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BUP 640 is an un-promoted orthophthalic based unsaturated polyester resin with very low color, high solid and viscosity, good flexibility, transparency and mechanical properties for ambient temperature cure with MEK peroxide.

Polymer Name: Thermoset Polyester

Chemical Family: Orthophthalics, Polyesters, Unsaturated Polyester (UPE)

Cure Method: Heat Cure

Density: 1170.0 - 1170.0 kg/m³

Technical Data Sheet
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Identification & Functionality

Composite Materials Functions

Features & Benefits

Characteristics and Advantages
  • Very low color
  • High solid and viscosity
  • Good flexibility and transparency
  • Good mechanical properties

Applications & Uses

Cure Method
Uses
  • Manufacturing buttons
  • Manufacturing embedded parts
  • Highly transparent castings

Properties

Appearance
Clear
Typical Properties
ValueUnitsTest Method / Conditions
Water absorptionMax 0.3wt%ISO 62
Acid numberMax 25mg KOH/gASTM D1639
ColorMax 0.3GardnerASTM D1544
Curing time20-8minASTM D2471
Density (at 23°C)1.1678g/cm³ASTM D1475
Flash point (open cup)22°CASTM D92
Flexural modulus1650MPaISO 178
Flexural strengthMin 90MPaISO 178
Gel Time44420minASTM D2471
Hardness (Barcol)min. 35ASTM D2583
Heat distortion temperature (HDT)Min 55°CASTM D648
Linear shrinkage (ΔL/L)Max 1%ASTM D2566
Peak exothermic temperatureMax 170°CASTM D2471
Solid content71±2wt%ASTM D1259
Tensile elongation3.41%ISO 527-2
Tensile modulus440MPaISO 527-2
Tensile strengthMin 45MPaISO 527-2
Viscosity (at 25°C)1200-1700mPa.s (cP)ISO 2555

Safety & Health

Product safety and Environmental protection

The usual protective measures employed during the handling of Unsaturated Polyester Resins should be observed. Further product safety information can be obtained from our Material Safety Data Sheet which is available on request.

Storage & Handling

Storage

225 kg (net) in steel drums

Storage

Store in a cool place below 25 °C and away from moisture and direct sunlight. Under above mentioned storage conditions, the shelf life of the resin will be at least 1 month ex-works.