FILCO® 661 MF functions as a binder and boasts good mechanical properties along with resistance to hydrolysis. Tailored for use in composites, particularly in lamination applications, it exists in powder form, offering the necessary properties for applications where durability and resistance to moisture degradation are crucial.

Functions: Resins, Binders & Matrix Materials

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Identification & Functionality

Composite Materials Functions

Features & Benefits

Applications & Uses

Composites End Use


Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Melt Index18g/10 minutesMA109RPL
Glass Transition Temperature (Tg)115°F-
Particle Size Distribution
ValueUnitsTest Method / Conditions
Particle Size (>500 μm)0%MA123LFE
Particle Size (>425 μm)max. 0.5%MA123LFE
Particle Size (>250 μm)6%MA123LFE
Particle Size (>180 μm)28%MA123LFE
Particle Size (>125 μm)32%MA123LFE
Particle Size (>75 μm)23%MA123LFE
Particle Size (>45 μm)9%MA123LFE
Particle Size (Passing Through)4%MA123LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA