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P R O D U C T I N F O R M A T I O N

Information about Dow Corning

Brand

Adhesive/Sealants

Silicones and Electronics

Archeological evidence shows that adhesives have been in

use for millennia, and many objects can be seen in museums

that are still bonded with adhesives after 3,000 years or more.

While you may not need that extreme of long-term, reliable

protection, you still want your adhesive to outlast your

device.

While our track record may not be thousands of years old,

we have been making adhesives for electronics almost since

their inception. Many Dow Corning products have been in

continuous use for 30 years or more and are still being applied

today, testifying to the suitability of silicone adhesives for

electronics. Silicones have long been known for durable

dielectric insulation, as barriers against environmental con-

taminants and for their stress-relieving shock and vibration

absorption. They can sustain their physical and electrical

properties over a wide range of temperature, humidity and

other harsh environmental conditions.

Developments over the years have allowed Dow Corning to

add special properties to this durable material foundation in

response to your needs. Some of the more recent develop-

ments include:

• Fast tack-free

• Lower volatility

• Faster or lower temperature cure

• Adhesion to difcult current and future substrates

Some of the applications with special needs for which we

are currently developing materials include:

• PDP and LCD terminal sealing

• Automotive electronics module and sensor sealing

• Power supply and SMPS adhering

• Electrical instrument adhering and sealing

• Circuit board laminating and adhering

Dow Corning

brand Adhesives are supplied in three

product forms:

One-Part Moisture Cure RTV

Dow Corning one-part moisture cure adhesives are gener-

ally cured at room temperature and in a range of 20 to 80

percent relative humidity. Greater than 90 percent of their

full physical properties should be attained within 24 to 72

hours depending on the product chosen and application

specics. These materials are not typically used for highly

conned or deep section cures. Materials will generally cure

about 0.25 inch per seven days from any exposed surface.

Cure progresses from the outer surface and is dependent on

the moisture in the air. Materials and parts can generally be

handled within a few minutes to an hour or two once a sur-

face skin forms. Mild heat acceleration of the cure rate may

be possible, but temperatures above 60°C (140°F) are not

recommended.

Two-Part Room Temperature Condensation Cure

Dow Corning two-part RTV adhesives cure rapidly at room

temperature after mixing. Good strength is attained within

an hour but full properties are not reached for a number of

days. These adhesives contain their own source of mois-

ture, and cure progresses evenly throughout the material.

Deep-section or conned cures are possible; however, some

limitations exist. Refer to the “Reversion” section of this

datasheet for additional information.

Room temperature adhesives contribute to lower manu-

facturing costs by avoiding the energy required for heat

cure adhesives. These adhesives are also well suited for

temperature-sensitive substrates that preclude the use of

heat cure adhesives.

Heat Cure

Most Dow Corning addition-curing adhesives should be

cured at 90°C (198°F) or above; however, Dow Corning

SE 1720 CV has been formulated to cure quickly down to

as low as 70°C (158°F). The cure rate is rapidly accelerated

with heat (see cure schedules in table). For thicker sections

or if voiding is observed, use of one of the newer low-

voiding adhesives or a 30-minute pre-cure at 70°C (158°F)

may reduce voids in the elastomer. Addition-curing materi-

als contain all the ingredients needed for cure with no

byproducts from the cure mechanism. Deep-section or con-

ned cures are possible. Cure progresses evenly throughout

the material.

Summary of content (20 pages)

