Crystic® Polyester Resin 272E

1 of 176 products in this brand
Crystic® Polyester Resin 272E is an isophthalic polyester resin designed for use in hot climates. It is used in high-performance applications such as pipes, tanks, and ducting. This versatile resin is suitable for use in filament winding, pultrusion, centrifugal molding, or contact molding processes. It has a 25-minute gel time.

Polymer Name: Thermoset Polyester

Functions: Resins, Binders & Matrix Materials, Surface Finish

Chemical Family: Isophthalics, Polyesters

Color: Yellow

Processing Methods: Centrifugal Casting, Filament Winding, Hand Lay-up, Pultrusion

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Features and Benefits

The excellent storage stability of Crystic 272E facilitates its transportation to hot climates, and its handling characteristics are suited to use in ambient temperatures up to 35°C. Crystic 272E has outstanding wetting characteristics with a range of reinforcements and is particularly suitable for use with continuous rovings, carbon fibers and aramid fibers. Fully cured moldings made with Crystic 272E have high mechanical strength and excellent strength retention in wet environments at temperatures up to 60°C.

Chemical Resistance

A useful guide to the chemical resistance of Crystic 272E laminates in over 200 chemical environments can be obtained by referring to Crystic 272 in the current edition of Technical Leaflet 145.3 - Safe Chemical Containment.

Applications & Uses

Markets
Composites End Use
Recommended Applications

Crystic 272E was developed for high performance applications such as pipes, tanks and ducting. It is a versatile resin suitable for use in filament winding, pultrusion, centrifugal molding or contact molding processes.

Formulation Guidelines

Crystic 272E can be used in hot, heat assisted and cold curing formulations by using the following recommended catalyst systems.

  • Catalyst Powder B (or Lucidol CHSO) for hot curing
  • Catalyst Powder B (or Lucidol CHSO) and Cumene Hydroperoxide (80%) for heat assisted curing
  • Catalyst M (or Butanox M50) or Catalyst O (or Interox SA3) for cold curing
Pot life

The amount of Accelerator E can be approximately determined from the table below.

Parts of Accelerator E to 100 Parts Resin. Catalyzed with 2% Catalyst M 1.0 2.0 3.0 4.0
Pot life in Minutes at 20°C 48 34 27 22
Pot life in Minutes at 25°C 36 25 21 18
Pot life in Minutes at 30°C 24 20 17 15

The resin and the workshop should be at, or above, 20°C before curing is carried out.

Properties

Color
Typical Liquid Resin Properties
ValueUnitsTest Method / Conditions
Viscosity (at 25°C, 37.35 s⁻¹)3.5PoiseBS 2782
Specific Gravity (at 25°C)1.1BS 2782
Volatile Content40%BS 2782
Acid Value18mg KOH/gBS 2782
Stability (at 20°C)6MonthsBS 2782
Gel Time (at 25°C, using 2% Catalyst M (Butanox M50) and 4% Accelerator E)18MinutesBS 2782
Laminate properties
ValueUnitsTest Method / Conditions
Glass Content34%BS 2782
Tensile Strength132MPaBS 2782
Tensile Modulus8200MPaBS 2782
Elongation (at break)2%BS 2782
Flexural Strength193MPaBS 2782
Flexural Modulus6400MPaBS 2782
Resin Properties - Unfilled Casting (Cured)
ValueUnitsTest Method / Conditions
Barcol Hardness (Model GYZ 934-1)*44BS 2782
Deflection Temperature (under load 1.80 MPa) †*78ºCBS 2782
Water Absorption (24h, at 23°C)*18mgBS 2782
Tensile Strength*79MPaBS 2782
Tensile Modulus*3400MPaBS 2782
Elongation (at break)*4.5%BS 2782
Specific Gravity (at 25°C)*1.2BS 2782
Volume Contraction*8.3%BS 2782
Refractive Index (n 20)*1.57BS 2782
Note

*Curing schedule - 24 hrs at 20ºC, 3 hrs at 80ºC
†Curing schedule - 24 hrs at 20ºC, 5 hrs at 80ºC, 3 hrs at 120ºC
** Made with 4 layers 450 g/m2 PB CSM Curing schedule - 24 hrs 20°C 16 hrs 40°C

Regulatory & Compliance

Approvals
Crystic® 272E is approved by Lloyd's Register of Shipping for use in the construction of craft under their survey.

Technical Details & Test Data

Hot Curing

Catalyst Powder B should be added at 2% and thoroughly dispersed in the resin. The catalyzed mix will remain usable for approximately 5 days at workshop temperature (20°C to 25°C). Cure will take place between 80°C and 140°C, but for most applications, 120°C will be satisfactory. Approximate setting times are shown in the table below.

Temperature Setting Time in Minutes
80°C 8
100°C 4
120°C 2

 

Heat Assisted Curing

Catalyst Powder B and Cumene Hydroperoxide should be added at 1% and thoroughly dispersed in the resin. Shortly before use, the correct amount (1% - 4%) of Accelerator E should be stirred into the resin. This mix will remain usable at workshop temperature (20°C - 25°C) for 6 to 24 hours. Gelation will take place at 60°C and above, making this formulation particularly suitable for winding and drawing applications, which require a long pot life.

Cold Curing

Crystìc 272E should be allowed to attain workshop temperature (18°C - 25°C) before use. It requires the addition of a catalyst and an accelerator to start the curing reaction.

The recommended accelerator is Accelerator E which must be thoroughly dispersed in the resin. This mix will remain usable for approximately one month at ambient temperature (25°C). Shortly before use, the catalyst should be added. The recommended catalyst is Catalyst M (or Butanox M50) which should be added at 2% into the accelerated resin mix, and thoroughly dispersed. For low taint applications, the catalyst should be Catalyst O (or Interox LA3), also at a 2% addition. It should be noted that resin which has been accelerated for several days may have a shorter pot life than freshly accelerated resin.

Additives

Crystic 272E may be pigmented by the addition of up to 5% Crystic Pigment Paste. The addition of certain pigments, ñllers or extra styrene may adversely affect the food taint, toxicity and chemical resistant properties of Crystic 272E. Customers should therefore satisfy themselves that any additions made Will give the performance required.

Post Curing

Satisfactory laminates for many applications can be made with Crystic 272E by curing at workshop temperature (20°C). However, for optimum chemical, water and heat resistant properties, heat assisted and cold cured laminates must be post cured before being put into service. Moldings should be allowed to cure for 24 hours at 20°C and then be oven cured for 3 hours at 80°C. Post curing is not normally necessary for heat cured laminates provided that the molding cycle is adequate. For low taint applications, moldings should be allowed to cure for 24 hours at 20°C and then be oven cured for 3 hours at 85°C. This should be followed by wet-steam cleaning for at least one hour. If the molding is of a suitable shape, it can be filled with hot water (80°C) for two hours instead of steam cleaning. The water should contain a perfume detergent, and several batches of clean water should be used for rinsing.

Packaging & Availability

Packaging Type
Regional Availability
  • Africa
  • Middle East
  • Oceania
Packaging
Crystic® 272E is supplied in 225kg steel containers. For transportation purposes, Crystic® 272E is Class 3.3 in the IMCO code and UN No 1866; ADR No 3l (c). Packing Group 3; Tremcard No 30G35.

Storage & Handling

Storage
Crystic® 272E should be stored in the dark in suitable closed containers. It is recommended that the storage temperature should be less than 20°C where practical, but should not exceed 30°C. Ideally, containers should be opened only immediately prior to use.