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Unsaturated Polyester Resin

BUP 690 is a pre-promoted (amine-accelerated) orthophthalic based unsaturated polyester resin with low viscosity 

•Low viscosity

•Very good mechanical properties

•Outstanding filler binding power

Technical Properties:


Property
Unit
ValueTest method

Appearance

Color

Viscosity (at 25°C)

Density (at 23°C)

Acid number

Solid content

Gel time

Curing time

Peak exothermic temperature

Water absorption

Flash point (open cup)

NA

Gardner

mPa.s (cP)

g/cm³

mg KOH/g

wt%

min

min

°C

wt%

°C

Clear, Greenish

NA

300-450

1.1227

Max 26

63±2

4-9

4-8

Max 210

Max 0.3

20

NA

ASTM D1544

ISO 2555

ASTM D1475

ASTM D1639

ASTM D1259

ASTM D2471

ASTM D2471

ASTM D2471

ISO 62

ASTM D92

* Promoter: 0.5 g Cobalt (1%) in 100 g resin @25 °C

    Initiator: 2 g MEKP (50%) in 100 g resin