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參數(shù)資料
| 型號(hào)： | 1673998 |
| 英文描述： | SILICONE ELASTOMER SYLGARD 1.1KG |
| 中文描述： | 硅橡膠SYLGARD 1.1公斤 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 117K |
| 代理商： | 1673998 |
Dow Corning
brand Primer
or Adhesion
Promoter
Flash
Point,
°C (°F)
Volatile
Organic
Content
(VOC),
grams/
liter4
Special Properties
For Use On
For Use With
Silicone Product
Examples
P5200 Clear1
32 (90)
110/705
Most metals, glass,
ceramics and some
plastics
Pigmented two-part
addition cure
160, 165, 170
1200 Clear
17 (63)
748
1200 Red
17 (63)
774
Colored for easier
identication
P5200 Red2
32 (90)
110/705
1204
15 (59)
774
Most metals, glass
and ceramics
All one-part alcohol
cure
3140, 3145, 838,
3-1753
P52043
18 (64)
205/591
1205
5 (41)
861
Film-forming
Most plastics
All
3-6060
37 (99)
780
Improves inhibition
resistance
Most plastics and
metals
All two-part
addition cure
182, 184, 186
92-023
-4 (25)
678
Most metals, glass
and ceramics
Sylgard Prime
Coat
-3 (27)
687
1P5200 Clear is a low-VOC alternative to 1200 Clear.
2P5200 Red is a low-VOC alternative to 1200 Red.
3P5204 is a low-VOC alternative to 1204.
4The lower VOC value is for states and air quality management districts that have recognized volatile methylsiloxanes as VOC exempt.
PRIMER SELECTION GUIDE
These values are not intended for use in preparing specifications.
HOW TO USE
Mixing – 1:1/Part A:Part B
Dow Corning silicone 1:1 encapsulants 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 uniform distribution of filler, Parts A and B must
each be thoroughly mixed prior to their combination in a
1:1 ratio. When thoroughly blended, the Part A and B liquid
mixture should have a uniform appearance. The presence of
light-colored streaks or marbling indicates inadequate
mixing and will result in incomplete cure.
Due to the fast-curing characteristics of some encapsulants
included in this datasheet, automated mix and dispense
equipment should be utilized. In applications sensitive to air
entrapment, deairing with 28 to 30 inches Hg vacuum is
required.
Mixing –10:1/Base:Curing Agent
Dow Corning silicone 10:1 encapsulants are supplied in two
parts as lot-matched base and curing agent that are mixed in
a ratio of 10 parts base to one part curing agent, by weight.
After thoroughly mixing base and curing agent, agitate
gently to reduce the amount of air introduced. Allowing the
mixture to set for 30 minutes before pouring may be
adequate for removal of the air introduced during mixing.
If air bubbles are still present, vacuum deairing may be
required. Deair in a container with at least four times the
liquid volume to allow for expansion of material. Air
entrapped in the mixture can be removed by using a vacuum
of 28 to 30 inches Hg. Continue the vacuum until the liquid
expands and settles to its original volume and bubbling
subsides. This may take 15 minutes to 2 hours depending on
the amount of air introduced during stirring. For best
curing results, glassware and glass or metal stirring
implements should be used. Mix with a smooth action that
does not introduce excess air.
Pot Life/Working Time
Cure reaction begins with the mixing process. Initially, cure
is evidenced by a gradual increase in viscosity, followed by
gelation and conversion to a solid elastomer. Pot life is
defined as the time required for viscosity to double after
Parts A and B (base and curing agent) are mixed. Please
refer to individual pot life for each silicone encapsulant.
Processing and Curing
Thoroughly mixed Dow Corning silicone encapsulant may be
poured/dispensed directly into the container in which it is
to be cured. Care should be taken to minimize air
entrapment. When practical, pouring/dispensing should be
done under vacuum, particularly if the component being
potted or encapsulated has many small voids. If this
technique cannot be used, the unit should be evacuated
after the silicone encapsulant has been poured/dispensed.
Dow Corning silicone encapsulants may be either room
temperature (25°C/77°F) or heat cured. Room temperature
cure encapsulants may also be heat accelerated for faster
cure. Ideal cure conditions for each product are given in the
Product Selection Table.
Dow Corning
brand Primer or
Adhesion
Promoter
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