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BUP 621

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BUP 621

Unsaturated Polyester Resin

Orthophthalic Polyester Resin

Product Description:

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.

Characteristics and Advantages:

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

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

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 1

ASTM D1544

Viscosity (at 25°C)

mPa.s (cP)

380-480

ISO 2555

Density (at 23°C)

g/cm³

1.1293

ASTM D1475

Acid number

mg KOH/g

Max 26

ASTM D1639

Solid content

wt %

62±2

ASTM D1259

Gel time*

min

6-25

ASTM D2471

Curing time

min

8-16

ASTM D2471

Peak exothermic temperature

℃

Max 190

ASTM D2471

Water absorption

wt %

Max 0.3

ISO 62

Flash point (open cup)

℃

22

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 60

ISO 527-2

Tensile elongation

%

8.86

ISO 527-2

Tensile modulus

MPa

639

ISO 527-2

Flexural strength

MPa

Min 115

ISO 178

Flexural modulus

MPa

2384

ISO 178

Heat distortion temperature (HDT)

°C

Min 60

ASTM D648

Hardness (Barcol)

NA

Min 40

ASTM D2583

Linear shrinkage (∆L/L)

%

Max 1.3

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.