Product Information
Lighting
move like a jaggerDow Corning® OE-6636 Optical
Encapsulant
FEATURES & BENEFITS •High purity
•High transparency
•High refractive index
•No by-product
•Excellent thermal stability •Excellent dielectric properties
COMPOSITION
•Phenyl Siloxane Dow Corning® OE-6636 Optical Encapsulant is a two-part, solvent-less, heat cure, optical material英文童话故事
APPLICATIONS
•Encapsulation of LED chips
•Molded lens and optical parts for LED packages
TYPICAL PROPERTIES
Specification Writers: The values are not intended for u in preparing specifications. Plea contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on this product. Property Unit Result
One or Two Part - Two
Mix Ratio - 1:2
Color - Colorless Viscosity (Part A) cP
Pa-c
13000
13
Viscosity (Part B) cP
Pa-c
5100
fuckaway
5.1 Viscosity (Mixed) cP
Pa-c
7500
7.5 Durometer Shore D - 33 Elongation % 100
Heat Cure Time at 150 ºC minutes 60
Specific Gravity (Cured) - 1.17 Unprimed Adhesion - Die Shear (Al) psi
MPa
kg/cm2
535
3.7
370
Linear CTE (by TMA) ppm/ºC 220 Refractive Index - 1.54 Transparency at 450 nm, 1 mm thick % 100
Impurity (Na+) ppm 0.1
Impurity (K+) Ppm 0.2
Impurity (Cl-) ppm 0.5
Tensile Strength psi
MPa
kg/cm2
565
3.9
40
Volume Resistivity ohm*cm 3E+16 Dielectric Strength volts/mil
kV/mm
950
37 Dielectric Constant at 1MHz - 3.3 Dissipation Factor at 1MHz - 6E-03 Youngs Modulus psi
MPa
mae west
kg/cm2
5220
36
367.2 Hardening Transition by DSC ºF
ºC
90
32
DESCRIPTION
Dow Corning® brand optical molding materials are designed to meet the challenging needs of the optical market; high purity, moisture resistance, thermal stability and optical transmittance. Injection moldable optical silicone materials from Dow Corning are two-part, heat-cure silicone resins that are especially suitable for precision molding applications, as micrometer-sized features can be replicated
on the lens surface to direct light output. Silicone optical molding materials can be molded into complex shapes, withstand heat and resist yellowing better than plastic, and are lighter than glass. Parts have been fabricated using a variety of techniques, including injection molding, casting or cavity molding, transfer molding, and others.
MIXING AND DE-AIRING Dow Corning silicone 1:1 optical molding materials are supplied in two parts that do not require lot matching. The 1:1 mix ratio, by weight or volume, simplifies the proportioning process. To ensure best properties Parts A and B must each be thoroughly mixed, inadequate mixing and may result in incomplete cure or reduced physical properties. Automated meter, mix and dispen equipment may be utilized. In applications or molds that are nsitive to air entrapment, de-airing or vacuum application in the mold may be helpful. PROCESSING/CURING The products are compatible with commercially available equipment and industry standard process. The materials can be pumped, meter mixed and molded similarly to Liquid Silicone Rubber (LSR). Mix at 1:1 ratio. They are lower in viscosity than traditional LSR materials but they are not shear thinning as the LSR’s are. This allows for reduced pressure in the pumping and mixing areas but similar performance in the injection unit compared to LSR’s. In the mold the heat does thin the material
dramatically allowing for good flow
and reproduction in the mold cavity.
Dow Corning® brand OS Fluids are
recommended to clean cured or
uncured silicone residue from
application equipment.
POT LIFE AND CURE
RATE
Cure reaction begins with the mixing
process. Initially, cure is evidenced
by a gradual increa in viscosity,
followed by gelation and conversionaltynai
to a solid elastoplastic material. Pot
life is defined as the time required for
viscosity to double after Parts A and
B (ba and curing agent) are mixed
and is highly temperature dependent.
