ARALDITE® AW 116 / HARDENER HV 953 U

• Long useable life when mixed
• Resilient bond lines
• Good resistance to static and dynamic loadings
• Suitable for bonding non-ferrous metals and sandwich panels

• The resin/hardener mix is applied with a spatula to the pretreated and dry joint surfaces.
• A layer of adhesive 0.05 to 0.10 mm thick will normally impart the greatest lap shear strength to the joint.
• The joint components should be assembled and clamped as soon as the adhesive has been applied.
• An even contact pressure throughout the joint area will ensure optimum cure.

Typical cured properties

• Unless otherwise stated, the figures given below were all determined by testing standard specimens made by lap- jointing 170 x 25 x 1.5 mm strips of aluminium alloy. The joint area was 12.5 x 25 mm in each case.
• The figures were determined with typical production batches using standard testing methods. They are provided solely as technical information and do not constitute a product specification.

Average lap shear strengths of typical metal-to-metal joints (ISO 4587)

• Cure: 16 hours at 40°C and tested at 23°C
• Pretreatment - Sand blasting

Lap shear strength versus temperature (ISO 4587) (typical average values)

• Cure: 16 hours at 40°C

Roller peel test (ISO 4578)

• Cure: 16 hours at 40°C : 4.5 N/mm

Electrolytic corrosion (DIN 53489)

• A-A/B 1,2 (4 days at 40°C/92% RH)

Lap shear strength versus immersion in various media (typical average values)

• Unless otherwise stated, L.S.S. was determined after immersion for 30 days at 23°C

Lap shear strength versus tropical weathering

• (40/92, DIN 50015; typical average values)
• Cure: 16 hours at 40°C; test at 23°C

Fatigue test on lap joints (DIN 53285)

• Cure: 16 hours at 40°C; test at 95 Hz
• 30% of static failing load :  10⁵ - 10⁶ Cycles
• 20% of static failing load : 10⁶ -10⁷ Cycles

Shear modulus (DIN 53445)

Cure: 16 hours at 40°C

• 0°C - 2GPa
• 25°C - 1.1GPa
• 50°C - 0.1GPa
• 75°C - 3MPa
• 100°C - 2MPa

Pretreatment

• The strength and durability of a bonded joint are dependant on proper treatment of the surfaces to be bonded.
• At the very least, joint surfaces should be cleaned with a good degreasing agent such as acetone or other proprie-tary degreasing agents in order to remove all traces of oil, grease and dirt.
• Low grade alcohol, gasoline (petrol) or paint thinners should never be used.
• The strongest and most durable joints are obtained by either mechanically abrading or chemically etching (“pick-ling”) the degreased surfaces.
• Abrading should be followed by a second degreasing treatment.

• Resin and hardener should be blended until they form a homogeneous mix.

Mechanical processing 

• Specialist firms have developed metering, mixing and spreading equipment that enables the bulk processing of adhesive.
• We will be pleased to advise customers on the choice of equipment for their particular needs.

Equipment maintenance

• All tools should be cleaned with hot water and soap before adhesives residues have had time to cure.
• The removal of cured residues is a difficult and time-consuming operation.
• If solvents such as acetone are used for cleaning, operatives should take the appropriate precautions and, in addition, avoid skin and eye contact.

Curing times

LSS = Lap shear strength.

Note - Curing below 10°C is unlikely to result in satisfactory performance.

Storage

• Araldite® AW 116 and Hardener HV 953U may be stored for up to 6 years at room temperature provided the components are stored in sealed containers. The expiry date is indicated on the label.

Handling Precautions 

• Our products are generally quite harmless to handle provided that certain precautions normally taken when handling chemicals are observed.
• The uncured materials must not, for instance, be allowed to come into contact with food- stuffs or food utensils, and measures should be taken to prevent the uncured materials from coming in contact with the skin, since people with particularly sensitive skin may be affected.
• The wearing of impervious rubber or plastic gloves will normally be necessary; likewise the use of eye protection.
• The skin should be thoroughly cleansed at the end of each working period by washing with soap and warm water.
• The use of solvents is to be avoided. Disposable paper - not cloth towels - should be used to dry the skin.
• Adequate ventilation of the working area is recommended.