Araldite® 2048

Structural Adhesives

Two component toughened methacrylate adhesive system

Key properties                 

• Fast setting
• Bonds well to a wide range of metals and plastics materials
• Tolerant to  less than ideal  pretreatment
• Gap filling up to 8 mm
• Tough flexible bonds for use in dynamic environment

Description                

Araldite® 2048 is a two component, room temperature curing, flexible, methacrylate adhesive. It is a fast setting product,ideal for bonding and repair on metals, composites and thermoplatics.

Product data

Property	2048/A	2048/B	mixed
Colour(visual)Specific gravityViscosityat 25°C(Pas)Pot Life(100gmat 25C)	Beige1.0 thixotropic	Red1.160	Red1.0 thixotropic10min.

 

Processing 

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 (pickling) the degreased surfaces. Abrading should be followed by a second degreasing treatment.

 

Mix ratio	Parts by weight	Parts by volume
Araldite 2048/A Araldite 2048/B	10011	10010

 

Araldite 2048 is available in cartridges incorporating mixers and can be applied as ready to use adhesive with the aid of the tool recommended by Huntsman Advanced Materials.

Application of adhesive

The resin/hardener mix may be applied manually or robotically to the pretreated and dry joint surfaces. Huntsman’s technical support group can assist the user in the selection of an suitable application method as well as suggest a variety of reputable companies that manufacture and service adhesive dispensing equipment.

A layer of adhesive 0.05 to 0.10 mm thick will normally impart the greatest lap shear strength to the joint. Huntsman stresses that proper adhesive joint design is also critical for a durable bond. The joint components should be assembled and secured in a fixed position as soon as the adhesive has been applied.

For more detailed explanations regarding surface preparation and pretreatment, adhesive joint design, and the dual syringe dispensing system, visit www.araldite2000plus.com.

 

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
Cure time to reach LSS > 1MPa	hoursminutes	25	20	15	< 5
Cure time to reach LSS > 10MPa	hoursminutes	35	30	20	10

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 we redetermined 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-metaljoints (ISO 4587)

Cured for 16 hours at 40°C and tested at 23°C

Pretreatment-Sand blasting

IMAGE 1

 

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

Cured for 16 hours at 40 C and tested at 23 C.

Pretreatment- Lightly abrade and alcohol degrease.

IMAGE 2

 

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

Cure:(a)= 16 hrs at 40°C

IMAGE 3

IMAGE 4

Storage                   

Araldite 2048/A and Araldite 2048/B may be stored for up to 2 years at 2    8°C or 6 months at room temperature provided the components are stored in sealed containers. The expiry date is indicated on the label.

Handling precautions

Caution

Our products are generally quite harmles sto 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.  These precautions are described in greater detail in the Material Safety Data sheets for the individual products and should be referred to for fuller information.

 

Huntsman Advanced Materials

All recommendations for the use of our products, whether given by us in writing, verbally, or to be implied from the results of tests carried out by us, are based on the current state of our knowledge.Not withstanding any such recommendations the Buyer shall remain responsible for satisfying himself that the products as supplied by us are suitable for his intended process or purpose.  Since we cannot control the application, use or processing of the products, we cannot accept responsibility there for.  The Buyer shall ensure that the intended use of the products will not infringe any third partys intellectual property rights.We warrant that our products are free from defects in accordance with and subject to our general conditions of supply.