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参数资料
| 型号： | 1673998 |
| 英文描述： | SILICONE ELASTOMER SYLGARD 1.1KG |
| 中文描述： | 硅橡胶SYLGARD 1.1公斤 |
| 文件页数： | 7/8页 |
| 文件大小： | 117K |
| 代理商： | 1673998 |
PREPARING SURFACES
In applications requiring adhesion, priming will be required
for the silicone encapsulants. See the Primer Selection
Guide for the correct primer to use with a given product.
For best results, the primer should be applied in a very thin,
uniform coating and then wiped off after application. After
application, it should be thoroughly air dried prior to
application of the silicone elastomer. Additional instructions
for primer usage can be found in the Dow Corning
literature, “How To Use Dow Corning Primers and Adhesion
Promotors” (Form No. 10-366) and in the information
sheets specific to the individual primers.
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. 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.
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 assemblies.
Factors that may influence performance are configuration
and stress sensitivity of components, cooling rates and hold
times, and prior temperature history. There are specialized
products including Dow Corning 3-6121 Encapsulating
Elastomer that can perform at -65°C (-85°F) and below.
At the high-temperture 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 useable.
COMPATIBILITY
Certain materials, chemicals, curing agents and plasticizers
can inhibit the cure of Dow Corning silicone encapsulants.
Most notable of these include:
Organotin and other organometallic compounds
Silicone rubber containing organotin catalyst
Sulfur, polysulfides, polysulfones or other sulfur-
containing materials
Amines, urethanes or amine-containing materials
Unsaturated hydrocarbon plasticizers
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 scale compatibility test be run to ascertain
suitability in a given application. The presence of liquid or
uncured product at the interface between the questionable
substrate and the cured gel indicates incompatibility and
inhibition of cure.
REPAIRABILITY
In the manufacture of electrical/electronic devices it is often
desirable to salvage or reclaim damaged or defective units.
With most non-silicone rigid potting/encapsulating
materials, removal or entry is difficult or impossible without
causing excessive damage to internal circuitry. Dow Corning
silicone encapsulants can be selectively removed with relative
ease, any repairs or changes accomplished, and the repaired
area repotted in place with additional product.
To remove silicone elastomers, simply cut with a sharp blade
or knife and tear and remove unwanted material from the
area to be repaired. Sections of the adhered elastomer are
best removed from substrates and circuitry by mechanical
action such as scraping or rubbing and can be assisted by
applying Dow Corning brand OS Fluids.
Before applying additional encapsulant to a repaired device,
roughen the exposed surfaces of the cured encapsulant with
an abrasive paper and rinse with a suitable solvent. This will
enhance adhesion and permit the repaired material to
become an integral matrix with the existing encapsulant.
Silicone prime coats are not recommended for adhering
product to themselves.
STORAGE AND SHELF LIFE
Shelf life is indicated by the “Use By” date found on the
product label.
For best results, Dow Corning silicone encapsulants should
be stored at or below 25°C (77°F). Special precautions must
be taken to prevent moisture from contacting these
materials. Containers should be kept tightly closed and head
or air space minimized. Partially filled containers should be
purged with dry air or other gases, such as nitrogen.
Any special storage and handling instructions will be printed
on the product containers.
LIMITATIONS
This product is neither tested nor represented as suitable for
medical or pharmaceutical uses.
PACKAGING
In general, Dow Corning silicone 1:1 mix ratio encapsulants
are supplied in nominal 0.45-, 3.6-, 18- and 200-kg (1-, 8-, 40-
and 440-lb.) containers, net weight. Dow Corning silicone
10:1 mix ratio encapsulants are supplied in nominal 0.5-, 5-,
25- and 225-kg (1.1-, 11-, 55- and 495-lb) containers, net
weight. Packaging options may vary by product. Consult
Dow Corning Customer Ser vice at (517) 496-6000 for
additional packaging options.
SAFE HANDLING INFORMATION
PRODUCT SAFETY INFORMATION REQUIRED FOR
SAFE USE IS NOT INCLUDED. 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 FROM YOUR
DOW CORNING REPRESENTATIVE, OR DISTRIBUTOR,
OR BY WRITING TO DOW CORNING CUSTOMER
SERVICE, OR BY CALLING (517) 496-6000.
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