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Description for 3M 1751 B/A
A gray, aluminum filled, two-part, room temperature curing structural adhesive. • Excellent void filler and machinable for many "Body Solder" applicationsChemical Resistance Hyd Oil, Chemical Resistance: Fluid Resistance: Tap Water, JP-4 Fuel, Salt Spray Application Type Bond, Repairing 1 Part or 2 Part 2-Part Material Form Liquid Substrate Aluminum, Copper, Glass, Metal, Plastic, Polyester, Rubber, Steel, Maple Manufacturer 3M Chemistry Epoxy, Epoxy: Modified Epoxy Cure Method Base/Accelerator Cure Temperature (°C) 20 to 25 Room Temperature, 24, 24, 67, 93 Cure Time (min) 10,080, 10,080, 120, 30 Viscosity (cPs) Void filling, 700,000 Color Gray High Temperature Resistance (°C) 149, 82 Low Temperature Resistance (°C) -55 -
Technical Data for 3M 1751 B/A
Overview
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Chemical Resistance
- Chemical Resistance : Fluid Resistance : Water Resistance - Tap Water
- Chemical Resistance - Hyd Oil, JP-4 Fuel, Salt Spray
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Application Type
- Adhesive - Bond
- Repair & Maintenance - Repairing
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1 Part or 2 Part
- 2-Part
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Material Form
- Liquid
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Cure Method
- 2-Part Cure - Base/Accelerator
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Color
- Gray
Specifications
Cure Specs
Cure Temperature (°C) 20 to 25 Room Temperature, 24, 24, 67, 93 Test Method Cure Time (min) 10,080, 10,080, 120, 30 Test Method Viscosity (cPs) Void filling, 700,000 Fixture or Handling Strength Time (min) 480 to 720 Test Method Work / Pot Time (min) Long, 45, 45 Test Method Mix Ratio 3:2 (by volume), 2:1 (by weight) Bond Strength
Structural/Load-Bearing Structural Peel Strength (piw) 4, 5 Test Method Shear Strength (psi) 1,400, 2,000, 500, 1,500, 2,400, 200, 2,160, 2,440, 2,245, 2,570, 690 Test Method Material Resistance
High Temperature Resistance (°C) 149, 82 Low Temperature Resistance (°C) -55 Conductivity
Filler Aluminum Thermal Conductivity (W/m°K) 0.39 Test Method Hardness
Shore D Hardness 75 to 80 Test Method Flexibility Rigid Business Information
Shelf Life Details Store products at 60-80°F (15-27°C) for maximum storage life.;Rotate stock on a “first in-first out” basis. 3M™ Scotch-Weld™ Epoxy Adhesive 1751 B/A has a storage life of two years in unopened containers. Shelf Life Temperature (°F) 61 to 81 Shelf Life (mon) 24 -
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Best Practices for 3M 1751 B/A
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Surface Preparation
For high strength structural bonds, paint, oxide films, oils, dust, mold release agents and all other surface contaminants must be completely removed. The amount of surface preparation depends on the required bond strength and the environmental aging resistance desired by user.
See Vendor Technical Data sheet for more information.
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Application
Use gloves to minimize skin contact with adhesive.
Application to the substrates should be made within 45 minutes. Large quantities and/or higher temperatures will reduce this working time.
Join the adhesive coated surfaces and allow to cure at 60°F (16°C) or above until firm. Up to 200°F (93°C), will speed curing.
Keep parts from moving until handling strength is reached. Contact pressure is necessary. Maximum shear strength is obtained with a 3-5 mil bond line.
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Mixing
This product consists of two parts. Mix thoroughly by weight or volume in the proportions specified in the Uncured Properties Section. Mix approximately 15 seconds after a uniform color is obtained.
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Clean-Up
Excess uncured adhesive can be cleaned up with ketone type solvents.*
*Note: When using solvents, extinguish all ignition sources and follow manufacturer’s precautions and directions for use.
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Cure Temperature Test Methods
| Cure Temperature | Cure Time Test Method |
|---|---|
| 20 to 25°C Room Temperature | |
| 24°C | |
| 24°C | |
| 67°C | |
| 93°C |
Cure Time Test Methods
| Cure Time | Test Method |
|---|---|
| 10,080 min | |
| 10,080 min | |
| 120 min | |
| 30 min |
Fixture or Handling Strength Time Test Methods
| Fixture or Handling Strength Time | Fixture-Handling Strength Time Temperature |
|---|---|
| 480 to 720 min | 24°C |
Work / Pot Time Test Methods
| Work / Pot Time | Test Method | Temperature |
|---|---|---|
| Long | ||
| 45 min | Part A, 100 gram Qty.@ 75°F 24°C Approx. Time | 24°C |
| 45 min | Part B, 100 gram Qty.@ 75°F 24°C Approx. Time | 24°C |
Peel Strength Test Methods
| Peel Strength | Type | Substrate | Test Temperature | Test Method |
|---|---|---|---|---|
| 4 piw | T-Peel strength | Aluminum | 24°C | ASTM D-1876-61T |
| 5 piw | T-Peel Strength | Steel | 24°C | ASTM D-1876-61T |
Shear Strength Test Methods
| Shear Strength | Type | Substrate | Test Temperature | Test Method |
|---|---|---|---|---|
| 1,400 psi | Overlap shear strength | Aluminum | -55°C | ASTM D-1002-72 |
| 2,000 psi | Overlap shear strength | Aluminum | 24°C | ASTM D-1002-72 |
| 500 psi | Overlap shear strength | Aluminum | 82°C | ASTM D-1002-72 |
| 1,500 psi | Overlap shear strength | Steel | -55°C | ASTM D-1002-72 |
| 2,400 psi | Overlap shear strength | Steel | 24°C | ASTM D-1002-72 |
| 200 psi | Overlap shear strength | Steel | 82°C | ASTM D-1002-72 |
| 2,160 psi | Overlap shear strength | Steel to Aluminum | ||
| 2,440 psi | Overlap shear strength | Steel to Steel | ||
| 2,245 psi | Overlap shear strength | Steel to Copper | ||
| 2,570 psi | Overlap shear strength | Aluminum to Copper | ||
| 690 psi | Overlap shear strength | Maple to Polyester |
Thermal Conductivity Test Methods
| Thermal Conductivity | Temperature |
|---|---|
| 0.39 W/m°K | 36°C |
Shore D Hardness Test Methods
| Shore D Hardness | Shore Hardness Test Method |
|---|---|
| 75 to 80 | ASTM D-2240 |
