LORD 661/6

Harmonization Code : 38159000 | Unspecified reaction initiators, accelerators, and catalytic preparations

LORD 661/6

Main features

  • Up to 25.4 mm Gap Fill
  • 11-19 Minute Working Window at 32 deg C
  • 45-55 Minute Handling Strength

Product Description

LORD 661/Accelerator 6 is a two-part acrylic adhesive system for DCPD and modified-DCPD FRP and for cross-bonding those composites to metals. LORD 661 is a white to off-white paste with blue tint and typical viscosity of 125,000-350,000 cP. The system mixes 10:1 by volume or 7.4:1 by weight. At 32 deg C, LORD 661 has an 11-19 minute working time; handling strength is reached in 45-55 minutes, with 24-hour room-temperature cure. The mixed adhesive is non-sag and fills gaps up to 25.4 mm. This page refers specifically to Accelerator 6, not the separate 6GB variant.

Key features

  • Gap-Filling Capacity: The mixed system fills gaps up to 25.4 mm.
  • Mixed-System Work Time: LORD 661 mixed with Accelerator 6 has a typical working time of 11 to 19 minutes at 32 deg C.
  • Assembly Handling: The LORD 661 system reaches the stated handling-strength endpoint in 45 to 55 minutes.

Applications

DCPD and modified-DCPD FRP bonding and cross-bonding composites to metals.

Product Family

LORD 661/6

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
White/Off-white/Blue Tint Paste
Density
Volumetric mass per unit
1055 -1174 kg/m3
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
10:1
Solids
100 %
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
125,000 - 350,000 mPa.s
Thermal Properties
Flash Point
The flashpoint of a solvent is the lowest possible temperature at which it can vaporize to form an ignitable vapor. Flashpoint is often confused with “autoignition temperature”, which is the temperature at which a solvent ignites without an ignition source.
15 °C

Additional Information

Technical properties

As-supplied / before-processing properties

LORD 661 values and mixed-system values apply specifically to the LORD 661/Accelerator 6 system, not Accelerator 6GB.

PropertyValueUnitMethod / condition
LORD 661 viscosity125,000-350,000cPTypical
LORD 661 density1,055-1,174kg/m3Typical
Flash point15deg CTypical; LORD 661 component
Mix ratio10:1by volumeLORD 661 adhesive to Accelerator 6
Mix ratio7.4:1by weightLORD 661 adhesive to Accelerator 6
Solids content100%Typical; mixed system
Working time11-19minutesTypical; 1 in diameter bead at 32 deg C
Time to handling strength45-55minutesTypical; 100 psi lap-shear endpoint, 30 mil x 1 in x 1 in

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