PermaBond 268

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Description for PermaBond 268

Faster set times and improved gap-filling capability compared to conventional Cyanoacrylate.

Chemical Resistance	Dioctyl phthalate, Chemical Resistance: Solvent, Gasoline, Motor oil, Chemical resistance
Application Type	Bond, Adhesive: Instant Adhesives
1 Part or 2 Part	1-Part
Material Form	Liquid
Substrate	Aluminum , Ceramics, Passivated Metals, Difficult-to-bond plastics, Rubber, Steel , Polyacetals, Elastomers, Plastics
Manufacturer	PermaBond
Chemistry	Cyanoacrylate, Ethyl
Cure Method	Moisture
Cure Temperature (°C)	25
Cure Time (min)	1,440
Viscosity (cPs)	High, 1,200 to 2,400
Color	Colorless
High Temperature Resistance (°C)	82
Low Temperature Resistance (°C)	-54
Other Resistance	Thermal Resistance
Key Specifications	Mil-Spec (United States Military Standard): A-46050C: MIL-A-46050C Type II Class 3

Best Practices for PermaBond 268

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Technical Data for PermaBond 268

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Overview

Chemical Resistance
- Chemical Resistance - Dioctyl phthalate, Gasoline, Motor oil
- Chemical Resistance : Relative Solvent Resistance - Solvent
Application Type
- Adhesive - Bond
- Adhesive : Instant Adhesives
1 Part or 2 Part
- 1-Part
Material Form
- Liquid
Substrate
- Ceramic - Ceramics
- Metal - Passivated Metals
- Aluminum - Aluminum
- Steel - Steel
- Plastic - Difficult-to-bond plastics, Elastomers, Plastics
- Acetal - Polyacetals
- Rubber
Industry
- Industrial - Large gap fill
Chemistry
- Cyanoacrylate (CA) - Cyanoacrylate
- Other - Ethyl
Application Method
- Dispenser - Automatic dispensing equipment
Cure Method
- Moisture / Condensation Cure - Moisture
Color
- Clear / Transparent - Colorless
Key Specifications
- Mil-Spec (United States Military Standard) : A-46050C : Type II, Class 3 - MIL-A-46050C Type II Class 3

Specifications

Cure Specs

Cure Temperature (°C)	25
Cure Time (min)	1,440
Viscosity (cPs)	High, 1,200 to 2,400	Test Method
Fixture or Handling Strength Time (min)	0.08 to 0.17, 0.08 to 0.17, 0.08 to 0.17	Test Method
Set Time (min)	Instant, 0.17, 0.17, 0.17	Test Method

Bond Strength

Shear Strength (psi)	High, 2,900 to 3,200	Test Method
Impact Strength (psi)	3-5 (kJ/m²)	Test Method

Material Resistance

High Temperature Resistance (°C)	82
Low Temperature Resistance (°C)	-54
Other Resistance	Thermal Resistance

Conductivity

Dielectric Strength (V/mil)	250
Thermal Conductivity (W/m°K)	0.10

Hardness

Shore A Hardness	85	Test Method
Shore D Hardness	85	Test Method

Other Properties

Specific Gravity	1.100
Coefficient of Thermal Expansion (CTE)	90 x 10-6 (mm/mm/°C)
Flash Point (°F)	181.4

Business Information

Shelf Life Details	Shelf Life stored at 2°C – 7°C (35°F – 45°F), Cyanoacrylate adhesives are subject to an aging process and have a limited shelf life. When stored in the original unopened container in a refrigerator between 2°C and 7°C (35°F and 45°F), the shelf life is 12 months from the date of shipment from Permabond. It could be less when stored at ambient environment depending on conditions of temperature and humidity.
Shelf Life Temperature (°F)	36 to 45
Shelf Life Type	From the date of shipment
Shelf Life (mon)	12

Best Practices for PermaBond 268

*See Terms of Use Below
1. Surface Preparation
  
  Surfaces should be clean, dry and grease-free before applying the adhesive. Use a suitable solvent (such as acetone or isopropanol) for the degreasing of surfaces. Some metals such as aluminium, copper and its alloys will benefit from light abrasion with emery cloth (or similar), to remove the oxide layer.
2. Application
  
  Apply the adhesive sparingly to one surface.
  
  Bring the components together quickly and correctly aligned.
  
  Apply sufficient pressure to ensure the adhesive spreads into a thin film.
  
  Do not disturb or re-align until sufficient strength is achieved, normally in a few seconds.
  
  Any surplus adhesive can be removed with Permabond CA solvent, nitromethane or acetone.
3. Curing
  
  The cure rates of cyanoacrylates are dependent on the substrate used, gap, and relative humidity. Cyanoacrylate adhesives have limited gap-filling capability. The speed of cure and the ultimate strength might decrease as the gap increases. The cure speed of cyanoacrylates will depend on the ambient relative humidity
  
  the cure rate generally increases with increasing humidity. The cure rate of cyanoacrylates can be increase by applying activator QFS16. However, the application of the activator might decrease the ultimate strength of the bond.
4. Clean-Up
  
  When large quantities of cyanoacrylate adhesives are accidentally spilled, the area should be flooded with water that will cause the liquid cyanoacrylate to cure. The cured material can then be scraped from the surface. NOTE: The liquid adhesive should not be wiped up with rags or tissue. The fabric will cause polymerization and large quantities of adhesive will generate heat on cure, causing smoke and strong irritating vapors. ALWAYS FLOOD WITH EXCESS WATER TO CLEAN UP SPILL CONDITIONS.
Comparable Materials for PermaBond 268

*See Terms of Use Below

Spec Engine^® Results
- 170(PermaBond)
  Medium viscosity, maximum gap fill. Fast setting with rapid development of high strength.
- 798(PermaBond)
  Surface insensitive – cures rapidly on most surfaces, wide range of viscosities, fast setting, rapid cure.
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