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espol™ 26.00 is a non-accelerated orthophthalic polyester resin that rapidly wets out reinforcements. It is formulated as a pultrusion grade, providing fast line speeds for products requiring high temperature exposure and a good finish. It can be used with all types of glass fibers, such as chopped strand mat, woven roving, and multi-axials. Typical applications include channels, angles, ladders, and special panels for appliances.

Polymer Name: Polyester (unspecified)

Reinforcement Material: Glass Fibers

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

Processing Methods: Casting, Continuous Lamination, Hand Lay-up, Pultrusion, Spray Lay-up

End Uses: Angles, Channels, Home Appliances, Ladders

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Reinforcement Material
Composite Materials Functions

Features & Benefits

Applications & Uses

Compatible Reinforcements
Applications

espol™ 26.00 should be stored between 5°C and 25°C in the original, unopened container in a dry, well ventilated place. Protect from freezing and direct sunlight. Avoid contact with oxidizing agents. If stored outside of these recommendations, shelf life will be significantly reduced.

Formulation Guidelines
  • espol™ 26.00 should be allowed to attain workshop temperature (25°C - 30°C) before use. Stir well by hand, or with a low shear mixer to avoid aeration, and then allow to stand to regain thixotropy. espol™ 26.00 requires only the addition of catalyst to start the curing reaction in elevated temperature cure processes.
  • The recommended elevated temperature curing catalyst is TBPB which should be added to the resin at 1 - 2% and thoroughly incorporated into the resin, using a low shear mechanical stirrer where possible.

Properties

Color
Physical Form
Appearance
Light pale yellow clear viscous liquid
Cured Properties
ValueUnitsTest Method / Conditions
Barcol Hardness40IS 6746-1994 (Reaffirmed 2005)
Deflection Temperature under Load (1.80MPa)*75ºCIS 6746-1994 (Reaffirmed 2005)
Tensile Strength*50 - 60MPaIS 6746-1994 (Reaffirmed 2005)
Tensile Modulus*3000 - 3200MPaIS 6746-1994 (Reaffirmed 2005)
Elongation at Break*1.5 - 2.5%IS 6746-1994 (Reaffirmed 2005)
Flexural Strength*80 - 100MPaIS 6746-1994 (Reaffirmed 2005)
Flexural Modulus*3050 - 3400MPaIS 6746-1994 (Reaffirmed 2005)
Uncured Properties
ValueUnitsTest Method / Conditions
Specific Gravity1.11 - 1.15IS 6746-1994 (Reaffirmed 2005)
Viscosity (at 25°C)****650 - 850cPIS 6746-1994 (Reaffirmed 2005)
Acid Value22 - 28mg KOH/gIS 6746-1994 (Reaffirmed 2005)
Volatile Content30 - 36%IS 6746-1994 (Reaffirmed 2005)
Gel Time (at 25°C)**15 - 25minIS 6746-1994 (Reaffirmed 2005)
Gel Time (at 140°C)***1.3 - 3minIS 6746-1994 (Reaffirmed 2005), SPI
Peak Exotherm Temperature**220 - 280ºCIS 6746-1994 (Reaffirmed 2005)
Note
  • *Curing Schedule - 24 hours at 20°C, 6 hours at 80°C.
  • **100g resin + 1 ml Cobalt 2%+ 1.5ml MEKP (50%) Catalyst.
  • ***SPI test 1.3ml TBPB Catalyst.
  • ****Viscosity measured using Brookfield (RVT Model) Viscosity SPL 1 / SPD 10

Technical Details & Test Data

Post Curing

Satisfactory laminates for many applications can be made from espol™ 26.00 by curing at workshop temperature (25°C). For optimum properties, however, laminates should be post-cured before being put into service. The laminate should be allowed to cure for 24 hours at 25°C, and then be oven cured for a minimum of 6 hours 80°C.

Packaging & Availability

Packaging Type
Packaging Information

espol™ 26.00 is available in 35kg, 220kg and bulk containers.

Storage & Handling

Shelf Life
3 Months
Storage Conditions

espol™ 26.00 should be stored between 5°C and 25°C in the original, unopened container in a dry, well ventilated place. Protect from freezing and direct sunlight. Avoid contact with oxidising agents. If stored outside of these recommendations, shelf life will be significantly reduced.