BUP 645
Unsaturated Polyester Resin
Orthophthalic Polyester Resin
Product Description:
BUP 645 is an un-promoted orthophthalic based unsaturated polyester resin with very low color, medium viscosity and good mechanical properties for ambient temperature cure with MEK peroxide.
Characteristics and Advantages:
Uses:
Technical Properties:
Physical data in liquid state at 25°C
These data are measured for each lot by our QC lab before its release.
Properties
Unit
Value
Test method
Appearance
NA
Clear
NA
Color
Gardner
Max 0.3
ASTM D1544
Viscosity (at 25°C)
mPa.s (cP)
400-500
ISO 2555
Density (at 23°C)
g/cm³
1.1446
ASTM D1475
Acid number
mg KOH/g
Max 26
ASTM D1639
Solid content
wt %
64±2
ASTM D1259
Gel time*
min
8-15
ASTM D2471
Curing time
min
8-13
ASTM D2471
Peak exothermic temperature
℃
Max 190
ASTM D2471
Water absorption
wt %
Max 0.25
ISO 62
Flash point (open cup)
℃
21
ASTM D92
* Promoter: 0.5 g Cobalt (1%) in 100 g resin @25 °C
Initiator: 2 g MEKP (50%) in 100 g resin
Typical non-reinforced casting properties
These data are not subject to routine monitoring or part of the specifications; they are only reported for a better product description.
Properties
Unit
Value
Test method
Tensile strength
MPa
Min 40
ISO 527-2
Tensile elongation
%
9.2
ISO 527-2
Tensile modulus
MPa
415
ISO 527-2
Flexural strength
MPa
Min 70
ISO 178
Flexural modulus
MPa
1410
ISO 178
Heat distortion temperature (HDT)
°C
Min 55
ASTM D648
Hardness (Barcol)
NA
Min 30
ASTM D2583
Linear shrinkage (∆L/L)
%
Max 1.1
ASTM D2566
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: 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 6 months ex-works.
Disclaimer: The information and in particular the recommendations relating to the application and use of Bonyan Kala Chemie products are given in good faith based on our current knowledge and expertise of the products when properly stored, handled and used under normal conditions within their shelf life. In practice, the differences in materials, chemistries and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any recommendations, or from any other advice offered. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users should always refer to the most recent issue of the Technical Data Sheet for the product concerned, copies of which will be supplied on request or can be accessed from www.bonyankala.com.
