ARALDITE® AW 146 / HARDENER HV 957

• High shear and peel strength
• Tough and resilient
• Good resistance to dynamic loading
• Bonds a wide variety of materials

• It is suitable for bonding a wide variety of metals, ceramics, glass, rubbers, rigid plastics and most other materials in common use.
• 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.

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 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 (“pick-ling”) the degreased surfaces.
• Abrading should be followed by a second degreasing treatment.

Property	Parts by Weight	Parts by Volume
Araldite® AW 146	100	100
Hardener HV 957	80	100

• 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.

Times to minimum shear strength

Temperature (°C)	10	15	23	40	60	100
Cure Time to Reach >1 N/mm² (hours)	24	12	7	2	-	-
LSS > 1 N/mm² (minutes)	-	-	-	-	30	6
Cure Time to Reach >10 N/mm² (hours)	36	18	10	3	-	-
LSS > 10 N/mm² (minutes)	-	-	-	-	45	7

LSS = Lap shear strength.

Typical Cured 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 and degreasing

Average lap shear strengths of typical plastic-to-plastic joints (ISO 4587) (typical average values)

• Cured for 16 hours at 40°C and tested at 23°C.
• Pretreatment – Lightly abrade and alcohol degrease.

 

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

• On aluminium.
• Pretreatment - Sand blasting.
• Cure: (a) = 7 days /23°C;
• Cure: (b) = 24 hours/23°C + 30 minutes/80°C

 

Property	Value	Unit	Test Method	at Condition
Roller peel test (etched aluminium)	3.5	N/mm	ISO 4578	Cure: 48 hours at 20°C
Roller peel test (etched aluminium)	5.5	N/mm	ISO 4578	Cure: 16 hours at 40°C
Roller peel test (etched aluminium)	5.5	N/mm	ISO 4578	Cure: 2 hours at 80°C
Flexural Strength	46	MPa	ISO 178	Cure: 16 hours at 40°C, tested at 23°C
Flexural Modulus	1654	MPa	ISO 178	Cure: 16 hours at 40°C, tested at 23°C

 

Lap shear strength versus immersion in various media (ISO 4587) (typical average values)

• On aluminium, cured for 16 hours at 40°C and tested at 23°C.
• Pretreatment - Sand blasting.
• Unless otherwise stated, L.S.S. was determined after immersion for 30, 60 and 90 days at 23°C.

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

• (40°C/ 92% RH), on aluminium, cured for 16 hours at 40°C and tested at 23°C.
• Pretreatment - Sand blasting

 

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

• On aluminium, cured for 16 hours at 40°C and tested at 23°C.
• Pretreatment - Sand blasting

 

Additional electrical properties

Property	Value	Unit	Test Method
Dielectric strength	425	Volt/mil	ASTM D-149
Surface resistivity	1.5 E+15	Ω	IEC 60093
Volume resistivity	5.7 E+14	Ω·cm	IEC 60093
Dielectric constant at 50Hz/1kHz/10kHz	4.4 / 4.4 / 4.3	-	IEC 60250
Loss tangent at 50Hz/1kHz/10kHz	0.8 / 0.7 / 1.0	%	IEC 60250

Typical Cured 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)

• Cure: (a) = 7 days /23°C
• Cure : (b) = 24 hours/23°C + 30 minutes/80°C

 

Property	Value	Unit	Test Method	at Condition
Roller peel test	5	N/mm	ISO 4578	Cure: 16 hours at 40°C
Shear modulus at -50°C	2	GPa	DIN 53445	Cure: 16 hours at 40°C
Shear modulus at 0°C	1.3	GPa	DIN 53445	Cure: 16 hours at 40°C
Shear modulus at 25°C	0.6	GPa	DIN 53445	Cure: 16 hours at 40°C
Shear modulus at 50°C	0.2	GPa	DIN 53445	Cure: 16 hours at 40°C
Shear modulus at 75°C	15	MPa	DIN 53445	Cure: 16 hours at 40°C
Shear modulus at 100°C	7	MPa	DIN 53445	Cure: 16 hours at 40°C

Lap shear strength versus immersion in various media at 23°C (typical average values)

Lap shear strength versus tropical weathering

• 40/92, DIN 50015; typical average values

Lap shear strength versus heat ageing

• Cure: 16 hours at 40°C, test at 23°C, 50% rh

Storage

• Araldite® AW 146 may be stored for up to 3 years at room temperature and Hardener HV 957 may be stored for up to 2 years 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.