Huntsman - ARALDITE CY 5855 / ARADUR HY 5855-1

Enhanced TDS

Identification & Functionality

Chemical Family: Epoxy & Epoxy Derivatives
Fillers Included: Mineral
RTU Product Type: Casting Resin
Technologies: Composite Materials
Product Families: Composite Materials — Resin Systems
Casting

Features & Benefits

Ready-to-Use Product Features

High Temperature Curing,

Low Viscosity,

Room Temperature Curing

Features and Benefits

Very lower system viscosity allows high filler content.
Flexible and resilient castings, very good crack resistance.

Applications & Uses

Composites Processing Methods

Gravity Casting

Product End Uses

Electrical Components,

Electronic Components,

Electronic Encapsulation,

Electronics Potting

Markets

Electrical & Electronics

Applications

Electrical & Electronics — Packaging & Assembly

Potting Compounds

System Preparation

To make “Epoxy mortar” for Busbar application (150 kg batch)

Put mixed filler into mixer (planetary or kneader type mixer is recommended) and apply vacuum, 10-20 mbar, about 30 min.
Mix resin, hardener together first and put the mixture to mixer.
Mixing all together 15-20 min, RT-35 deg C, 10-20 mbar.
Casting under atmospheric condition, in 20-30 min.

Curing and demolding

Demolding after 6-8 hrs at RT or 1-3 hrs at 60 deg C.
Post curing 1-2 days at RT or 3-5 hrs at 60 deg C.

Application Information

The encapsulation or potting of electrical and electronic components. Especially Busbar (busway) when higher filler loading.

Technical Details & Test Data

Filler Information

The addition of powdered mineral filler such as silica flour, Microdol, chalk flour, etc. has been found to improve the performance of castings in a large number of applications. In particular, the use of mineral fillers:

Reduces shrinkage and decreases exothermic temperature rise on curing.
Imparts a lower coefficient of thermal expansion.
Improves thermal conductivity.
Imparts a higher elastic modulus but reduces elongation at break.
Cuts the production cost per casting.

The performance data given below for filled system was all determined using standard test specimens containing mixed various fillers.

Technical Data

Property	Test Method	Condition	Test Value
Initial Viscosity at 25°C	Brookfield viscometer	Cured for 10h at 140°C, Determined on standard test specimen at 23°C	550 - 13,200 mPa.s
Pot life at 25°C		Cured for 10h at 140°C, Determined on standard test specimen at 23°C	25 - 50 min
Geltime at 60°C		Cured for 10h at 140°C, Determined on standard test specimen at 23°C	9 - 16 min
Tg (Curing at 80°C for 3hr)		Cured for 10h at 140°C, Determined on standard test specimen at 23°C	-65°C
Mix temperature		Cured for 10h at 140°C, Determined on standard test specimen at 23°C	23 - 40°C
Mold temperature		Cured for 10h at 140°C, Determined on standard test specimen at 23°C	23°C
Flexural strength	ISO R 527	Cured for 10h at 140°C, Determined on standard test specimen at 23°C	128 MPa
E-modulus (from flexural test)	ISO R 527	Cured for 10h at 140°C, Determined on standard test specimen at 23°C	3340 MPa
Impact Test	Charpy Impact with notch	Cured for 10h at 140°C, Determined on standard test specimen at 23°C	20 kJ/m²
Critical stress intensity factor (KIC)	CG 216-0/89	Cured for 10h at 140°C, Determined on standard test specimen at 23°C	110 J/m²
Water absorption	ISO 62	Cured for 10h at 140°C, Determined on standard test specimen at 23°C	Room Temp / 4 days: 0.2 % by wt., 100°C / 1 day: 2.9 % by wt.
CTE (Coefficient of thermal expansion)	DIN 53752/80	Cured for 10h at 140°C, Determined on standard test specimen at 23°C	-20 - 22 ppm/K
Dielectric Strength		Cured for 10h at 140°C, Determined on standard test specimen at 23°C	26 kV/mm
Volume Resistivity		Cured for 10h at 140°C, Determined on standard test specimen at 23°C	1.6 x 10¹⁶ Ω·cm

Safety & Health

First Aid Information

Contamination of the eyes by resin, hardener or casting mix should be treated immediately by flushing with clean, running water for 10 to 15 minutes. A doctor should then be consulted.
Material smeared or splashed on the skin should be dabbed off, and the contaminated area then washed and treated with a cleansing cream (see above). A doctor should be consulted in the event of severe irritation or burns. Contaminated clothing should be changed immediately.
Anyone taken ill after inhaling vapours should be moved out of doors immediately. In all cases of doubt call for medical assistance.

Industrial Hygiene

Mandatory and recommended industrial hygiene procedures should be followed whenever our products are being handled and processed.

Handling Precautions

Protective clothing	Yes
Gloves	Essential
Arm protector	Recommended when skin contact likely
Goggestery diasses	Yes
Respirator/dust mask	Recommended
Skin protection before starting work	Apply barrier cream to exposed skin
Skin protection after washing	Apply barrier or nourishing cream
Skin protection cleansing of contaminated skin	Dab off with absorbent paper, wash with warm water and alkali-free soap, then dry with disposable towels. Do not use solvents
Clean shop requirements	Cover workbenches, etc. with light coloured paper. Use disposable breakers, etc.
Disposal of spillage	Soak up with sawdust or cotton waste and deposit in plastic-lined bin
Ventilation: of workshop	Renew air 3 to 5 times an hour
Ventilation: of workplace	Exhaust fans. Operatives should avoid inhaling vapours.

Storage & Handling

Storage Conditions: The components have to be stored under dry conditions at 18-40°C, in tightly sealed original containers. Under these conditions, the shelf life will correspond to the expiry date stated on the label. After this date, the product may be processed only following reanalysis. Partly emptied containers should be closed tightly immediately after use.

Other