PAGE 1
P R O D U C T I N F O R M A T I O N Information about Dow Corning ® Brand Adhesive/Sealants Silicones and Electronics Archeological evidence shows that adhesives have been in use for millennia, and many objects can be seen in museums that are still bonded with adhesives after 3,000 years or more. While you may not need that extreme of long-term, reliable protection, you still want your adhesive to outlast your device.
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Heat cure adhesives can improve manufacturing throughput due to shorter cure times. The longer working times of heat cure adhesives provide improved manufacturing flexibility. A range of cure temperature options is available to optimize heat and energy costs. for your personnel to allow them to work more knowledgably.
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the presence of surface contaminants such as mold release agents, oils, greases, and oxide films. One-Part Moisture Cure RTV Type Noncorrosive, one or two-part moisture curing RTV silicone elastomers; cure at room temperature without the need for heat USEFUL TEMPERATURE RANGES For most uses, silicone elastomers should be operational over a temperature range of -45 to 200°C (-49 to 392°F) for long periods of time.
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PRODUCT INFORMATION Product Description Features Potential or Typical Uses One-Part Moisture Cure RTV Dow Corning® 3-1944 RTV Coating Translucent; 1 part – no mixing required; moisture cure (RTV) – no oven required; solvent-free – no ventilation required; formulated for broader global compliance; UV indicator for automated inspection; cure system can be heat accelerable for faster in-line processing; medium viscosity providing flow/fill/self-leveling after dispensing process; Mil Spec A-46058 QPL (qual
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PRODUCT INFORMATION (Continued) Product Description Features Potential or Typical Uses Dow Corning® 3145 RTV MIL-A-46146 Adhesive/ Sealant – Clear Translucent; 1 part – no mixing required; moisture cure (RTV) – no oven required; solvent-free – no ventilation required; cure system can be heat accelerable for faster in-line processing; non-flow after dispensing process; Mil Spec A-46146 QPL (qualified product listing); high tensile strength; high elongation value for vibration/mechanical shock dampening
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PRODUCT INFORMATION (Continued) Product Description Features Dow Corning® EA-9189 RTV White Black; 2-part (1:1 mix ratio) – fast low-temperature heat cure for faster inline processing; thixotropic – flowable under shear/dispense conditions then non-flow after dispensing process; UV indicator for automated inspection; high tensile stength; cure can be accelerated with elevated temperatures for faster processing; room temperature storage Non-flowing; room-temperature cure Component fixing, power modules
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PRODUCT INFORMATION (Continued) Product Description Features Potential or Typical Uses Dow Corning® SE 9186 L Clear Translucent; 1 part – no mixing required; moisture cure (RTV) – no oven required; solvent-free – no ventilation required; fast tack-free time for faster in-line processing; cure can also be heat accelerated; low viscosity for quick flow/fill/self-leveling after dispensing process; controlled volatility – reducing the potential of volatiles affecting surrounding components Fast tack-free
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PRODUCT INFORMATION (Continued) Product Description Features Potential or Typical Uses Dow Corning® 3-6265 Thixotropic Adhesive Black; 1 part – no mixing required; heat cure; thixotropic – flowable under shear/dispense conditions then non-flow after dispensing process; UV indicator for automated inspection Non-flowing; heat cure; high tensile strength; UV indicator for inspection; non-flowing version of Dow Corning Q3-6611 Adhesive Sealing lids and housings; attaching baseplates; gasketing; connector
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PRODUCT INFORMATION (Continued) Product Description Features Dow Corning EA-6054 Thixotropic Fast LowTemperature Cure Adhesive Kit Black; 2-part (1:1 mix ratio) – fast low temperature heat cure for faster inline processing; thixotropic – flowable under shear/dipsense conditions then non-flow after dispensing process; UV indicator for automated inspection; high tensile stength; cure can be accelerated with elevated temperatures for faster processing; room temperature storage Thixotropic – flowable after
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TYPICAL PROPERTIES – PHYSICAL Specification Writers: Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on these products. For regional availability of products refer to the footnotes section of Product Information table. Viscosity/Flowability, cP or mPa.sec Extrusion Rate1, g/min Durometer psi MPa kgf/cm2 Elongation, percent Specific Gravity Dow Corning® 3-1944 RTV Coating 1 Translucent 65,725 NA 29 A — — — — 1.
