured Cndition : at 200°F, 2 hr)0.6%-
Coefficient of Linear Thermal Expansion (between -185°F and -65°F, Cured Condition : at 200°F, 2 hr)11.5 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between -185°F and -65°F, Cured Condition : at 200°F, 8 hr)9.5 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between -185°F and -65°F, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)10.0 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between -65°F and 80°F, Cured Condition : at 200°F, 2 hr)11.5 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between -65°F and 80°F, Cured Condition : at 200°F, 8 hr)12.0 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between -65°F and 80°F, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)12.0 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between 85°F and 135°F, Cured Condition : at 200°F, 2 hr)18.0 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between 85°F and 135°F, Cured Condition : at 200°F, 8 hr)14.5 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between 85°F and 135°F, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)14.5 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between 250°F and 300°F, Cured Condition : at 200°F, 2 hr)54.0 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between 250°F and 300°F, Cured Condition : at 200°F, 8 hr)54.0 x 10⁻ ⁶/ °FASTM E831
Coefficient of Linear Thermal Expansion (between 250°F and 300°F, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)54.0 x 10⁻ ⁶/ °FASTM E831
Weight Change (after 24 hr immersion in water, Cured Condition : at 200°F, 2 hr)0.04%ASTM D570-A
Weight Change (after 24 hr immersion in water, Cured Condition : at 200°F, 8 hr)0.05%ASTM D570-A
Weight Change (after 24 hr immersion in water, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)0.04%ASTM D570-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 + 24 hr at 160°F)0%-
Weight Change (after 24 hr immersion in methanol + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.002%-
Weight Change (after 24 hr immersion in methanol + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)-0.013%-
Weight Change (after 24 hr immersion in methanol + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)-0.01%-
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)-0.013%-
Weight Change (after 24 hr immersion in toluene + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)-0.005%-
Weight Change (after 24 hr immersion in methylene chloride + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)1.17%-
Weight Change (after 24 hr immersion in methylene chloride + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0.006%-
Weight Change (after 24 hr immersion in methylene chloride + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)0.179%-
Weight Change (after 24 hr immersion in acetone + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.007%-
Weight Change (after 24 hr immersion in acetone + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)-0.005%-
Weight Change (after 24 hr immersion in acetone + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)-0.008%-
Weight Change (after 24 hr immersion in CFC 113 + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)0.002%-
Weight Change (after 24 hr immersion in CFC 113 + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0.001%-
Weight Change (after 24 hr immersion in CFC 113 + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)-0.003%-
Weight Change (after 24 hr immersion in n - hexane + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)-0.002%-
Weight Change (after 24 hr immersion in n - hexane + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0.002%-
Weight Change (after 24 hr immersion in n - hexane + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)-0.002%-
Weight Change (after 24 hr immersion in chloroform + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 2 hr)0.158%-
Weight Change (after 24 hr immersion in chloroform + drying at 120°F for 24 hrs, Cured Condition : at 200°F, 8 hr)0%-
Weight Change (after 24 hr immersion in chloroform + drying at 120°F for 24 hrs, Cured Condition : 1 hr at 140°F + 24 hr at 160°F)0.008%-
Storage Temperature85°F-
Recommended Mixing and Handling Parameters
ValueUnitsTest Method / Conditions
AdhesiveLCA-9--
ActivatorBA-5--
Activator required per hundred of adhesive (parts by weight)4.5--
Viscosity of Mixed Adhesive (at 160°F)50poise-
Work Life (at room temperature)90minutes-
Pot Life (at room temperature)180minutes-

Packaging & Availability

Regional Availability
  • Global
Availability Information
  • LCA-9/BA-5 and LCA-9/BA-9 are available in quart and four fluid ounce kits
  • LCA-9/BA-9 is available in One-Shot kits.
  • These systems are available also in Freeze-Paks.

Storage & Handling

Shelf Life
min. 2 years
Shelf Life Information

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