ARALDITE® AW 5047-1 / HARDENER HW 5067

• Liquid system for vertical
• bolt and aluminium end ring
• bonding, temperature resistant

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, iso-propanol (for plastics) or other proprietary 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 (“pickling”) the degreased surfaces.
• Abrading should be followed by a second degreasing treatment

Mechanical processing

• Specialist firms have developed metering, mixing and spreading equipment that enables the bulk processing of adhesive.

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.

Typical time to reach minimum shear strength

The adhesive's performance is optimal when cured at temperatures above 60°C.

Handling properties

Reactivity

Time to reach a specific lap shear strength on sandblasted alumimium at different temperatures.

Lap Shear Strength (LSS) on metal substrates (ISO 4587)
Cure 16 hours at 40°C

Metal substrates : sandblasted & degreased with acetone

Lap Shear Strength (LSS) on plastics substrates (ISO 4587)
Cure 16 hours at 40°C

Plastic substrates : abraded & degreased with isopropanol

Lap Shear Strength vs temperature (ISO 4587)
Cure 16 hours at 40°C

Cure 1 hour at 80°C

Chemical resistance : ageing tests - immersion in different media
Unless otherwise stated, L.S.S. was determined after immersion for 30, 60 and 90 days at
23°C

Climatic testing : tropical weathering (40°C/92% humidity)
Cure 16 hours at 40°C

Thermal ageing at 70°C
Cure 16 hours at 40°C

Thermal cycling

Cure 16 hours at 40°C

100 cycles ( -30°C to 70°C to -30°C)

• Lap Shear Strength after Thermal cycling (MPa) : 19.6

Tensile properties (ISO 527)
Cure 16 hours at 40°C

Tensile properties (ISO 527)
Cure 16 hours at 40°C

Glass Transition temperature (DMA)
Cure 16 hours at 40°C

General Hardening Properties

• Unless otherwise stated, the figures given below were all determined by testing standard specimens made by lap-jointing 114 x 25 x 1.6 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) (typical average values)

• Cured for 16 hours at 40°C and tested at 23°C.
• Pretreatment - Sand blasting

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

• On aluminum.
• Pretreatment - sandblasting.
• Curing: 1 hour at 80°C.

Roller Peel Test (ISO 4578) (typical average values)

• On etched aluminum, curing: 16 hours at 40°C - 4.5 N/mm

Lap shear strength vs. immersion in various media (ISO 4578) (typical average values)

• On aluminum, cured at 40°C for 16 hours and measured at 23°C. Pretreatment - sandblasting
• Unless otherwise stated, LSS was measured at 23°C after 60 days of immersion.

Lap shear strength vs. tropical weathering (ISO 4587) (typical average values)

• (40°C/92% RH) On aluminum, cured at 40°C for 16 hours and measured at 23°C.
• Pretreatment - sandblasting

Lap shear strength vs. heat ageing (ISO 4587) (typical average values)

• On aluminum, cured at 40°C for 16 hours, measured at 23°C.
• Pretreatment - sandblasting

Shear modulus (ISO 6721) (typical average value). Curing: 1 hour at 80°C

Storage

• ARALDITE® AW 5047-1 and HW 5067 can be stored at room temperature.

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 foodstuffs 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.