Plea refer to the data table. The
cure time depends on the thickness
and the cure temperature ud.
USEFUL TEMPERATURE
RANGES
For most us, silicone elastomers
should be operational over a
temperature range of -45 to 200 °C
(-49 to 392 °F) for long periods of
time. However, at both the low- and
high temperature ends of the
spectrum, behavior of the materials
and performance in particular
applications can become more
complex and require additional
considerations and should be
adequately tested for the particular
end u environment. For low-
temperature performance, thermal
cycling to conditions such as -55°C
(-67°F) may be possible, but
performance should be verified for
your parts or asmblies. Factors that
may influence performance are
configuration and stress nsitivity of
components, cooling rates and hold
times, and prior temperature history.
At the high-temperature end, the
durability of the cured silicone
elastomer is time and temperature
dependent. As expected, the higher
the temperature, the shorter the time
the material will remain uable.
COMPATIBILITY
Certain materials, chemicals, curing
agents and plasticizers can inhibit the
cure of addition cure adhesives. Most
notable of the include: organotin
and other organometallic compounds,
silicone rubber containing organotin
catalyst, sulfur, polysulfides,
polysulfones or other sulfur
containing materials, unsaturated
afternoontea
hydrocarbon plasitcizers, and some
solder flux residues. If a substrate or
material is questionable with respect
to potentially causing inhibition of
cure, it is recommended that a small
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scale compatibility test be run to
ascertain suitability in a given
application. The prence of liquid or
uncured product at the interface
between the questionable substrate
and the cured material indicates
incompatibility and inhibition of
cure.
HANDLING
PRECAUTIONS
PRODUCT SAFETY
INFORMATION REQUIRED
FOR SAFE USE IS NOT
INCLUDED IN THIS
DOCUMENT. BEFORE
HANDLING, READ PRODUCT
AND MATERIAL SAFETY
DATA SHEETS AND
CONTAINER LABELS FOR
SAFE USE, PHYSICAL AND
HEALTH HAZARD
INFORMATION. THE
MATERIAL SAFETY DATA
SHEET IS AVAILABLE ON THE
DOW CORNING WEB SITE AT
DOWCORNING, OR
感觉英文FROM YOUR
DOW CORNING
REPRESENTATIVE, OR
DISTRIBUTOR, OR BY
CALLING YOUR GLOBAL
DOW CORNING CONNECTION.
LIMITATIONS
This product is neither tested nor
memory什么意思reprented as suitable for medical or
pharmaceutical us.
HEALTH AND ENVIRONMENTAL INFORMATION
To support Customers in their product safety needs, Dow Corning has an extensive Product Stewardship organization and a team of Product Safety and Regulatory Compliance (PS&RC) specialists available in each area.
For further information, plea e our Website, or consult your local Dow Corning reprentative.
LIMITED WARRANTY INFORMATION – PLEASE READ CAREFULLY
The information contained herein is offered in good faith and is believed to be accurate. However, becau conditions and methods of u of our products are beyond our control, this information should not be ud in substitution for customer’s tests to ensure that our products are safe, effective, and fully satisfactory for the intended end u. Suggestions of u shall not be taken as inducements to infringe any patent.
Dow Corning’s sole warranty is that our products will meet the sales specifications in effect at the time of shipment.
Your exclusive remedy for breach of such warranty is limited to refund of purcha price or replacement of any product shown to be other than as warranted.
DOW CORNING SPECIFICALLY DISCLAIMS ANY OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY.
DOW CORNING DISCLAIMS LIABILITY FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES. HOW CAN WE HELP YOU TODAY?
Tell us about your performance, design and manufacturing challenges. Let us put our silicon-bad materials experti, application knowledge and processing experience to work for you.
For more information about our materials and capabilities,
uha
To discuss how we could work together to meet your specific needs, email or go /contactus for a contact clo to your location. Dow Corning has customer rvice teams, science and technology centers, application sup
port teams, sales offices and manufacturing sites around the globe.
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