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Working Time, RT RT Tack-Free Time, minutes Room Temp Cure Time, hr Heat Cure Time2 psi N/cm2 kgf/cm2 Linear Coefficient of Thermal Expansion, micron/m °C or ppm Shelf Life from Date of Manufacture, months Unprimed Adhesion Lap Shear Dow Corning® 3-1944 RTV Coating NA 16 24 NA — — — — 12 at <30°C Dow Corning® 6-1104 CV Sealant NA 64 72 NA 220 — 15 350 12 at RT Dow Corning 6-1125 CV Sealant NA 65 72 NA 230 — 16 350 12 at RT Dow Corning® 738 Electrical Sealant, White N
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TYPICAL PROPERTIES – PHYSICAL (Continued) Specification Writers: Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on these products. For regional availability of products refer to the footnotes section of Product Information table. Extrusion Rate1, g/min Durometer psi MPa kgf/cm2 Elongation, percent Specific Gravity 1 ReddishBrown 10,700 NA 29 JIS A 270 1.9 19 280 1.05 Dow Corning® SE 9168 RTV 1 Gray Nonflow 23.
PAGE 13
Working Time, RT RT Tack-Free Time, minutes Room Temp Cure Time, hr Heat Cure Time2 psi N/cm2 kgf/cm2 Linear Coefficient of Thermal Expansion, micron/m °C or ppm Shelf Life from Date of Manufacture, months Unprimed Adhesion Lap Shear Dow Corning® SE 9152 HT NA 16 22 NA 800 540 55 — 12 at <32°C Dow Corning® SE 9168 RTV NA 7 48 NA 330 225 23 — 15 at <32°C Dow Corning® SE 9184 White RTV NA 3 48 NA 310 205 (GL) 21 — 7 at <25°C Dow Corning SE 9185 Clear or White NA 6 48
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TYPICAL PROPERTIES – PHYSICAL (Continued) Specification Writers: Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on these products. For regional availability of products refer to the footnotes section of Product Information table. One- or Two-Part Color Viscosity/Flowability, cP or mPa.
PAGE 15
Working Time, RT RT Tack-Free Time, minutes Room Temp Cure Time, hr Heat Cure Time2 psi N/cm2 kgf/cm2 Linear Coefficient of Thermal Expansion, micron/m °C or ppm Shelf Life from Date of Manufacture, months Unprimed Adhesion Lap Shear 6 hrs NA NA 30 min @ 150°C 750 520 52 225 15 at 5°C NA NA NA 180 min @ 100°C 60 min @ 125°C 30 min @ 150°C 850 580 59 250 12 at <4°C Dow Corning® Q3-6611 Adhesive, Gray NA NA NA 30 min @ 150°C, 60 min @ 125°C 880 600 61 250 12 at <4°C Dow C
PAGE 16
TYPICAL PROPERTIES – ELECTRICAL Specification Writers: Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on these products. For regional availability of products refer to the footnotes section of Product Information table. At 100 Hz At 100 kHz At 1MHz Volume Resistivity, ohm-cm 425 17 2.67 2.73 — 0.0013 <0.0002 — 1.3E+15 550 550 21 22 2.59 2.62 2.58 2.61 — — 0.00035 0.00155 <0.00017 <0.00017 — — 1.37E+15 1.
PAGE 17
TYPICAL PROPERTIES – ELECTRICAL (Continued) Specification Writers: Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on this product. For regional availability of products refer to the footnotes section of Product Information table. At 1MHz At 100 Hz At 100 kHz At 1MHz Volume Resistivity, ohm-cm Agency Listing 20 — — 3.1 — — 4.00E-03 4.0E+12 NA 500 20 3.38 3.26 — 0.009 0.0026 — 7.3E+14 NA 609 24 — — 2.
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Automated airless dispense equipment can be used to reduce or avoid the need to de-air. If de-airing is required to reduce voids in the cured elastomer, consider a vacuum de-air schedule of >28 inches Hg for 10 minutes or until excessive bubbling subsides. liquid or vapor solvent or fuel that may occur in an application. These adhesives are not suitable for continuous solvent or fuel exposure; however, Dow Corning® 4-8012 Sealant & Adhesive is specially formulated for improved resistance.
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PACKAGING In general, Dow Corning adhesives/sealants are supplied in nominal 0.45-, 3.6-, 18- and 200-kg (1-, 8-, 40- and 440-lb) containers, net weight. Not all products may be available in all packages and some additional packages, such as bladder packs or tubes, may be available for certain coatings and package sizes. For further information, please see our website, www. dowcorning.com, or consult your local Dow Corning representative.
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For More Information To learn more about these and other products available from Dow Corning, please visit the Dow Corning Electronics website at www.dowcorning.com/electronics. Dow Corning and Sylgard are registered trademarks of Dow Corning Corporation. All other trademarks or brand names are the property of their respective owners. ©2000-2008 Dow Corning Corporation. All rights reserved. Printed in USA AGP9536 Form No.