ARALDITE DZ 80-1 Primer for Epoxy Resin Adhesives - Lindberg ...

Adhesives and ToolingStructural AdhesivesARALDITE DZ 80-1Primer for Epoxy Resin AdhesivesKey propertiesDescriptionTypical productdata• Improves bond strength• Low viscosity• Single component• Heat curingAraldite DZ 80-1, a low-viscosity heat curing resin solution, is used mainly in thepretreatment of copper and copper alloy surfaces prior to bonding with Aralditeadhesives. It is an alternative to the chemical pretreatment for copper. The use ofAraldite DZ 80-1 improves bond strength and in particular, the retention of bondstrength during long- term service. The bond quality of joints made with nickel alloys islikewise improved by surface pretreatment with Araldite DZ 80-1Araldite DZ 80-1 is also used to protect pretreated areas on all metals.Properties Units Araldite DZ 80-1Appearance - Amber liquidDensity at 25ºC Mg/m 3 0.85 – 0.95Viscosity at 25ºC Pas 0.1 – 0.6Shelf life at 18-25ºC Months 12Solid content at 150ºC % 18-21Flashpoint ºC 2ProcessingPretreatmentDegrease and abrade the surfaces to be bonded. Detailed information is given in theVantico instruction manual Publication A17 “Users Guide to Adhesives”. Thoughexperience shows that the best bond strength and durability are obtained whenbonding is carried out immediately after pretreatment, this ideal procedure is notalways practicable. If there is unavoidable delay due, for example, to the scheduling ofbonding operations on multi-part assemblies, the use of Araldite DZ 80-1 on thefreshly pretreated surfaces will help prevent consequent loss in bond quality.Application an dryingApply a thin coating of the primer (by brushing, dipping or spraying) to both thesurfaces to be bonded.Note Spray application usually necessitates dilution with industrial methylated spirit. Removesolvent by drying in dust-free atmosphere for half an hour at 80ºC.Storing the primed partsSeal up the primed parts in polythene bags – inclusion of a silica gel capsuleeliminates risk of condensation. Large primed areas may be sealed off by coveringwith polythene sheet or non-transferring adhesive-backed paper. Store in a clean dryplace. In these conditions Araldite DZ 80-1 dried or dried and cured, remains effectivefor several months.Note Care must be taken to avoid handling pretreated surfaces with bare hands either beforeor after priming. Operators should wear clean gloves.May 2001 Publication No. A 27 h GB Page 1 of 2

CuringCuring of the primer depends on the temperature at which the adhesive itself will becured.Araldite adhesives cured at temperatures below 150ºCCure the film of primer for at least half an hour at 150ºC.Allow to cool and abrade with fine abrasive cloth/paper before applying the adhesive.Araldite adhesives cured at temperatures above 150ºCThe film of primer may be cured as above – i.e. prior to application of the adhesive.Alternatively:Apply the adhesive to the dried film, assemble the joint and cure the adhesive andprimer in one operation.Abrading the primer should in this case be omitted.TypicalpropertiesThe figures were determined with typical production batches using standard testingmethods. They are provided solely as technical information and do not constitute aproduct specification.Test material• 1.6 mm half hard annealed copper and 1.6 mm BS L163 aluminium degreased andabraded. The copper surface is primed with DZ 80-1 and dried for 30 minutes at80ºC.• Araldite AT1-1 is fused onto both surfaces to be bonded and assembled with12.5mm overlap – cure 3 hours at 160ºC using 40k Pa pressure.Mean lap shear strength tested at 23ºC±2ºC… .21.3 N/mm 2 .StorageHandlingprecautionsAraldite DZ 80-1 should be stored in a dry place at 18-25ºC. In these conditionsAradite DZ 80-1 has an assigned shelf life of 12 months. Containers carry an expirydate accordingly. Quality is sustained well beyond the expiry date, although aperformance check by the user is advisable on out-of-date material..Note At temperatures below 15ºC Araldite DZ 80-1 may form a jelly during storage.Reversion to a fully liquid condition is achieved by heating for a few minutes at ca40ºC with stirring. Care must be taken not to warm longer than is necessary, otherwisesolvent will be lost by evaporation.CautionVantico products are generally quite harmless to handle provided that certain precautions normally taken whenhandling chemicals are observed. The uncured materials must not, for instance, be allowed to come into contact withfoodstuffs or food utensils, and measures should be taken to prevent the uncured materials from coming in contact withthe skin, since people with particularly sensitive skin may be affected. The wearing of impervious rubber or plasticgloves will normally be necessary; likewise the use of eye protection. The skin should be thoroughly cleansed at theend of each working period by washing with soap and warm water. The use of solvents is to be avoided. Disposablepaper - 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 Vantico publication No. 24264/3/e Hygienic precautions forhandling plastics products of Vantico and in the Vantico Material Safety Data sheets for the individual products. Thesepublications are available on request and should be referred to for fuller information.Araldite DZ 80-1. This product and its vapour are highly flammable. Due precaution must be taken against all possiblefire risks. Keep the liquid product away from open flames, electric elements, etc., and firmly seal the container whennot in use. If the product catches fire, use either a carbon dioxide, a dry powder, a foam or a vapourising liquidextinguisher – or apply waterspray.VanticoAdhesives and ToolingDuxford, CambridgeEngland CB2 4QATel: +44 (0) 1223 832121Fax: +44 (0) 1223 493322www.vantico.comAll recommendations for the use of our products, whether given by us in writing, verbally, or to be implied from theresults of tests carried out by us, are based on the current state of our knowledge. Notwithstanding any suchrecommendations the Buyer shall remain responsible for satisfying himself that the products as supplied by us aresuitable for his intended process or purpose. Since we cannot control the application, use or processing of theproducts, we cannot accept responsibility therefor. The Buyer shall ensure that the intended use of the products willnot infringe any third party’s intellectual property rights. We warrant that our products are free from defects inaccordance with and subject to our general conditions of supply.© Vantico Ltd, 2000® Araldite is a registered trademark of Vantico AG, Basel, SwitzerlandMay 2001 Publishing No. A 27 h GB Page 2 of 2