FILCO® 9663 is an unsaturated polyester resin that comes in powdered form, presenting as a light yellow, free-flowing powder. Notably, it boasts a very high molecular weight and demonstrates rapid solubility in styrene. It exhibits robust binding strength, especially in 'hot melt' operating conditions, and showcases excellent compatibility with unsaturated polyester matrices.

Polymer Name: Thermoset Polyester

Chemical Family: Bisphenols, Polyesters

Technical Data Sheet

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Enhanced TDS

Identification & Functionality

Chemical Family
Composite Materials Functions

Features & Benefits

  • Very high molecular weight
  • Very quickly soluble in stirene
  • High binding power for glass fibers in "hot melt" operating conditions
  • Softening point aroung 105°C

Applications & Uses

Compatible Polymers & Resins


Physical Form
Light yellow, free flowing powder
Typical Properties
ValueUnitsTest Method / Conditions
Acid Numbermax. 15mg KOH/gMA018LCP
Melt Index (at 125°C)10g/10 minutesMA109RPL

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
24 months
Storage and Shelf Life Conditions

FILCO® 9663 should be stored in closed containers away from direct sun rays, at temperature below +30°C. In these conditions maximum suggested storage time is 24 months from production, in the original package. After that date product must be rechecked.