ARALDITE® AW 134 / HARDENER HY 991

• Cures at room temperature
• Solvent free
• Good heat resistance

• 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

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 ( pickling ) 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.

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.

      Storage

• Araldite® AW 134 and Hardener HY 991 may be stored for up to 6 years at room temperature provided the components are stored in sealed containers.

      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.