LOCTITE ECCOBOND FP4650
Harmonization Code : 3907.30.00.85 | Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms : Epoxide resins : Other
Main features
- Excellent chemical resistance
- Low thermal expansion
- High purity
Product Description
LOCTITE ECCOBOND FP4650 epoxy encapsulant features very low thermal expansion while retaining syringe dispense capabilities. It is a heat curable fill encapsulant with high purity and a filler content of 83%. The maximum filler size is 120um while the average filler size is 10um. For fine wire pitch applications you can also look into FP4651 with much lower particle filler size.
Recommended Cure Schedule
- 1 hour @ 120°C plus 2 hours @ 160°C
- 3 hours @ 170°C
ECCOBOND FP4650
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TDS, SDS & Technical Documents
Technical Specifications
General Properties
Pot Life
192 hours
Pot life is the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed.
It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.
Specific Gravity
1.91
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
Thermal Properties
Glass Transition Temperature (Tg)
140 °C
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding.
The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
Physical Properties
Viscosity
325,000 mPa.s
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
