DYMAX 828, 840, 845 AND 847 ACTIVATOR CURED ADHESIVES FOR GENERAL PURPOSE BONDING

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1 ACTIVATOR CURED ADHESIVE DYMAX 828, 840, 845 AND 847 ACTIVATOR CURED ADHESIVES FOR GENERAL PURPOSE BONDING INTRODUCTION Dymax 800 series engineered adhesives are no-mix, activator cured, structural adhesives which develop handling strength in less than one minute. Their rapid set allows them to replace slower setting adhesives which cure by heat or solvent evaporation. The structural strength of these materials makes them a cost effective alternative to spot welding, brazing and mechanical fasteners. DESCRIPTIONS Dymax 828 Dymax 828 adhesive forms excellent bonds to many metal surfaces, ferrite, glass, ceramics, filled nylon, phenolic plastics and epoxy board. Dymax 828 yields tough, hard and the highest environmentally resistant bonds. Wicking grades are available for use as one part heat cure systems for metal laminating. 828 is used successfully for bonding brass and copper. Dymax 840 Dymax 840 adhesive forms excellent bonds to a wide variety of surfaces including metals, ferrite, glass, ceramics, thermoset plastics, filled nylon and epoxy board. Dymax 840 yields tough, resilient environmentally resistant bonds. 840 exhibits good thermal shock characteristics and excellent adhesion to many plated surfaces. 840 is especially suited for magnet bonding and D.C. motor assemblies. Dymax 845 Dymax 845 adhesive forms high strength bonds to iron, steel, aluminum, glass and ceramic substrates. 845 forms tough, environmentally resistant bonds and yields the highest tensile strength on steel. Dymax 845 provides the maximum gap filling capability of all the 800 series. Dymax 847 Dymax 847 adhesive bonds well to iron, steel, aluminum, ceramic, glass and epoxy board. Bonds begin to fixture in eight to ten seconds making Dymax 847 the fastest setting, activator cured product in the line. 847 yields tough, resilient bonds with excellent resistance to impact, vibration and thermal shock. TYPICAL UNCURED PROPERTIES Composition Urethane oligomer/(meth)acrylate monomer blend Appearance Straw to amber Flash Point >200 F (93 C) Solubility Isopropyl alcohol, chlorinated solvents Toxicity Low 20 rpm (cp) Test Method Standard , ASTM D-2556 T grade 3,250 5,000 7,000 4,200 ASTM D-2556 VT grade 11,000 42,500 40,000 35,000 ASTM D-2556 Gel Non-Flowing, Thixotropic Paste ASTM D-2556

2 TYPICAL CURED PROPERTIES Max Cured Film Thickness.010".020".040".010" Thermal Range (brittle/degrades) -65/350 F -65/300 F -65/300 F -65/275 F Fisher Body Side Impact, in lb [1] Tensile (lap) Shear [-2] 3,000 psi 2,500 psi 3,500 psi 2,000 psi Environmental Resistance (% strength retained) [2] Thermal Shock, 10 cycles, -60 F/+300 F 100% 100% 100% 100% Heat Aging 200 F, 1,000 hr 100% 100% 100% 100% 300 F, 1,000 hr 100% 85% 90% 30% Solvent Resistance, 100 hr, 20 C Ethylene Glycol [3] 60% 60% 40% 50% Gasoline/JP-4 [4] 100% 70% 100% 100% Freon II 100% 40% 100% 100% Salt Spray 100% 100% 90% 90% 100% Relative Humidity 70% 70% 60% 50% Brake Fluid 100% 100% 100% 100% 30W Oil 100% 100% 100% 100% Windshield Washer Fluid 50% 50% 50% 50% Footnotes: 1 Steel deforms at 30 in lbs. 2 Steel laps tested at room temperature per ASTM D Not recommended for continuous exposure. 4 Not recommended for Gasohol resistance. CURE DATA Cure Speed (Activator applied to one surface) Fixture Time [1] sec sec sec sec. Strength After 5 minutes [2] 250 psi 1,200 psi 2,500 psi 1,000 psi 10 minutes 500 psi 1,500 psi 3,300 psi 1,700 psi 1 hour 1,600 psi 2,200 psi 3,400 psi 1,700 psi 24 hours 2,900 psi 2,500 psi 3,500 psi 2,200 psi Footnotes: 1 Fixture - sufficient strength to unclamp and support weight of steel lap shear. Fixture times may increase with gap size, cooler temperatures, excessive handling, poor cleanliness, different substrates. 2 Steel laps tested at room temperature per ASTM D-1002 On part life of Activator E Activator will lose potency after Twenty Four hours. Activator must be kept in closed metal containers when not in use. Exposure to oxygen will lengthen fixture time. How To Use 1. Apply a thin, even film of Activator 501-E over one of the surfaces to be bonded. Do not apply in a heavy film. Surface will have an oily appearance. 2. Apply only a single drop or bead of adhesive to the center of the mating surface. DO NOT SPREAD ADHESIVE OVER BOND SURFACE. Adhesive / Activator mixing occurs as adhesive spreads across activated surface. 3. Assemble parts and clamp until fixture occurs (30-60 sec.). Do not stress bonds until sufficient strength has been achieved. (This may be up to several minutes depending on requirements). Note: Adhesive will not cure unless thoroughly mixed with activator. If wet/tacky adhesive is present outside of joint, it can be cured with heat or wiped away.

