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BUP 621 is an un-promoted orthophthalic based unsaturated polyester resin with low color, medium viscosity and very good mechanical properties for ambient temperature cure with MEK peroxide.

Chemical Family: Polyesters

Compatible Substrates & Surfaces: Glass

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
CASE Ingredients Functions
Technologies

Features & Benefits

Characteristics and Advantages
  • Low color
  • Medium viscosity
  • Excellent adhesion to glass fibers
  • Very good mechanical properties
  • Outstanding filler binding power

Applications & Uses

Compatible Substrates & Surfaces
Uses
  • Casting decorative parts and accessories
  • Manufacturing embedded parts
  • Highly transparent castings
  • Hand lay-up
  • Urban furniture fabrication
  • Aqua park equipment fabrication
  • Playing Ground Equipment fabrication
  • Solid surface
  • Artificial stone

Properties

Appearance
clear
Typical Properties
ValueUnitsTest Method / Conditions
Water absorptionMax 0.3wt%ISO 62
Acid numberMax 26mg KOH/gASTM D1639
ColorMax 1GardnerASTM D1544
Curing time44389minASTM D2471
Density (at 23°C)1.1293g/cm³ASTM D1475
Flash point (open cup)22°CASTM D92
Flexural modulus2384MPaISO 178
Flexural strengthMin 115MPaISO 178
Gel Time25-6minASTM D2471
Hardness (Barcol)min. 40ASTM D2583
Heat distortion temperature (HDT)Min 60°CASTM D648
Linear shrinkage (ΔL/L)Max 1.3%ASTM D2566
Peak exothermic temperatureMax 190°CASTM D2471
Solid content62±2wt%ASTM D1259
Tensile elongation8.86%ISO 527-2
Tensile modulus639MPaISO 527-2
Tensile strengthMin 60MPaISO 527-2
Viscosity (at 25°C)380-480mPa.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.

Packaging & Availability

Packaging

225 kg (net) in steel drums

Storage & Handling

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 6 months ex-works.