Aerospace Adhesives Epocast® 1616 A/B Low density two part ...

Ciba Specialty ChemicalsPerformancePolymersStructural AdhesivesAerospace AdhesivesEpocast ®1616 A/BLow density two part epoxy syntacticKey properties• Room temperature curing• Self extinguishing• High strength• Soft pasteDescriptionEpocast 1616 A/B is a self extinguishing, low density epoxy syntactic developed for edgesealing in honeycomb structures. Special features of flame resistance, high strength, lowdensity, and ease of handling have been incorporated into this system. Epocast 1616 A/Bis qualified to BMS 5-28, type 16.Typical productdataPropertyEpocast1616 AEpocast1616 BMixedSyntacticTest MethodColour (visual) off white amber off white visualSpecific gravity ca.0.65 ca.1.0 ca.0.7 ASTM-D-1622Viscosity at 25°C (Pas) paste ca.0.4 soft paste ASTM-D-2196Gel time (60 gm at 25°C)mins - - 30 ASTM-D-2471ProcessingPretreatmentThe strength and durability of a bonded joint are dependant on proper treatment of thesurfaces to be bonded.At the very least, joint surfaces should be cleaned with a good degreasing agent such asacetone, trichloroethylene or proprietary degreasing agent in order to remove all tracesof oil, grease and dirt. Alcohol, gasoline (petrol) or paint thinners should never be used.The strongest and most durable joints are obtained by either mechanically abrading orchemically etching (“pickling”) the degreased surfaces. Abrading should be followed bya second degreasing treatment.Ciba Specialty ChemicalsPerformancePolymersAll recommendations for the use of our products, whether given by us in writing, verbally, or to be implied from the results oftests carried out by us, are based on the current state of our knowledge. Notwithstanding any such recommendations the Buyershall 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 therefor. The Buyershall ensure that the intended use of the products will not infringe any third party’s intellectual property rights. We warrant thatour products are free from defects in accordance with and subject to our general conditions of supply.Duxford, CambridgeEngland CB2 4QA© Ciba Specialty Chemicals PLC, 1998® Registered Trademark of Ciba Specialty Chemicals Holding Inc.Tel: +44 (0) 1223 832121Fax: +44 (0) 1223 493322September 1998 Publication No. A 339 b GB Page 4 of 4 September 1998 Publication No. A 339 b GB Page 1 of 4

Mix ratioParts by weightEpocast 1616 A 100 -Epocast 1616 B 7 -Parts by volumeThe resin and hardener should be blended until they form a homogeneous mix.Mechanical processingSpecialist firms have developed metering, mixing and spreading equipment that enablesthe bulk processing of adhesive.Ciba Specialty Chemicals will be pleased to advise customers on the choice of equipmentfor their particular needs.Equipment maintenanceAll tools should be cleaned with hot water and soap before adhesives residues have hadtime 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 appropriateprecautions and, in addition, avoid skin and eye contact.Typical cure schedule24 hours at 21ºC or gelation at room temperature followed by 5 hours at 50ºC.StorageHandlingprecautionsEpocast 1616 A/B may be stored for up to 6 months at 6-28ºC, provided that thecomponents are stored in their original sealed containers. The expiry date is indicated onthe label.CautionCiba Specialty Chemicals’ products are generally quite harmless to handle provided thatcertain precautions normally taken when handling chemicals are observed. The uncuredmaterials must not, for instance, be allowed to come into contact with foodstuffs or foodutensils, and measures should be taken to prevent the uncured materials from coming incontact with the skin, since people with particularly sensitive skin may be affected. Thewearing of impervious rubber or plastic gloves will normally be necessary; likewise the useof eye protection. The skin should be thoroughly cleansed at the end of each workingperiod 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 ventilationof the working area is recommended. These precautions are described in greater detail inCiba Specialty Chemicals publication No. 24264/3/e Hygienic precautions for handlingplastics products of Ciba Specialty Chemicals and in the Ciba Specialty Chemicals MaterialSafety Data sheets for the individual products. These publications are available on requestand should be referred to for fuller information.Typical curedpropertiesThe figures were determined with typical production batches using standard testingmethods. They are provided solely as technical information and do not constitute aproduct specification.PropertiesUnitsResultsTest methodCompressive strength MPa 38 ASTM-D-695Compressive modulus GPa 1.0Tensile lap shearMPa 5.2 ASTM-D-1002aluminium/aluminiumFlammability, horizontal/vertical - self extinguishing -Weight gain on immersion after 24 hours at 25°CTest method ASTM-D-543TT-S-735, type 111 testfluidMIL-M-5606 hydraulicfluidSkydrol 500 ADistilled waterDistilled water%0 0.5 1 1.5 2 2.5 3 3.5September 1998 Publication No. A 339 b GB Page 2 of 4 September 1998 Publication No. A 339 b GB Page 3 of 4