3 Dymax Structural Adhesives Activator Cured Adhesive/Material Selector Chart Dymax Structural Adhesives Activator Cured METALS PLASTICS Cold Rolled Steel Epoxy Board Zinc Chromate ο ο FRP Chrome Plate ο ο PPS ο ο Zinc Phosphate ο Iron Phosphate CERAMICS Galvanized ο ο Ferrite Stainless ο ο alumina Bronze/Copper ο ο ο Stone/Marble Silver/Gold ο Abrasives Aluminum ο ο GLASS Magnesium ο ο Soda Lime Pewter ο Borosilicate PLASTICS Leaded Crystal ο ο Polycarbonate ο Quartz SAN ο CLOTH Styrene ο ο ο ο ο ο ο ο ABS ο ο WOOD Valox (filled) ο ο ο ο ο Acrylics ο ο Nylon (filled) ο ο Phenolic ο ο Legend: Shaded Good Adhesion - Normally without surface preparation Unshaded ο Fair/Good Adhesion - May require surface cleaning Blank Contact Product Engineering, (860) , to discuss requirements Important: The materials of construction/product selector chart represent a compilation of tests on materials that our customers have sent into Dymax's lab for testing. It should be used as a guide only. Adhesive samples are available for testing by contacting the Technical Service department. Notes on Material Selector Chart Most solvent weldable plastics are bondable with the 800 series products once the surface has been coated with primer 510. In general, filled plastics will enhance adhesion. Solvent cleaning of parts and mechanical roughening of surfaces will also enhance adhesion. Ketone based solvents and cleaning processes which leave residues that are strongly basic or acidic in nature may retard/inhibit the cure of the adhesive and interfere with adhesion. All testing should be done on production parts. Dymax Engineering Adhesives are not recommended for bonding polyethylene, polypropylene, Teflon, fluorocarbons, hydrocarbons and silicone rubbers.

4 RECOMMENDED "SPEED OF CURE" FIXTURE TEST This test is recommended for inspection of incoming adhesive and activator and for in-line process control. Production parts are ideal for in-line inspection and QC. Alternatively, microscope slides or steel laps may be as the test substrate. Perform this test at the beginning of each shift. Chart the results. This test will verify the adhesive and activator are in good working order. Step 1: Apply a thin film of activator to one part. Cover about one-square inch. Step 2: Apply a thin 1/16" BEAD of adhesive (do not spread) to the other part. Step 3: With a ¾" to 1" overlap, press the two parts together and hold for 3 seconds. [Note as the adhesive bead rolls across the activator, it picks up the activator this is how they mix]. Step 4: Every 5 seconds, gently tap the end of one part while holding the other part still. Fixture time is when the resist movement with light finger pressure. Step 5: Record the fixture time. Fixture time should be +/- 50% of the average for your combination of adhesive and activator. Outside these limits, repeat, check method and check with different lot of activator or adhesive. STORAGE AND SHELF LIFE ADHESIVE - Store material in cool dark place when not in use. Product has a one year shelf life when stored below 90 F and in original containers. ACTIVATOR - Activator is oxygen sensitive. When not in use, container should be resealed. If activator is poured into a dish/tray, it should be replaced every shift. Do not return activator to original container. DISPENSING AND HANDLING Dymax products are available packaged in 30 ml, 250 ml, liter and bulk packaging. It may be dispensed with a variety of automatic benchtop syringe applicators or other equipment as required. For questions relating to dispensing and curing systems call Technical Service at (860) SAFETY Repeated or continuous skin contact should be avoided. Do not wear jewelry. The use of barrier hand cream is recommended. Do not wear absorbent gloves. Adhesive may be removed with hand soap and water. Avoid eye contact. See CAUTION below. Wipe excess adhesive off parts with paper towels and remove residue with chlorinated solvents, Freon or alcohol. CAUTION For industrial use only. Avoid breathing of vapors. Avoid contact with eyes and clothing. In case of contact, immediately flush with plenty of water for a least 15 minutes; for eyes, get medical attention. Wash clothing before re-use. Keep out of reach of children. Do not take internally. If swallowed, vomiting should be induced at once and a physician called. 1997, 1998, 1999 Dymax Corporation MD Medical Device Adhesives is also a registered trademark of Dymax Corporation The data contained in this bulletin which represents typical results, is furnished for information only, and is believed to be reliable. We cannot assume responsibility for results obtained by others over whose methods we have no control. It is the user's responsibility to determine suitability for the user's purpose of any product or method mentioned herein and to adopt such precautions as may be advisable for the protection of property and persons against any hazards that may be involved in the handling and use thereof. Nothing in this bulletin is to be interpreted as a representation of freedom from domination of patents

5 owned by others or a license under a Dymax Corporation patent. We recommend that each prospective user test the proposed application before repetitive use, using the data as a guide. For specific information, refer to Material Safety Data Sheet before use.