FILCO® 662 is a bisphenolic, unsaturated polyester resin in powder form, boasts a very high molecular weight, ensuring exceptional performance in various applications. Rapid solubility in styrene facilitates swift integration into composite systems, and its outstanding binding power for glass fibers, particularly in "hot melt" conditions, makes it a key player in composite material production. The resin also exhibits a high degree of compatibility with unsaturated polyester matrices, underscoring its versatility and seamless integration within composite systems, making FILCO 662 a reliable choice for a range of manufacturing processes.

Functions: Resins, Binders & Matrix Materials

Chemical Family: Bisphenols, Polyesters

Compatible Polymers & Resins: Unsaturated Polyester (UPE)

Technical Data Sheet

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Enhanced TDS

Identification & Functionality

Features & Benefits

Materials Features
Product Highlights

FILCO® 662 is a bisphenolic, unsaturated polyester resin in powder form

  • Very high molecular weight
  • Very quickly soluble in styrene
  • Very high binding power for glass fibers in "hot melt" operating conditions
  • High degree of compatibility with unsaturated polyester matrices.

Applications & Uses

Compatible Polymers & Resins

FILCO® 662 main application

  • Styrene soluble binder for chopped strand mat and continous filament mat
  • Binder for preform.
Processing Information

2.5 - 5% of FILCO® 662 on the glass weight is normally required according to the weight for square meter and stiffness wanted for glass mat. Water as fine mist is sprayed to help FILCO® 662 to stick to glass fibers. After application of FILCO® 662 the glass mat is stoved at 180 - 210 °C for 1 - 2 minutes. The operation lets water evaporate and melt FILCO® 662, which accumulates at the contact points of the glass strands, binding them.


Light yellow, free flowing powder
Typical Properties
ValueUnitsTest Method / Conditions
Acid Number10 - 20mg KOH/gMA018LCP
Melt Index (at 125°C)23 - 35g/10 minutesMA109RPL

Packaging & Availability

Packaging Type
Regional Availability
  • Canada
  • Mexico
  • USA
Packaging Information

FILCO® 662 is supplied in 125 kg fiber drums with polyethylene bag

Storage & Handling

Storage Conditions

FILCO® 662 should be stored in the original package, at temperatures below 30° C, away from direct sun rays and source of heat.