Crystic 702PAX Resin - Scott Bader

CRYSTIC ® <strong>702PAX</strong><br />

Polyester <strong>Resin</strong> for Vacuum Injection<br />

Introduction<br />

<strong>Crystic</strong> <strong>702PAX</strong> is a pre-accelerated, orthophthalic polyester resin with low viscosity and controlled exotherm<br />

characteristics.<br />

Applications<br />

<strong>Crystic</strong> <strong>702PAX</strong> was developed primarily as a Vacuum Injection resin, but its properties make it suitable for use in other,<br />

similar techniques. The viscosity and exotherm characteristics of <strong>Crystic</strong> <strong>702PAX</strong> make it particularly suitable for the<br />

manufacture of large structures by Vacuum Injection methods. Where longer geltimes are required, <strong>Crystic</strong> 702PA<br />

should be used.<br />

Features and Benefits<br />

<strong>Crystic</strong> <strong>702PAX</strong> has excellent mechanical properties and impact resistance. It is compatable with most reinforcement<br />

types, including polyaramids, such as Keviar®.<br />

Formulation<br />

<strong>Crystic</strong> <strong>702PAX</strong> should be allowed to attain workshop temperature (18°C — 20°C) before use. It requires only the<br />

addition of a catalyst to start the curing reaction. The recommended catalyst is Catalyst M (or Butanox M50), which<br />

should be added at 1% - 2% into the resin. The catalyst should be thoroughly incorporated into the resin, using a low<br />

shear mechanical stirrer where possible. Geltimes of <strong>Crystic</strong> <strong>702PAX</strong> and <strong>Crystic</strong> 702PA, using various catalyst levels,<br />

can be approximately determined from the table below.<br />

Pot Life<br />

Temperature Pot Life in minutes using Catalyst M (Butanox M50)<br />

<strong>Crystic</strong> <strong>702PAX</strong><br />

<strong>Crystic</strong> 702PA<br />

1.0 M 2.0 M 3.0 M 1.0 M 2.0 M 3.0 M<br />

Pot life in minutes at 15ºC - - 41 - - 120<br />

Pot life in minutes at 20ºC 65 33 25 192 98 67<br />

Pot life in minutes at 25ºC - - 16 - - 40<br />

The resin, mould and workshop should be at, or above 15°C before curing is carried out.<br />

Additives<br />

The addition of fillers or pigment pastes can adversely affect the Vacuum Injection process and also the properties of the<br />

cured laminate. Users should seek the advice of <strong>Scott</strong> <strong>Bader</strong>’s Technical Service Department before making any<br />

additions.<br />

Post Curing<br />

Satisfactory laminates for many applications can be made from <strong>Crystic</strong> <strong>702PAX</strong> by curing at workshop temperature<br />

(20°C). For optimum properties, however, laminates should be postcured before being put into service. The laminate<br />

should be allowed to cure for 24 hours at 20°C, and then be oven cured for 16 hours at 40°C or 3 hours at 80°C.<br />

<strong>Crystic</strong> <strong>702PAX</strong> - TDS 1/3

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Typical Properties<br />

The following tables give typical properties of <strong>Crystic</strong> <strong>702PAX</strong> when tested in accordance with BS or BS EN ISO test<br />

method.<br />

Property<br />

Appearance<br />

Liquid <strong>Resin</strong><br />

Mauvish<br />

Viscosity at 25 ºC Poise 1.6<br />

Specific Gravity at 25 ºC 1.08<br />

Volatile Content % 50<br />

Acid Value Mg KOH/g 22<br />

Stability at 20 ºC months 3<br />

Geltime at 25 ºC using 1% Catalyst M<br />

(or Butanox M50)<br />

Property<br />

minutes 65<br />

Barcol Hardness (Model GYZJ 934-1) 42<br />

Deflection Temperature under load †<br />

(1.80 MPa)<br />

ºC 74<br />

Water Absorption 24 hours at 23ºC mg 20<br />

Tensile Strength MPa 44<br />

Tensile Modulus MPa 3890<br />

Fully Cured* <strong>Resin</strong><br />

(unfilled casting)<br />

Elongation at Break % 1.2<br />

Specific Gravity at 25 ºC 1.20<br />

* Curing schedule – 24 hours at 20 ºC, 3 hours at 80ºC<br />

† Curing schedule – 24 hours at 20 ºC, 5 hours at 80ºC, 3 hours at 120 ºC<br />

Property<br />

C.S.M** Laminate<br />

Glass Content % 38<br />

Tensile Strength MPa 115<br />

Tensile Modulus MPa 6600<br />

Elongation at Break % 2.3<br />

Flexural Strength MPa 180<br />

Flexural Modulus MPa 8250<br />

** Made with 1 layer Rovicore 600 D3 600<br />

Curing schedule – 24 hours at 20ºC, 16 hours at 40ºC<br />

<strong>Crystic</strong><strong>702PAX</strong> - TDS 2/3

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Storage<br />

<strong>Crystic</strong> <strong>702PAX</strong> should be stored in the dark in suitable closed containers. It is recommended that the storage<br />

temperature should be less than 20ºC where practical, but should not exceed 30ºC. Ideally, containers should be<br />

opened only immediately prior to use.<br />

Packaging<br />

<strong>Crystic</strong> <strong>702PAX</strong> is supplied in 25kg, 200kg and 1 tonne containers. Bulk supplies can be delivered by road tanker.<br />

Health & Safety<br />

Please see separate Material Safety Data Sheet.<br />

Version 2 : February 2013<br />

All information on this data sheet is based on laboratory testing and is not intended for design purposes. <strong>Scott</strong> <strong>Bader</strong> makes no representations or warranties of any<br />

kind concerning this data. Due to variance of storage, handling and application of these materials, <strong>Scott</strong> <strong>Bader</strong> cannot accept liability for results obtained. The<br />

manufacture of materials is the subject of granted patents and patent applications; freedom to operate patented processes is not implied by this publication.<br />

SCOTT BADER COMPANY LIMITED<br />

Wollaston, Wellingborough, Northamptonshire, NN29 7RL<br />

Telephone: +44 (0) 1933 663100<br />

Facsimile: +44 (0) 1933 666623<br />

www.scottbader.com<br />

<strong>Crystic</strong><strong>702PAX</strong> - TDS 3/3