FILCO® 74003 represents an epoxy resin available in non-ionic water dispersion, specifically utilized as a film former within glass fiber sizings. It manifests as a milky liquid. Noteworthy product characteristics include its purity as a pure epoxy resin, a narrow particle size distribution, along with properties such as hydrolysis and sedimentation stability, and high mechanical shear stability when the emulsion is diluted.

Functions: Film Former

Chemical Family: Epoxy & Epoxy Derivatives

Compatible Polymers & Resins: Unsaturated Polyester (UPE)

Processing Methods: Filament Winding, Pultrusion

Technical Data Sheet

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Identification & Functionality

Composite Materials Functions

Features & Benefits

Product Characteristics
  • Pure epoxy resin
  • Epoxy Eq. Wt. =290 g
  • Narrow particle size distribution
  • Hydrolysis and sedimentation stability from pH 2 to 12: min. 48 hours
  • High mechanical shear stability of the diluted emulsion
Characteristics of Film
  • Clear
  • Tacky
  • Very quickly soluble in styrene
  • Compatible with unsaturated polyesters and other thermosets

Applications & Uses

Compatible Polymers & Resins
Compatible Reinforcements
Composites Processing Methods
Processing Information

FILCO® 74003 is suggested as film former for glass fiber sizes for:

  • Filament winding roving
  • Pultrusion roving
  • Woven roving


Physical Form
Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (at 25°C, #3, 20 rpm)500 - 4000mPa.sMA143LFE
Solid Content49 - 53%MA145LFE
pH5 - 7.5-MA148LFE
Epoxy Equivalent Weight260 - 310g/eqMA149LFE
Particle Size Distribution
ValueUnitsTest Method / Conditions
Average Particle Size200 - 600nmMA147LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
6 months
Storage and Stability

FILCO® 74003 should be stored in closed containers away from direct sun rays, at temperature between +5 and +30°C. In these conditions maximum suggested storage time is 6 months from production, in the original package. After that date product must be rechecked. Prevent from Freezing.